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      10-11-2012, 05:28 PM   #13
Drives: AW 135i
Join Date: Aug 2012
Location: Waterford, Mi

Posts: 1,228
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2008 BMW 135i  [2.83]
Its a pretty well known fact, theres been load of research over the years. Nothing recent however because it is considered a law of automotive science.

And pushing your car harder on 87 octane to use up gas is a very unwise decision when your car requires premium.
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