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Old 06-24-2009, 12:13 PM   #7
bmwbun
Banned
 
Join Date: Mar 2007
Location: CO
Posts: 1,956
My Ride: Pre-facelift Coupe
Quote:
Originally Posted by nathancarter View Post
My primary purpose was just to make sure my motor is wearing properly - no extra lead (bearings), aluminum (block, head, etc), or iron (valvetrain etc) in the oil. Also that it's running properly (insolubles) and no internal leaks (water/antifreeze). The TBN analysis was secondary; I don't really expect to extend my oil change interval from 7500 to 10000.
Makes sense.
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