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Old 10-12-2012, 07:38 AM
mbell666 mbell666 is offline
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Location: Austin, TX
 
Join Date: Jul 2012
Posts: 220
Mein Auto: e39 2002 540i6
From what I've read it oil change count down. I believe it actually based of measured fuel flow into the engine. I think the basic idea is the more fuel the more blow past fumes and the more carbon produced, so the sooner you should change the oil. It does seem to target ~15k in most cars.

Personally I change the oil ~7.5K as well.
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