ok i`ve filled up now and......................


I normaly average 44.5 mpg but with ultimate 43.4 ! I will admit it was over the cold spell but i really didn't expect a massive reducton even with better weather.

save your money go for bog standard 95ron drive with car and you`ll get better MPG.

But if you've modded your car or chipped it then go for it. day to day driving

you need to give your ecu time to adjust to different octane fuels before you see the difference

i can see how the ECU would adjust the car to run on worse fuel by the knock sensor but to adjust to run better? i think a remap would make use of extra oomph.