Quote:
Originally Posted by alpax
Yes, I still had a half-tank of 94 from Chevron. Is it so bad to run on 94?
I know the CARB tune is for 91, but it was mentioned it adjusts to the higher octane, and I thought 94 should not hurt. The manufacturer actually recommends 100 octane for track, but that's a different thing of course.
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There's something funky about the 94 up here. I've heard some positive responses, but most show a decrease in power (or an increase in knock) vs even 91. The only way to know for sure is to do some data logging as you just can't trust the number plate on the pump.