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carsnob

10-11-2008 10:52 PM

is 94 octane better for the car than 91?

I have been using Sunoco 94 octane in my '06 C4S figuring that it's better for the engine and for performance. Is it a waste of $$ and would 91 octane essentially make the same difference? I've heard varying opinions and am now totally confused!

PorscheDoc

10-13-2008 09:51 AM

RE: is 94 octane better for the car than 91?

Is it better for the car, probably, but you aren't going to notice any difference in performance without remapping the ECU.

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