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      11-06-2012, 02:31 PM   #2
quadpipes
First Lieutenant
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Drives: '11 E92 M3 IB/Beige,M-DCT,ZCP
Join Date: May 2009
Location: Missippi USofA

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BMW Fuel System Cleaner (which is Techron, and can also be purchased at most auto stores) twice/year. Highly recommended by many. Hard to say if I see direct results, but I think it is the right thing to do. Good luck!