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Old 06-24-2009, 10:32 AM   #1
nathancarter
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Join Date: May 2007
Location: Riverview, FL
Posts: 1,394
My Ride: 02 330i
Used oil analysis from Blackstone Labs - BMW 5w-30

Here's my UOA, including a TBN which measures the remaining useful additives (necessary for determining whether to extend your oil change intervals or not).

This is with approximately 7500 miles on BMW 5w-30. Engine had about 106k at the time of the change.
Driving style is usually very conservative, primarily highway cruising at 75-85 on the interstate; however I also had one Autocross day in there.
Air filter is an STP off the shelf at Autozone.

I used Mobil 1 0w-40 at this oil change, and will send in a sample of that when I change it at 7500 miles.



P.S. Yes, they noted that it was a 2.5L M54, but I don't think that's material for a UOA.
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