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Old 02-08-2011, 07:32 PM
jesimmons jesimmons is offline
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Location: Falls Church, Va
 
Join Date: Jan 2008
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Mein Auto: 2008 535i
Not entirely off topic... but... This water vapor contamination in the crankcase is yet another reason why BMW-recommended oil changes at 15,000 miles are rediculous. These vapors condense and form acidic compounds that can damage internal parts over time. All oils have additives to counteract these acids, but as they do their job to neutralize the acids, they become depleted. Modern top-line synthetic oils have no problems lubricating for 15K miles, but usually by that time, the acid reducing additives are long gone. Specially if you live in really cold winter climates and run the engine for short trips. If you only do short trips in the winter months and the temps are cold, an oil change in the spring is not a bad idea.
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Last edited by jesimmons; 02-08-2011 at 07:33 PM.
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