Quote:
Originally Posted by OldGuyBRZ
Has anyone mixed E85? I've been putting a bit of 100 octane in each tank to boost to 93 or 94, and was wondering if it would be cheaper to use E85. I have heard that if your car isn't set up for E85, it will cause problems.
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Why are you wasting money on mixing in some 100 octane in the first place?
Your car might gain 1/8th of a WHP, but maybe not even that. Extra octane doesn't help you unless your engine is tuned and maximized for it. It certainly isn't "better" for you car. Buying quality fuel without additives (like extra ethanol) is more important than octane. I'd put 87 from Shell/Chevron in my car before 93 from Joe's Fuel Shack.
Octane rating is just the temperature at which the fuel detonates (better explanation a few posts up). It's not a "better" fuel.