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      08-20-2012, 08:44 PM   #11
Private First Class
Drives: 2009 335xi
Join Date: Oct 2011
Location: Houston

Posts: 121
iTrader: (2)

I sometimes run a 50/50 mix of E85 on the JB4 and get about 2 more peak PSI on the gauge. It's awesome! Gas mileage goes down by about 2 MPG tho, not from flooring it more, but because ethanol always gives you less mpg but more octane.
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