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      03-29-2018, 01:07 PM   #1371
louielouie
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Drives: '15 435i | '16 M4
Join Date: Jan 2016
Location: Los Angeles

iTrader: (8)

I live in LA, and the 91 octane is causing timing corrections. If I wanted to pump e85 to supplement, will I need to purchase and reflash the e20 map?