Have you ever used Premium Unleaded petrol in your vehicle instead of Regular Unleaded? Did it seem to go further, dollar for dollar? Did it have any noticeable effect at all?
If your car is optimised to run on Regular Unleaded 91 RON (Research Octane Number), then using PULP may have a marginal effect on the fuel consumption and cost saving.
So if, hypothetically, a vehicle was designed to operate on any octane (which is never the case), using 98 RON would give a seven per cent increase in power or a seven per cent decrease in fuel consumption compared with using 91 RON. Cars that are designed to run on PULP 98 RON may still run on 95 RON but you may lose around three per cent of power, or increase fuel consumption by this amount.
Therefore, if ultra premium fuel costs more than seven per cent more than 91 RON, is it economically unwise to use it?
The simplest advice is to use the octane recommended in your owner’s manual.
Have you used Premium Unleaded and noticed any improvements in your vehicle’s fuel economy or performance?