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      11-28-2012, 10:44 PM   #12
TreDirtyFive
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Drives: X3 M40i
Join Date: Jun 2008
Location: Los Angeles, CA

iTrader: (11)

the manual actually specifies that 89 is useable in the 328i as well as the 335i. 5 octane points is actually quite dramatic when it comes to power. you should look at the cars dynoing on on 91 and 93 with comparable mods. it can sometime show a pretty decent disparity.
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X3 M40i G01, M235i F22, 335 F30 MSport, 135 DCT, 335 E92, Audi A3