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Old 04-07-2010, 02:23 PM
bdeutsch bdeutsch is offline
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Join Date: Feb 2005
Location: Northern, CA
Cobra Make, Engine: Still Working on This
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While I do not know if their is any collusion between BMW and Chevron, I know that for my M5, BMW recommends Chevron Premium. I have tried other brands (in Sacramento area), to test the recommendations and save some money, but I can tell when something other than Chevron Premium is used in the car.

Nothing particularly scientific to my conclusions and there is always a chance that I am over sensitive to engine sounds when not using Chevron...
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