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      01-16-2020, 11:21 PM   #6
jpy1980
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Drives: 2015 BMW M3 Mineral White
Join Date: Sep 2018
Location: Los Angeles

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I wanna do this because i have crappy ACN 91 octane. I tried using a couple of gallons of 100 octane but at $10/gallon, it was pricey.

Would making equivalent to e20 be as beneficial as a couple of gallons of 100 octane?