[naz]

we didn't need to go past the 2nd post in this thread.... :D

naz Wrote:i think it is almost certainly in your head dude... the only way higher octane fuel offers more performance is if your ECU is setup be aggressive to advance timing and/or boost if no deto is seen... i'm like 99.9% sure that a stock focus ECU doesn't do that

the only advantage i can see for a stock focus using higher octane is that the fuel is cleaner and less likely to leave gunk in the fuel filter