Petrol Question

[LUMO]

Im in sydney I always use bp ultimate....

[purple headed warrior]

My experience has taught me that it more important to use fuel from a clean servo than which brand you use. I had been running BP ultimate for 18 months, purely because that servo was the closest. Recently they increased the cent difference between ULP and ultimate from 9 cnts to 13 cents so I changed. Also another servo on my regular run closed for a couple of months to replace its underground fuel tanks. So I have recently changed servos to Mobil 98 RON (whatever it is called). My fuel economy has improved 0.5L/100KM, I think it has more to do with the new and clean tanks rather than differnet brand.

You will also find differnt bowsers will read different amounts which can often change your perception of fuel economy. Take a canister to the servo that has a known capacity to see if you are getting ripped or rewarded.

IMHO these 2 factors are much more important than the brand of fuel you are using. Theory suggests they should all be the same anyway as they have the same octane rating.

PS If you can buy your fuel at a place that is cold you will also benefit as you will be getting a greater density of fuel per litre but this is negligible unless the place is 5 degrees colder or more.