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Old 11-28-2012, 07:06 PM
HerbP HerbP is online now
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Location: Georgia
Join Date: Jul 2009
Posts: 4,876
Mein Auto: 2005 645Ci & 2007 750Li
I would say the 5000 mile range should help, this would keep the TAN ( Total Acid Number ) level down in the oil. Heat & oxidation of the oil is the contributing factor. The gaskets are a known failure issue that we have to deal with!
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