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Old 10-26-2012, 12:40 AM   #8
peytonracer4's Avatar
Join Date: Jan 2010
Location: Valparaiso, IN
Posts: 7,756
My Ride: '00 328i
Also, like I said before, google search pre detonation. And why does bmw require 91 octane
To better understand the whole point behind this. 87 has the potential to explode before spark in higher compression engines which is very bad.
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