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      10-26-2012, 07:25 PM   #1
First Lieutenant
CarbonFoot's Avatar

Drives: 2017 F80 M3 DCT ZCP
Join Date: Dec 2011
Location: CA - Bay Area

iTrader: (2)

Running E85 mixture safe/not safe?

Running E85 on the M has interested me for long time, but until recently, I haven't heard of anybody running it. Lots of FI guys run it with great results and the cost per gallon is lower than regular unleaded, let alone racing fuel.

To my knowledge, no tuners have attempted to produce a calibration for it and I could never really determine if it was even safe to run through the stock fueling system - until I stumbled across this snippet in the manual.

So surely running a tankful of E85 is not recommended, but what gives those of you running low percentage mixtures peace of mind?
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