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Old 01-21-2013, 04:05 PM
German Steel German Steel is offline
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Location: Durham NC USA
 
Join Date: Dec 2012
Posts: 65
Mein Auto: 2008 535xi
My 08 535xi @ 49,000 had same symptoms and had radical improvement after walnut shell blasting. Cost $575. You should see the squirills sniffing my tailpipe.
Apparently this carbonized oil buildup is minimized with high rpm driving ;-)
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