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      11-14-2011, 11:16 PM   #9
Drives: 2007 335xi
Join Date: Sep 2009
Location: Colorado Springs

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Originally Posted by richpike View Post
Interesting - do you have a tune to take advantage of the additional octane (e.g. Advancing the timing)? Or do you see a difference even stock? If so, what blend are you running?

If you do half a tank of E85 and half a tank of E10 (regular gasoline) that means you'd be running around E48 or so? Almost 50% ethanol? I've never thought of doing that to increase the octane - intriguing.

You only need a few gallons of E85 ~3gal per tank in order to get the equivelent of 93-94oct. E85 is minimally 104oct, so a simple wieghted ratio will help you figure out other mixes (when mixed with 91oct)
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