LPG vs. Petrol

So you’ve done all your calculations and decided to convert your car to LPG like over 700,000 other Australians. It sounds good in theory and the government rebate of $2000 is a great help. The fuel figures show your savings in dollars will have your conversion paid off within a year or two depending on your vehicle and the mileage done. But have you got all the facts?

Environmental impact

The environment is another winner in the change you have made by lowering greenhouse emissions. The Australian Greenhouse Office website states that the mass of CO2 gas released of the exhaust pipe by the burning of one litre of fuel is:

  • 2.3 kg for Petrol
  • 1.5 kg for LPG.

LPG = Less kilometres per litre

You can expect a 20-30 per cent increase in gas consumption over petrol per kilometre because the lower energy content of gas requires more to be burned in the engine compared with petrol.


There is no government excise until July 2011. But then the price of LPG will gradually rise over 5 years.

The excise will increase as follows:

  • 1 July 2011 initial excise of 2.5 cents per litre
  • 1 July 2012 excise increases to 5.0 cents per litre
  • 1 July 2013 excise increases to 7.5 cents per litre
  • 1 July 2014 excise increases to 10.0 cents per litre
  • 1 July 2015 excise increases to 12.5 cents per litre

In knowing all this, is or was a change to LPG worth it?

Do all the figures add up and, despite the cost savings, has your vehicle’s power and torque suffered? Is it less efficient when towing or carrying heavy loads, especially on long trips and going up hills?

Thinking about purchasing a LPG vehicle? NRMA Car Loans offer great rates to NRMA Members.

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127 thoughts on “LPG vs. Petrol

  1. LPG is, to me, a badly thought out quick-fix. It’s not a real alternative. Even if 70000 motorists got the government rebate, what percentage of cars on the road is that? Any reduction in greenhouse gases is minimal. If it was a genuine alternative the serious car manufacturers would be investing in it. Surprise surprise! They’re not.

    The government rebate on LPG was made to shut people up so the powers that be could say, “What are you whinging about the price of petrol for? There’s an alternative now… here’s some money!”

    • Problems,problems,problems, I have a vs commodore which I converted to gas and I wish I never had. Probably a third increase in fuel consumption over petrol and about the same in loss of power. Constant backfiring, goes out of tune, runs hotter, hard to start, damaged engine components, very costly, never again I will own a car with LPG!!!!!

      • Why do all Taxis use it. They drive everywhere for money, why don’t they use petrol if it’s better and less expensive?

          • I was going to say that….but felt a twinge of pity. Commodore owners have enough to worry about without having their noses rubbed in it. :lol:

            • Ever wonder why you dont see Commodore taxi’s?
              -because they are unreliable heaps of crap.

              If you want gas – go Gas injection

        • I drove cabs as a casual driver for about 6 years in Brisbane, Australia. Most cars were Fords with Tickford factory dual-fuel petrol/LPG (autogas) conversion. There has been a lot of bullshit published about the merits of running on gas vs. petrol. First of all, a litre of gas has a much lower energy yield than a litre of petrol, so In my experience, operation on gas was maintenance-intensive. Fleet mechanics had to constantly clean parts of the gas regulator. It also took longer to fill with LPG compared to petrol, and filling problems were common. Starting with foot on the accelerator resulted in a loud explosion which blew in the air filter element and sometimes meant a trip back to the workshop. If it hadn’t been for the lower excise tax on gas, most operators would stay on petrol. Gas just wasn’t worth the bloody trouble.

      • I’ve had two cars ~ HZ v8 and currently a computer-managed 4-litre Falcon ~ on lpg, and couldn’t be happier. Without ANY problems, nor ‘tune-ups’/whatever, I’m going the same distance for about 30% less (cash). Current local prices have petrol slightly more than twice lpg.
        Performance doesn’t really suffer: I’m too old to be a hoon off the lights, but young enough to get the occasional speeding ticket.
        (Currently under licence-suspension for doing 40km over the limit….on the Freeway!)(and have had it to over 200km on one try-out.)
        Unfortunately the days of lpg are limited, since the major manufacturers are shutting up shop. Meanwhile I’ve also converted my generator and pump to run on lpg….and a couple of whizkids down the road are running a couple of vehicles on hydrogen.
        In comparison to the alternatives petrol has nothing much going for it as far as I’m concerned.

  2. To Whom is interested, we have been using LPG as the prime fuel for most of our vehicles (1st vehicle 1989), the only exception was a turbo cordia. The slight loss of power is no major concern as we still arrive at our destination and are able to exceed the posted speed limit which we do not. the latest vehicle is a 4 litre Toyota Prado it is our tow unit for a 2000kg pop top van and it is fitted with the start of the art fuel injection and it was the dearests and it is more efficient than our other two vehicles which our vapour fuelled via air induction manifold. The cost saving well and truly pays for the out lay and marginal loss of power.

  3. I have a Holden Commodore which I bought at auction in 1997. When it had 50,000 kilometres I had an LPG dual conversion . It has now done 274,000 with little trouble. There was one worn hose replaced for $10 and only one tune up costing around $160. This is for ten years and 220,000 km. The manufacturers state that the engine last longer on LPG.
    It is the best thing I have ever done, it has saved me so much money.
    Because we have an abundance of LPG in Australia I cannot understand why it is so expensive, when we are exporting it overseas for arould 5c per litre.

  4. I have a 2001 model Falcon which tows occassionally a 1200kg caravan. I had LPG fitted at 105000 kms and wish I had done so earlier.Fuel consumption has risen by about 8% and I have not noticed any drop in power at all.The car seems to run smoother on gas and is saving us lots of money.

  5. I agree with Marcus. The car manufacturers are not really serious about LPG as an alternative fuel source.

    I recently purchased a 2007 VE Commodore Lumina which was advertised with LPG as a factory option. However, when I went to the Holden dealer and tried to order an LPG fitted Lumina, I was told that Holden had discontinued the LPG option (only a month into their Lumina promotion), because there wasn’t enough customer interest. So, here was I, an interested customer, who could not get a new car with LPG fitted because it wasn’t cost effective for the manufacturer to do it, even though they still advertised the LPG option for a further month after I was told they weren’t doing it! To make matters worse, I was then told that no self-respecting after-market LPG conversion centre would touch Holden’s new Alloytech engine in the VE because quote, ‘it wouldn’t last 100,000km’ before the engine would be likely to fail.

    Now that petrol prices look like passing $1.50 a litre, LPG would be a very welcome cost saver, however, thanks to Holden’s Alloytech there’s no way I’ll be able to get the conversion done!

    The inference I draw from this; Holden is not really interested in LPG as an alternative fuel source, otherwise they wouldn’t have made it so difficult for customers to convert one of their biggest selling models. Thanks for nothing Holden!

  6. Australia is a vast and disparately settled country.

    Most of us have a useful life. We must travel long distances, mostly by

    The appalling Australian Federal Government tax on our second most important Constitutional right of transportation remains a blot on our
    culture, on Canberra and the pretentious Federal Department of Transport’s Bureau of Transport Economics. But this is not a surprise. Transport has been as badly handled by Canberra as our primary Constitutional plank of Communication. And Canberra’s treatment of the motor car driver and owner has been a smear on the local autombile manufacturing industry consciences of most Aussie governments since John Curtin was martyred to the cause and Chif was sold a pup by the giant American General.

    But how effective is the NRMA since the costly blight of privatisation?

    On ABC Radio National today, December 6, the AAA was firm and decisive
    in speaking out to support the European diesel car as a useful alternative
    but had faint praise for the scant couple of trendy Californian inspired petrol-electric hybrids currently marketed, aimed at the swirling fog of
    congestion bound city motorists who would be better served with decent
    public transport.

    The AAA confirmed views expressed in these columns thaat although expensive and ‘politically correct’ cars like the Prius were more a waste
    of R&D resources while the greater need for proper energy alternatives
    was not being served.

    It’s a valid comment here that LPG container exports out of West Australia
    land the fuel at a fraction of the price imposed on Australians.

    Again, no matter what the guilt of collusion and conspiracy by the obese and now completely overseas owned oil companies, there is a genuine need for an honest Federal Government to do a serious sight more than merely “examine” the bowser price of petrol here in Oz.

    Now, with a push perhaps to recapture Telstra, to buy it back from Rupert Murdoch, is there a snowball’s chance we might hope to buy back AMPOL and WAPET ?

    With local industry and dinkum Federal Government response we might at
    least bring our bowser costs back to a closer measure with parity.

    And if the Chinese and the Koreans really need our LPG to make inferior
    motor vehicles, cameras, TV sets and imitation Bonds athletics, then they
    surely have sufficient people there to consume it all while we get on with
    re-establishing manufacture, some sort of automobile industry, and most of all deferring rightly a reasonable portion of what we own and produce for our own motorists, small businesses, transport.

    Perhaps then LPG would, through independent servos, garages, be
    bowser priced with decent profit margins still at 20 to 30 cpl, and thereby
    be efficiently piped and carted into the dinkum bush areas for regional and rural consumers.

    But this would mean an end to the Federal tax bonanza on petrol and diesel as well, bringing the cost of petrol and diesel fuel here back to a much more honest 70 or so cents a litre.

    On the other hand, would Canberra dare upset George Bush’s family Texas oil company and the Dutch oil interests in Australia by getting a
    fairer deal for the Aussie motorist on our own fossil fuel reserves?

    - TDB

  7. Contact, harangue and harrass both your local and federal MP’s. LPG is a great, cheaper all round winner for the conumer,environment and the community.

    But just watch those greedy politicans getting their claws in and dragging up the LPG excises to make it in the end non worthwhile to convert.

    I feel good refuelling on LPG. It helps me do my little bit for the environment with little effort and at a cost saving to me and my family.

    Tom C.

  8. I applaud the NRMA for it’s fight to keep petrol prices at a reasonable level. However that’s only part of the problem. Why is diesel more expensive than petrol and why has LPG shot up so much.

    Australia has vast supplies of gas which we ship off to China for a pittance while we must pay 70 cents per litre.

    Of all the alternate fuels available, gas represents the single most immediate, available and environmentally friendly. The new Federal Government has no environmental credentials at all if it doesn’t do something to promote the increased use of this fuel sourse.

    Any vehicle that runs on petrol can run on gas. It should be the norm for vehicles to run on gas not the exception.

      • Your not quite convinced are you?
        Small motor can run on lpg it’s just not as economically viable as the fuel consumption is quite low to start with. I run lpg on a mitsubishi verada it’s consumption is about 3l more per 100km but the savings are well worth it

        • As stated elsewhere, I’ve got my 7.5kva generator running on lpg.
          Never a problem and about half the cost.
          Next stop: hydrogen.

  9. Does anyone have a Toyota RAV 4 (4 cylinder cruiser model) which is running on LPG? Am currently thinking about purchasing a 2007 rav4 and have a conversion quote for $3600. I have heard different stories about whether or not the conversion will cause any engine problems.

    My wife and I were thinking about the Subaru Outback but according to Subaru their vehicles are not suitable for LPG conversion.

    According to the company that has quoted $3600 for LPG conversion their past kits never worked on the Rav 4 (kept blowing the converters) but only now have they developed a kit that has been “approved” for use.

    I am sceptical about this “new” kit.

  10. So the environment is another winner??? Only 1.5 kg CO2 per litre vs 2.3 kg from petrol, and what greater authority is there than the Australian Government Department of Climate Change.

    But hang on. What were the figures for fuel consumption for a Commodore?

    10.9 litres of petrol @ 2.3 kg/litre = 25.07 kg CO2 per 100 km

    16 litres of LPG @ 1.5 kg/litre = 24 kg CO2 per 100 km

    4% saving but reduced vehicle performance. Perhaps just back off in the petrol commodore for the same environmental effect. Disgraceful that green Government offices are populated by non scientists blind to either mathematics or the truth.

    No arguments about the economy of LPG in a distorted market where world parity economic arguments only apply to petrol and even the capital cost of the LPG alternative is subsidised.

  11. I have a 2001 Pajero recently converted to LPG with vapour injection system. It uses about 15% more LPG then petrol, has no power drop and by my calculations produces 25% less CO2. Enviroment wise LPG is better then petrol and probable equal to deisel. Cost wise with the $2000 grant there is no comparison.

  12. Re. Garry White
    “Disgraceful that green Government offices are populated by non scientists blind to either mathematics or the truth.”

    The math that you displayed in your post indicates that LPG has an average saving of 1kg/100km of CO2. I don’t understand how this could not be a benefit.

    That could potentially lead to an average saving of 70 000kg/100km for the 70 000 conversions performed when the government offered the LPG conversion rebate.

  13. Gary White: ’4% saving but reduced vehicle performance. Perhaps just back off in the petrol commodore for the same environmental effect. ”

    Or get LPG and an back off on it for double the effect.

    A saving isn’t a non-saving just because you can get it another way. A 4% saving in CO2 isn’t nothing.

    Regarding the rest of the conversation, I wouldn’t go back to petrol with the amount i save on LPG. The one major annoyance for me is that I cannot insure my car for it’s true market value. Even though LPG can add $800-1000 to the value on the market (from my experience in searching for a replacement second car), insurers will count it as a non-standard extra and refuse to insure it’s value.

  14. Hi guys,

    I just bought a 1990 V6 3.8L VN Holden Commodore, read through whats been said on here but just want to get some straight answers, stats if possible and a few questions answered.

    1) Does LPG cause any problems to the engine if i still use Petrol from time to time with it like switching here and there?

    2) What type of injection system would my car require if i add LPG to the engine system? Just the usual one on any other car?

    3) During a car crash does the LPG tank pose a serious problem? Like Everyone has petrol, but is there a bigger hazard wid LPG?

    Reason for wanting to convert.
    63L Petrol Tank – 590km worth @ $91.35 ($1.45/L) – 15.4cents/km
    63L LPG Tank – 390km worth @ $40.95 (65c/L) – 9.5cents/km

    thanks to anyone who replies helpin me. =)

  15. I recently had a VT commodore 5 speed converted to duel fuel and find it runs better on gas than petrol especially while the engine is cold. After the rebate it cost me $400. Performance on petrol seems slightly down on before but on gas is about the same as before conversion. Weekly cost for fuel is half of previous and better than a friends Astra 1.8. As you can see there is no disadvantage in the driving. Haven’t been on a trip yet but taxi owner next door says economy is much better on a trip and not far behind petrol.

  16. You say “expect a 20-30 per cent increase in gas consumption over petrol per kilometre” and then quote a 47% increase for a Commodore. What’s an example of a car which is in the 20-30% range?

  17. in 1995 i drove from brisbane to melbourne and return in a 5lt v8 panelvan on gas . my inlaws did the same in a gemini 1.6 lt. after we added all our receipts my total fuel bill was 1dollar more than a 4cylnder.

    lpg was almost a third the price of petrol now its well over half the price .
    oil companies are cashing in because they can . because you let them
    i no longer support big brand servos . i allways use the united servo , its 10km out of my way but i save upto 10 cents a litre .
    boycot the big names when ever you can and when your driving past 6 servos to get to a cheaper one say “take that you bastards” as you drive past

  18. Earlier this year I had a 2004 3.8L V6 VY Commodore converted to LPG (dual fuel). Best decision ever. No noticeable loss of power (let’s face it, it’s not exactly short of kw to play with) and it prefers the LPG to petrol now – runs smooth as. Uses 12L/100 on petrol, about 16/L100 on LPG around town – much better on long trips. Current prices in Canberra $1.599 ULP, $0.569 LPG. Cost of conversion was $3200 – $2000 = $1200. It’s a no-brainer. Conversion cost almost paid off already. Duty doesn’t start until 2011 (2.5c/L) and then will reach a max of 12.5c/L by 2015. Compare this to duty on ULP of 38c/L. What do you reckon the price of ULP will be in 2015…..?

  19. How can you find out if your car is suitable for conversion? We’ve got a 2000 manual holden vectra? My first enquiry was and answered with ‘no, we don’t do those, too many problems’ with no reason for the problems (it was the receptionist calling me back so she couldn’t help).

    So how do you find out if you can/can’t get it done?

    • Holden Vectra is problematic as it is. It has engine problems. Not a reliable car. What they meant was it has issues in petrol. when you convert into LPG it is going to push its limits. It has regular faults with the cam sensor. And it is notoriously famous for that. That is why the mechanics doesn’t like to take risks on a Vectra unless Holden solves that factory born issue

  20. Pingback: The Thursday Where I Learned More About LPG | famouschris.com

  21. I understand that the Federal Government is selling our LPG for 5 cents / litre, the federal politician that sold our gas for this price should be held for treason, I wonder if he has been paid off some how,
    Questions: When does this contract end
    What would be the price the federal goverment will be selling the LPG to China after the contract will expire, Can noirmal people power stop the sale is it possible
    Can the Federal Governement sell the LPG at the Aussie pump price.to overseas then the Chinese would be paying what the supply is actual worth and hopefully save our aliening economy as this will put the prices worldwide up, for goods we all use – but hey, it may just start kicking off manufacturing in Australia again.

    please enlightnen me

  22. Who do you think owns the gas companys? They don’t have the same op names but there all owned by the same **** companies as the oil ****. The only way to break away from these leachers is to go to another energy. & thats battry elect.
    Loby your reps {local,stat,federal.} We all must go to power.
    I’m sure they don’t own ower power stations.{yet}
    S M C

  23. I had my 1986 Toyota HiAce van converted to LPG at the end of last April. I retained the ability to use petrol yet fit the LPG tank under the cargo floor by having the petrol tank cut in half. The spare tyre is now carried in the cargo area. The van had 250,000km on it when converted.

    This HiAce being an older vehicle with a carburettor and breaker point ignition, a gas converter/venturi plate LPG system was used. This is not the most efficient LPG induction system but without an engine control computer, it was not possible to install one of the new liquid-phase LPG injection systems. Liquid injection systems do much better both on power and efficiency compared to petrol and switch seamlessly between fuels.

    I now have 4700km logged post-conversion. The van goes 11.5L/100km on petrol and 14L/100km on LPG. The old style venturi LPG system yields a 17.8% increase in km per litre fuel use on LPG, not quite the 20-30% increase noted in the post. However, with non-computerised ignition systems, the engine can be tuned for best performance either on LPG or on petrol but performance will suffer on the disfavoured fuel unless the engine is retuned.

    I have tuned my dinosaur’s engine for LPG. I installed one heat-range colder spark plugs, upgraded the plug wires to heavy-duty silicone type and advanced the timing by 5 degrees. The fuel economy and performance on petrol is now not as good as it was before tuning for LPG and the tuning can’t be changed at the flip of a switch like it can with the new LPG injection systems. Consequently, now tuned for LPG, the van runs better on LPG than it does on petrol but can still use petrol just in the rare case I can’t get LPG. Most of my driving is within Sydney so LPG availability is not a problem. Since tuning for LPG, the van has about the same performance on gas as it did when on petrol only.

    When converting older vehicles to LPG, it is important to consider what sort of valve seats are installed in the cylinder head. If the vehicle is designed for unleaded petrol and has hardened valve seats (as do most if not all vehicles sold in Aus in 1986 and after), it will run on LPG with no maintenance considerations vs ULP. When running on LPG, the motor oil does not turn black with abrasive carbon particulates as it did from poorly combusted petrol. However, LPG combustion has some acidic byproducts which can get into motor oil. LPG specific motor oils, particularly synthetics, combat this problem. It is still a much cleaner burning fuel than petrol, especially important in old vehicles like this HiAce which may be able to run on ULP but which don’t have a catalytic converter.

    At the end of the day, I now spend 55% less on fuel per km. It’s about 17.1c/km on petrol and around 8c/km on LPG. In 4700km over two-and-a-bit months, I have saved more than $500 as opposed to petrol. The installation cost $3000 and I got back $2000 on the LPG subsidy scheme, so I was $1000 out of pocket. The installation cost has now been 50% repaid in savings, in a rather brief period. Wish I’d done it years ago.

  24. Petrol is imported.
    Oil Peak has been reached, so petrol is only going to get more expensive.
    LPG is better for the environment
    We have an abundant supply just off Bass Straight
    If oil producing countries are able to sell petrol to its nationals cheaper, why can’t we?
    I understand it’s sold to China for 2c per litre.
    Why are we being slugged more, with ongoing raising of excise?
    Wouldn’t it be a viable option short term? 20-40 years until a true alternative is found.

  25. Any one can tell me if 2005 Holden VZ Commodore Executive is suitable for LPG.

    and what is the installation cost?

    sos~~~~~ sos

  26. My 2006 XT pulls a van , all up about 1500kg & on gas it’s a GAS! The only way to keep on travellin’…going up long inclines we switch to petrol; but otherwise it’s theonly way to enjoy a long, cheap holiday with a caravan.

  27. Isnt it time this foolish $2000 rebate for lpg was abolished. It was only introduced by the Howard government to be seen to be doing something about petrol prices.
    Environmentally its a disaster. Paying the capital costs for people to convert to a much cheaper fuel? We all know the effect of making fuel cheaper: people will continue to drive larger vehicles and/or drive the same and/or larger distances. One thing for sure it is not going to encourage anyone to drive less. As has been mentioned previously in the thread, the small reduction in CO2 emissions per km travelled will be meaningless if the total amount of fuel burnt increases.
    Really, giving people $2K to convert their new territory to make it cheaper to create more emissions, hardly supporting the aussie battler is it.

    • it’s a cleaner burning fuel,especially for cold the start short trips many people do; it’s a fuel Australia is self-sufficient in;allows for longer service intervals as it doesn’t get into the oil like petrol,thus less oil use needed over the life of an engine-just a few examples why gas is superior to petrol and should be encouraged by the government…

  28. My car: Mercedes 300d diesel. Noisy, slow, efficient.

    After reading this thread and considering the:

    -possibility of lower engine reliability/life
    -Lower or close to the same engine power
    -almost meaningless difference in emmisions (4%)
    -no guarentee of future prices past 2015
    -extra veichle weight
    -enough said?

    We already have electric cars and hybrids and they are better short and long term solutions for road transportaion.

    Plus, why arnt you driving a diesel? Your car is a 4cyl/v6/v8 petrol/gas? Can you afford the luxury? So what your car is faster?

    The diesels were popular in the last oil crisis, and their still here now as an answer to emissions, range, fuel consumption & now power.

    Until electrics, go to diesel.

    • On diesel (and hybrids, which ARE impressive) you’re STILL dependent on governments and the industry. A couple of young blokes down the road from me have just logged 2 MILLION km. (in a Falcon and a 30cwt International) on hydrogen.
      They fill their tank with water, and the only problem is water contaminating the oil, which requires more oil changes.
      Not nearly as much power as petrol, of course, but at the price I wouldn’t complain about not getting off the lights first.

  29. It’s great that David bought up diesel. Particulates from diesel are known to cause cancer as well as lots of smog. Newer vehicles have particulate filter, which addresses this issue, but they only represent a small number vehicles on the road at this stage. On top of that, the Government tax on diesel is ridiculous. The original concept for the diesel was the ‘peoples engine’ which would run on a wide range of basic fuels; unfortunately the new ‘efficient’ diesel engines are very fussy with their fuel :-(

    If you want to talk about emission and LPG, why not look at the full story. Yes, LPG emits less CO2 compared to an equivalent ULP vehicle, and 4% is significant. All the press and industry talk about is CO2, however if take the time to look deeper there are other significant benefits.

    LPG produces 80% less (yes that’s 1/5) toxic emissions compares to a ULP vehicle. It also produces way less particulate (yes ULP produces particulate – look at the black on the inside of your exhaust pipe! I would argue that toxic and particulate emissions are also a significant part of the equation.

    I just bought a new car, and favoured a diesel until I looked into it in detail – ended up buying LPG!

  30. Quoting:
    “# commsir Says:
    September 1st, 2008 at 12:48 pm

    Isnt it time this foolish $2000 rebate for lpg was abolished. It was only introduced by the Howard government to be seen to be doing something about petrol prices.
    Environmentally its a disaster. Paying the capital costs for people to convert to a much cheaper fuel? We all know the effect of making fuel cheaper: people will continue to drive larger vehicles and/or drive the same and/or larger distances. One thing for sure it is not going to encourage anyone to drive less. As has been mentioned previously in the thread, the small reduction in CO2 emissions per km travelled will be meaningless if the total amount of fuel burnt increases.
    Really, giving people $2K to convert their new territory to make it cheaper to create more emissions, hardly supporting the aussie battler is it.”

    Regarding the above mentioned comment;
    Remember, people come first. What makes Australia such a great country to live in as opposed to Europe for example, is that the average person here can afford a car and enjoy the associated freedoms that goes with it.
    If LPG is there to help preserve that freedom then it is a worty cause.

  31. If you have a Nissan Pathfinder (2005) or later, don’t convert to LPG!!!! We went to a reputable LPG converter and as a consequence, our 3 year old car is deceased (with only 80,000 kms). The engine has been destroyed as a result of the conversion.

    I first complained that it never felt right the day after I collected it but everyone said that was normal. I took my car back several times to be checked but no problems were detected. The catalytic converter had to replaced 2 weeks ago. But that didn’t fix the problems. 2 days later, I noticed smoke from my exhaust. I hauled it back to the mechanic and as a consequence, was told that my engine was dead. He is now claiming that Nissan Pathfinders are not particularly good for converting to gas, given the location of the catalytic converters. It’s a pity he didn’t think of that before he did the $4,500 conversion. My husband and I are furious with the mechanic and are hopeful of resolving the matter – given that he destroyed our engine with the conversion.

    So for anyone thinking of converting to LPG – think again!!!! Buy something economical instead – I know I will when this mess is sorted out.

    • I have a 2002 Nissan Pathfinder. I converted it to LPG at about 80,000km.. It has now done over 200,000km and still drives like new. It does not burn any oil and the oil is always clean. It runs on both LPG and Petrol. Tip. Run regurally on petrol so your computer knows how to run on petrol. Use high octane petrol as it cleans the injectors. I love LPG but I hate the bastards who have inflated the price to .80c a litre in Brisbane. Excise has been added at 2.5c a litre and the pice has gone up about .20c a litre. People are so STUPID . They have the power to stop this if everyone would boycott one brand name for a period of time and cut off thier revenue the price would come down. However the oil companys are much smarter than us dump idiots who buy the stuff.

      • lpg has gone from 55cpl before christmas to 89.9cpl now. it even went up 10cpl over night. you cant tell me every gas tank at every servo over night. how stupid do they think we are. the oil companies fit right in with polotions, liars and thieves. murray you are right. boycot the big oil companies and go to the independants. i found one in Gumdale

      • My 2001 Pathfinder converted at 150,000 km, now done 350,000 km, regularly tows a caravan. No noticeable power loss & travel for 1/2 the price. Use long life plugs & keep oil filter changed .Exhaust is clean & oil still golden,

  32. My first LPG car was purchased in 1988, a 2nd hand XC Falcon ($4000) that took our family of six (I had a seat for one of the kids fitted between the two front seats) to holidays in SA, VIC and QLD until I got a company car in 1993. I next had an LPG Nissan Patrol in 2000 and last year traded it on a new Toyota Hi-Ace with LPG. I’m just about to get a second car (Toyota Tarago) on LPG. The only downside in using LPG for the last 20years has been the slow rollout of LPG service stations in NSW. Unlike the unfortunate person in the previous blog, I haven’t had any mechanical issues with my vehicles and I predict that I have done over 500,000kms using LPG. FYI, when I first started using LPG in ’88 it was 30c. per litre in Sydney and 22c. per litre in Melbourne! Victoria was way ahead of NSW in LPG usage in the eighties. Modern LPG systems use gas injection similar to fuel injection and the Hi-Ace and Tarago start on ULP and automatically change over when the engine has run for approximately 2 minutes. They tell me that this helps the engine to start and run smoothly.

  33. Hi guys good reading here I purchased a 60th anniversary dual fuel Holden commodore and what can i say $8.00 to do 100k’s on lpg yet petrol $12 or $13 I see the savings I brought the car and hoolden charged $2400 for the gas conversen which was fitted by HSV in Melbourne then was able to claim the $2000 rebate federal then $1000 state rebate so made $600. Good score I know the best is driving it around town on lpg its about 14-15litres per 100 k’s but on the open road about 9-10litres. Petrol around town about 11-12 litres per 100′ks and open road around the same as lpg 9-10 litres so there are some big savings there is also the option availble where you dont even run the car on fue

  34. Nicole Simmonds Says:

    November 4th, 2008 at 3:13 pm

    Hi All Nicole said about her Nissan I presume it was a 4 litre v 6 I had heard that the catalytic converters by Nissan needed to be replaced with stainless units & moved further away from the exhaust manifold otherwise they cause engine damage any info appreciated I am about to put lpg on our navara d40 4.0 v6 HELP INFO PLEASE

  35. LPG is the go, 2004 commodore VY ser 2 v6, the best decision I have ever made, the rebate only put up the cost of conversion. I missed out on it by 6 months but my conversion was still cheaper than after the rebate.
    It has paid for itself 3.5 times in 2.5 years. Oil companies can go sing for the petrol price savings I have made, they are not getting my money for petrol again.
    We are paying GST on LPG and the govt wants more in excise (TAX).
    We are being ripped off with the price by about 30c PL as of today. Don’t be fooled by the supposed low price.
    The NRMA needs to do more about fuel prices in general. Ethanol is a joke, the price will never be low enough and the saving from it cannot be justified by the industry yet.
    Diesel will always be regarded as a tax income for the gov’t. it is artificially taxed in the name of clean air. What rot, anybody who believes that the TAXES on fuel are for the long term benefit of the environment are having themselves on.

  36. Lets look at the facts people

    Hybrid = you have to drive like a miser (ie no a/c) and only run around the city to get the benefits… and lets face it how much for a battery pack after 8 years? also the generator is the gearbox on these cars so when the gearbox wears out how much to fix?

    CRDi=very fussy about the diesel you feed it..i act our diesel is still substandard compared to the european standards…the oil you use to lubricate it is at least about $70 a pop (the diesel 4wd’s use about 10lt or $140)..oh and particulates are still very high in these engines.. another point diesel engine 7lt/100km@$1.40/lt=13.7c/km vs 12lt/100km@$1.15/lt=13.8c/km so while it is $1/1000km cheaper for a diesel the servicing costs are almost doubled and its gonna take along time if ever to pay off the $10000 premium that diesel cars sales command

    ULP=not good for engines use PULP and you get longer sevice life…dont believe me ask a couple of mechanics see what they say

    Fuel Cell= why do NASA’s cells work off hydrogen and oxygen yet the manufacturers are steering towards methanol?

    Electric Cars=limited range, best batteries to date are LiFePo-4 but they are ridiculously expensive(approx $50000 for a range of 250km) oh and when the battery goes flat it’ll take about 16hrs to fully charge with the last 20% taking most of that time…too bad if you need to be somewhere

    Hydrogen= is Colourless, odourless,and tasteless, and does anyone remember the Hindenburg? not to mention hydrogen causes metal fatigue which causes stress fractures in metals that come in contact with it, it requires very high storage pressures, is not very energy dense, and requires more energy to liberate it in an environmentally friendly way than it contains

    LPG=Its cheap, extends the vehicle life if the system is fitted correctly, if not you need to fix the motor, can be fitted to any ULP engine, and can be added to older diesels at 30% to improve economy, power, and engine life,is quite widely available these days and in WA you get $3000 in grants to fit LPG so a system costs $200 for a fumigation system (15-30% higher consumption, risk of backfire, minor power loss), $1500 for VSi (5-15% higher consumption, negligable loss of power, ability to use both fuels with out tweaking) so to use the fuel economies of 13.7c/km for a CRDi and 13.8c/km for a petrol equivalent the same petrol engine fitted with a VSi system would be at a worst case(+15%) 13.8Lt/100Km@$0.60/Lt=8.2c/km
    with only a marginal increase in cost for servicing(ie plugs need changing more regularly)

    and to all you conspiracy theorist (terrorists) please jump to this link and read all about the LPG price cycle and the SACP


    LPG has been excise free or the sole purpose of developing the industry

    the LPG grants have been good for the LPG industry because it has helped introduce new technologies (VSi, Direct Liquid injection)

    If you hate paying taxes then dont speed, or even drive for that matter
    and if you still do then next time you go to the doctor after a MVA and dont pay anything ask yourself how do they pay for it all…

    My 02 TJ Magna fitted with a Romano VSi system gets 12L/100km on LPG as opposed to 10.5l/100km on PULP, is smoother, stronger, and just as quick off the line upto 100km/h, and im yet to try it out on the 1/4 mile

  37. I’ve always owned duel fuel cars and enjoyed the savings. They were all older cars (<1994) and they only used ~30% more L/km than petrol. I recently purchased a Mitsubishi Solara 2001 and the petrol efficiency was 6 – 8L/100km. After converting to LPG I was appalled to find that the LPG efficiency is 12 – 16L/100km! It costs more to run on LPG than petrol! No monetary savings and no environmental impact savings!

    Should I expect better from the conversion? I thought the efficiency was proportionate to the petrol efficiency. Is this false?

  38. i’d say you’ve got another problem…although judging by the figures you’ve provided would i be right in presuming your a lead foot and or get stuck in slow traffic?…whats your av speed?

    check your plugs, exhaust, air filter, and tyre pressures, use a 10w30 oil, and change your trans fluid then see what you get outta your car on gas and petrol… also a K&N air filter, extractors, and lukey rear muffler make a huge difference to your fuel economy

  39. Thanks very much for the tips.

    Not a lead foot. Practicly hypermiler. 6L/100km is very good anybody’s book right? Petrol = 6L/100km, LPG = 12L/100km. These figures were both obtained by making the same 450km trip, average speed = ~90km/h and don’t exceed 105km/h.

    Petrol consumed ~27L therefore: 27L / (450km/100) = 6L/100km
    LPG consumed ~54L therefore: 54L / (450km/100) = 12L/100km

    These results have been confirmed over 5 months of driving on petrol and several long trips on LPG totaling ~ 3000km.

  40. I live in a small city with no traffic to get stuck in. No traffic lights.

    What other problem might I have? I looked at the conversion and it looks pretty basic. Theres a small chamber(?) which uses the hot water from the radiater to vapourise the LPG. There is a copper inlet from the tank and a woven outlet to a solinoid which is electronicly controlled by a small black box which apparently translates the injection information. It’s a single input into the engine. Sorry about the incorect terminology. I’m not a mechanic.

  41. the best ive heard of in a magna (TE 3.5) was 5L/100km on a trip from perth to denmark (good flat roads) after i convinced the owner to leave the car with me and i tore thru it and performed one of my major services
    (ALL fluids, filters, plugs and intake system clean)

    do you ever smell gas? i ask because soon after my conversion was carried out i could occasionally smell gas when driving and also when i shut off the engine.

    i did some investigation and found that the inlet pipe to the convertor was poorly flared and leaking gas.

    my economy was 200km/46lt=4.3km/lt or 20l/100km

    just got back from a week in busselton
    during that trip i recorded 400km/46lt@av80km/h:8.7km/lt or 11.5l/100km with peak speeds of upto 110km/h (90-100km/h being the most economical speeds) and the a/c on all in hilly terrain

    without the a/c on,not exceeding 100km/h and on more level terrain i reckon 8l/100km could be reached.

    things ive noticed are that while cruising the fuel economy is good but acceleration uses fuel much heavier than petrol.

    the black box is the control unit, it should have a tacho connection and an O2 sensor connection, and may have some LEDs to show the mixture lambda.

    who fitted the system? perhaps you should take it to another gas fitter for a second opinion

    another good resource i stumbled upon is:


  42. just a thought but you may have picked up some dirty gas soon after the conversion (or even during) and that has clogged your convertor resulting in poor fuel economy

  43. Pingback: Lpg Cng Components manufacturer’s blog » Blog Archive » LPG vs. Petrol

  44. i would just like to say to everybody, LPG is a great alternative fuel for diesel and petrol engines, i just had my 1986 RB Gemini converted to Gas, it has a little bit of a power loss on gas, it used to get 7.5L per 100 Km on Petrol, it now gets about 8L per 100Km a Gas, it idles smoother on LPG, i get 800 Kms to a tank. also to say to anybody whos considering converter smaller cars to LPG, the guy who converterd my car to gas did a guys Mazda 121, its got a 50 L Gas tank and it gets 1100 Kms to a tank!

  45. i’ve seen an old 92 excel pulling those figures
    and with toriodal tanks its more than feasable nowdays

  46. Sod the environment, I converted to save $.

    I have a 2008 model Prado. I choose to convert to LPG at a cost of $4,200 for the latest SVI system ($2,200 after the $2,000 rebate). I have a car allowance through my work and could not afford the HUGE price I was paying for petrol.

    When petrol prices were nudging $1.50/ltr (even for E10) I was paying $160.00 per week for petrol! Once I converted that dropped to $50.00! I now get 11km/ltr (lots of hwy driving) compared to 10.6km/ltr on petrol. (Not be fooled by stats supplied by people that do not use LPG)

    The power drop was zero. The company that converted my car put it on the Dyno to ensure if was tuned correctly. I check my oil monthly and it always looks brand new. Even 1 day before a service. Services have been pushed out from every 10,000 to every 15,000 as the oil stays cleaner (another saving).

    My prado has now done 70,000kms (40,000 on LPG) with no issues at all. Now prices have come down I pay around $30.00 to fill up (rather than around $84.00 for petrol based on this mornings price). and have the benefit of duel fuel if need be.

    If you are thinking about converting but not sure, just do it. You will save heaps regardless of using slightly more gas. Just buy the best system you can afford. I had the $2,200 (after rebate) paid off in just 5 months!


  47. Hello,

    I have a 1995 Tarago which was converted to gas recently. It was orginally converted with the venturi system but the van would often cut out or stutter while driving. I rang around and found it was not suitable for venturi so I had the installer upgrade to gas injection. It is much better but still “stutters” on acceleration and decceleration at times- it is still not suitable for driving on gas. The installer has looked at it many times, changed spark plugs etc, but it is still not right. Does anyone have any suggestions or know if the 1990s wide body tarago’s are actually suitable for gas?


  48. I am still amazed by all the urban myths that people still believe. If santa ran his slay on LPGas @ 5cpl he would be able to afford much more expensive presents. Does any one really believe that LPGas is sold by the Federal Government. If so which brand is it and who did the deal i want some of that to sell. Sequential Vapour and Liquid injection LPGas systems have been around for a few years now and the efficiency is sensational. LPGas has only got on to 2% of cars and trucks in Australia at best, but it does help to offset CO2 and the short comings of petrol its safe its powerful its greener and is certainly here to stay. LPGas is set to help provide a solution to global warming as it now delivers almost the same economy as petrol litre to litre, with the added bonus of saving over 50% of $ in the hip pocket. People who are eligable to get the $1750.00 grant relise their investment in less than $20,000k’s on the average 4-6 cylinder cars. Typically the engine life is doubled if the service intervalls are adheared to.
    With over 480,000 registered conversions 250,000 approved grants since 2003 their is real oppotunity for families to enjoy the benefits of LPGas whilst helping the environment.
    Holden first started factory fits in 1991 and Ford followed the lead in 1993-4 since then all the major Australian Car manufactures have had conversions available on a host of different models. with the exception of Nissan who started and got seriously burnt back in 1978 with the 200B.
    LPGas has only just started and with over 15,000,000 conversions world wide it is the sleeping beauty. Bring it on.
    Ron Caloundra

  49. Hi Everyone,
    I recently fitted an Aguar water booster unit to my duel fuel 2000 Toyota Hi-Ace, and was amazed at the results. I was sceptical when a friend told me his car was a different vehicle since fitting the Aguar. He said the power incresed dramatically and his fuel consumption was improved.
    I have to tell you that he was absolutely correct, my van has never had so much oomph, and I got 419km[best] out of one LPG tankful against 324km[best] pre Aguar. The system is easy to put on, and apparently injects a water vapour into the inlet manifold to cool the air. I’m no expert, but now four of my mates have put these Aguars on their cars and reckon their fantastic. The only drawback is you have to top it up every day. I got mine on Ebay for $198.00 and it was worth every cent.

  50. I am looking to buy a 04 mitsubishi pajero, i have always had diesels but i am considering buying a petrol and converting to gas,can any one tell me what sort of consumption i will get out of gas,i do a lot of highway miles

  51. I have run 5 large cars on lpg over the last few years and several hundred thousand km’s. The benefits are similar to those expressed by others. The acid test for cost benefit of lpg is whether business owners use it. The fact that almost every large car taxi in Australia uses it says something about its commercial viability. Even given the drop in km / litre, the emissions are still reduced by around 20% over the same travelling distance when compared to petrol. When comparing cost per km travelled and emissions released, this rates favourably against hybrid cars especially when you consider the up front cost of the vehicles.
    The government continues to reduce the LPG installation subsidy while promoting photo opportunities like the hybrid Toyota Camry which will sell in small numbers and make little environmental difference at all. If they were serious about emissions reduction, the LPG subsidy would stay, excise on LPG would not be applied and further disincentives to use petrol would be introduced. None of this will happen as Kevin is too interested in self promotion rather than solving the problem.

  52. Hullo,
    I took the advice of Phil Short, and fitted an Aguar water booster unit to my 2007
    LPG Ford Falcon. My fuel consumption was approximately 20% better, but the increase in power was the thing that surprised me. For under $200 this thing will pay for itself in no time and it is so easy to fit and use.
    Like Phil said, to gain the best performance it must be topped up regularly, but as long as it keeps doing whatever it’s doing, I don’t mind the small inconvenience.
    One final note, I ordered my unit over the phone and not via their aguarboost.webs.com website. It arrived within a week and was working the next day.

  53. I have a Toyota Camry V6 engine, 3.0 Litre. I drive mostly in the city (Sydney). I am thinking of installing the LPG fuel system. But i wonder if there is anyone who has installed an LPG on his/her Toyota Camry. Do you think you save money on fuel? or it is pretty much the same. At the moment, i think I spend somewhere around $60 a week on a normal drive. Need to reduce my spending. Would appreciate if someone could give a reply

  54. One of my mates has an Aguar booster unit on his Toyota Camry. It runs on petrol and he reckons he saves about 20% on fuel. He says the extra power is unbelievable.

  55. @marcus Holden and Ford aren’t ‘serious car manufacturers’? That said I agree with you, LPG is not at all a solution to climate change. Bicycles are.

  56. hi my 2001 ford falcon wagon dedicated lpg wagon has major oil leaks
    and some times lags power. Just would like to know should i take
    it to my local mechanic or is it best to get it repaired by a lpg specialist?
    thanks to any answers!

  57. Just wanted to update some facts on the NRMA web site –

    1. There are 700,000 Australian vehicles using LPG not 70,000
    (Source: LPG Industry Report Card 2010)

    2. The LPG consumption example is incorrect. A FG Ford Falcon uses 11.1L/100km on ULP and 14.4L/100km on LPG. (Source: as above)

    3. The excise increase quotes percentages but these should be cents per litre as follows:

    – 1 July 2011 initial excise of 2.5 cents per litre
    – 1 July 2012 excise increases to 5.0 cents per litre
    – 1 July 2013 excise increases to 7.5 cents per litre
    – 1 July 2014 excise increases to 10.0 cents per litre
    – 1 July 2015 excise increases to 12.5 cents per litre

    4. There is no information on government grants for LPG vehicles. At present the following grants are available for LPG installations:

    a. Grants for LPG conversions of registered vehicles:

    Grant Conversion Completed
    $1,500 Between 1 July 2010 and 30 June 2011
    $1,250 Between 1 July 2011 and 30 June 2012
    $1,000 Between 1 July 2012 and 30 June 2013
    $1,000 Between 1 July 2013 and 30 June 2014

    b. Grants for the purchase of new vehicles fitted with LPG before first registration:

    Grant Vehicle Purchase Completed
    $2,000 Between 1 July 2009 and 30 June 2014

    (Source: http://www.ausindustry.gov.au)

  58. I think that it is reprehensible that the Federal Government is going to introduce a fuel excise on LPG. They are already forcing people to use Higher ethanol fuels or else use the more expensive premium fuel (did someone say “in bed with the fuel companies”?). Now the pigs are going to revenue raise on LPG. Is the excise going to Roads? I THINK NOT! LPG Conversion isn’t cheap either so what is this excise going to do to LPG? Its going to screw it isn’t?! Another greed driven bone head idea by the so called champions of the minority group…er environment. We are on a ship of fools that is sinking quickly!

    • I have added a Hydrogen system to my LPG The goverment will not affect my bottom line. and my carbon footprint is greatly reduced.

  59. when will people stop being fooled, lpg maybe greener than petrol, but in terms of CO2 emissions there is basically no difference, you are still putting just as much co2 into the atmosphere as the same car driven on petrol…..except policy is just letting you do it cheaper for the moment, it allows you to put more co2 into the atmosphere for less $, a green fuel it aint

  60. Pingback: No Free Ride « Torbinski's Blog

  61. Purchased a 2004 ba fairlane ex business class then taxi, duel fuel, complete service history/mechanicals/parts replacements…….everything. Has done 740,000, still runs like new, NO PROBLEMS WITH THE GAS SYSTEM, has a 52lt tank, averaged 230klm per tank city driving prior to major service, (which I did myself), now 260. Only issue I have is this……WHAT OIL should I be using…….ppl say keep using 10w 30 just do changes every 10,000klm, other ppl say use 25w 50 and do changes at 30,000. Any help would be appreciated.

    • Do the oil changes every 10000 km If you buy Repco brand oil, oil filter, airfilter there is a massive discount that not many people know about. Total should be around $50-$60

  62. What is this Aquar water booster that people talks about…. I cannot find any info on it anywhere. It is not even on ebay. Can someone tell me if it is a hoax that is being spread about?

  63. LPG vs. Petrol. LPG is cheaper than petrol but petrol is more useful than LPG. In our generation today, petrol is increasing it’s price almost every week so other are using LPG like in their cars. But the only question is “Is the LPG is safe to use in my car ?”. But overall, these 2 can be useful in our everyday life.

  64. LPG vs Petrol. Yes there are norms while using LPG in your vehicle use the safety measurement of LPG fitted cylinder car. While using LPG your also helping the environment to have clean air and save money.

  65. I am a courier and travel 400km + per day.Ihave always had LPG powered Toyotas in one form or another. My savings per day as compared with the petrol driving companions over a months period would be $20-$25 . $100-$120 /wk.The thing that most people overlook with LPG is the oil. Dip an LPG driven vehicle and look at the oil on the stick it is almost clear. Do the same to a petrol vehicle it is black. The wear factor on a petrol motor is huge. I was in charge of a fleet of toyotas. One driver had his hiace for over 8 yrs with 780,000 km and never touched the engine, apart fron the obvious clutch, brakes etc that fail. My last van had over600,000km and only retired after a crash. My latest ute 390,000 still with great compression and no sign of any engine wear.

  66. I have had lpg on a 6 cylinder Falcon for the last 4 years. In winter 2011  my cost per 100 klms was $10.76.  I recently have changed to an older model 1.6ltr carburetor Corolla and have been staggered at the cost of running a car on petrol. The Corolla on E10 petrol is costing me $16.31. When the $2000 gov rebate was on NRMA was still a  sceptic of Joe public using lpg. I thought a strange position to take when the NRMA runs most of its fleet on Lpg. An NRMA serviceman told me they do it purely for the huge cost saving benefit. I will be selling my Corolla and getting back into a bigger and more comfortable lpg car that is cheaper to run than my old Corolla. 

  67. I bought a 2000 Toyota Prado Petrol V6 Automatic recently. The Odo is 220k km It really runs well and we love it. But the downside is the petrol consumption and you know…

    Now I consider to convert it to LPG. I read quite a few thread in website and it looks that conversion is worthwhile. However, my mechanic told me that he doesn’t recommend me to convert it. He said 11 years old engine is prone to damage after the conversion. New car is OK.

    Have anyone converted an old car(10 years above)? Or someone found problems after converting a Prado from petrol to LPG?

    You comment is appreciated.


  68. Ive got a fairmont with 230,000 km and I am considering putting lpg. I understand the current government rebate of $1250 is limited to 25,000 per year. Any idea if that sort of number is funded by say December?

  69. I’ve got a VT Commodore and I’m averaging 35,000 Km’s p/year. Anyone know what kind of savings I can expect changing over to LPG, ex-rebate?

  70. I purchesed my VS commodore (1997 model) 3 years ago with 175,000kms on it. Converted to LPG straight away, after the $2000 rebate I was $225 out of pocket I had the conversion done cheap as they used a second hand gas tank, that had been tested and tagged for another 10 years use. the conversion also included a FlashLube kit.

    FlashLube is probably a good idea for anyone concerned about damaging their engine. I cannot find much info about long term flash lube use and proof of its claims, but for the price I’m not going to take the risk. It is a valve & upper cylinder lubricant. These are susposed to be the areas of the engine that wear out due to gas.

    My car now has 289,000kms on it with no major issues. Runs perfectly on gas, I also have been running straight gas, no petrol at all. my conversion lets me start on gas, the petrol pump is disconnected in the car.

    So costs for the last 100,000kms

    Flash Lube $150 approx
    changed spark plugs 3 times $75 approx
    changed leads 2 times $100 approx

    so total extra maintenance cost me about $325 as i did the labour myself.
    Also most of the driving I am towing about 1000kgs. my fuel use is very high approx 25L/100km on gas. when the car was on petrol the fuel use was approx 20L/100km

    Price of petrol approx $1.40 price of gas approx $0.52.

    As you can see the amount of fuel I use is very high and if i had to purchase petrol I would have to change jobs. In the financial year of 09-10 I calculated that I had saved approx $6000 in fuel bills by being on gas. Theres the savings right there. Also I have never had the gas serviced and it still works perfectly.

  71. i have a ford maverick on gas, it only has a 70l gas tank and 70l fuel,
    my consumption is the same. around 200klms per tank. yes it is a heavy car kerb weight is just under 3tonnes. it is heavy on the consumption but it is cheap to fill,
    it has just clocked up 400,000 and its done the head gasket,
    to replace the head gasket and head work is on the $1000 mark without labour,
    ive been told that gas burns dry and expels extra heat, causing the valves and valve seats to wear faster.
    has anyone else heard of this?

    after this little expense i think i will run an upper cylinder additive.

  72. I have a Toyota Rav4, I am considering to convert to LPG. does any know about LPG tanks installed undereth the boot where I have large space which I never used since last 1 year.

  73. My VY commodre runs on LPG never had a problem costs about $48.00 to run to Adelaide petrol would cost about $90.00 that was last week our LPG in Lincoln last week cost 53.90 cpl this week 89.90 cpl. Why is this so, because the federal gov has just lobbed another excise on LPG.Julia loves to tax people, so if your thinking of changing to LPG think hard about it, while this tax grabbing gov is in power any thing can happen, although you would think with all the talk about climate change one would think the gov would do anything to get as much transport on LPG as they can, then again maybe they have and now its time to rake in the dollars!!!

  74. hi I live in Vic in the last 3 months lpg has gone from 55c to 87c per L , I’m starting to think is it worth now using petrol again at 1.35 per L .Its a joke why the big spike on lpg , it once was a waste product now they making a huge profit out of it give us family a fair go.Lpg they say it half the price not no more , to keep your lpg running right on ya car its just not worth it no more.

  75. I calculated that the break even point in pertol/lpg prices are around $1.50/85c. In Charlestown, we are now paying 89.9c per litre of LPG and around $1.50 for petrol. We recently blew the engine of our nissan xtrail due to the failure of the catalytic converter (LPG system), with about $ 5000 of repair costs. saving money?! i feel like a fool and asking the mechanic to remove the LPG system completely. Is the LPG prices ever going to come down again? This has been a serious waste of time and money for us. Not happy at all! Cant the government at least say something about the LPG prices after investing money into it?

  76. Hi my name is sam and Im a plumber and doing repair and emergency work in the northern suburbs of adeliade.I have a 2 year old van and it is on lpg .The price of the gas has gone through the roof.Customers dont need to be paying anymore but how can the business run when when ist nearly 90c a litre now.It looks like its one of those rebait gov. scams.But you dont get a rebate on business cars.How has voted for labour.Im going to have to charge more for the first hour.But we are in a economic down turn and people are loosing jobs.I paid $4400 to make the business run cheaper,but should i even use gas anymore.will ther be a gov. scam on solar elec. in the future?

  77. Have either the NRMA or RACV approached the government for an explanation on the disparate and unjustified increases? Where is fuel watch? My understanding was that excise (tax) went up by 5%. That’s a hell of a lot less than the increases we’re seeing at the bowser. Come on motoring association be the voice you’re supposed to be!

  78. Dont waste your time 1.00 a litre.Did my ford territory a couple of years ago not even worth running it now.Waste of money

  79. I drive a 1975 Holden Statesman 5.0l that runs on dedicated gas. It uses 22L per 100k calculating out at approx. $20 per 100k. This increases to $30 per 100k whilst towing. I estimate that if I was to convert it back to petrol then the cost would be the same without the hassles of:
    1. Finding fuel in remote areas.
    2. Enging running hotter on gas.
    3. Loss of boot space.
    4. Cluttered engine bay.
    5. Extra fill stops. (I only get 200 k per tank whilst towing)
    6. Less power
    I estimate my usage on petrol whilst towing would be around 20L/100k on petrol which is $33 per 100k.
    So, is it really worth converting? I think not. Mine will be back on petrol soon.
    Regards Dave

  80. This is getting to be criminal LPG 90c a litre, in Perth. Just filled up on petrol at $1.33 for 91 unleaded, HELLO … I have had LPG cars since the mid 90s ,the costs of LPG has gone threw the roof, as far as I am concerned if you pay between anywhere from half to a third of the price of petrol for LPG then you are doing ok, but any more than this you may as well just drive on petrol, don’t forget the yearly checks on your system and the extra parts you may need to replace, anywhere from valves and ceats to the converters.
    I have three cars on LPG, two fords that are dedecated gas and a landcruzer with duel fuel, gas and petrol. This year alone one of the fords has cost me $1800 dollars to get the gas system working properly, the other has been at the mechanics for the last month, because being a newer model no one can figure out why it will not run properly on gas. I have had a new converter, solonoids, valves, etc, Thank god the cruzer also runs on petrol. The conclusion I am coming up with is this.
    — we are now getting a infurior type of LPG that is making the cars less efficent and basicaly making them run like
    POO. The mechanical cost for the parts and LABOUR is now costly and we are now taxed to the hilt, so now it is time to get rid of the gas cars. As they say, as the gas comes down from WA it is cheaper to run and enviromently friendly. All I have to say is PIGS ARSE!!!!!!!!

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  82. Hi everyone look I have a 2010 Holdern Colorado since new 1 year or so after purchase I put it on LPG dual fuel. What a GREAT move best possible thing anyone could do. No problems except for a faulty sensor easly detected & fixed smooth as PERFOMANCE great trouble free motoring. I don’t know if the government still has the rebate, I like to suggest DO IT get the real savings. All you have to do is change the LPG filter every 10,000 Klm & you will have happy motoring

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