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      01-23-2017, 06:25 PM   #8
No Boost
enthusiasm > practicality
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Drives: 987 CS | G35x
Join Date: Oct 2016
Location: Chester County, PA

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Quote:
Originally Posted by Ceeto View Post
I haven't seen gas without 10% ethanol in YEARS.
Ethanol isn't bad as such. In fact, you could mix some E85 (if you can find a station that sells it) with 93 octane and it will give you an effective higher octane and slightly less miles per gallon. and higher octane allows more boost

Just be sure your fuel system can handle it. I think with modern BMWs we would be ok with about 3 gallons of E85 with every full tank of 93 (in our 13 gallon tank).

There are some ethanol calculators out there which can help you see how much mixing of E85 you could do and what your new effective octane rating would be.
3 gallons of E85 (105 oct) with 10 gallons of 93 (10% ethanol) would be about E27 (96 oct). Think it's safe for our stock fuel system?
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