This is a 2007 MINI Cooper S with a turbocharged engine.
The oil sample was taken during an oil change. This oil saw 2 hours of hard driving on a race track. The current UOA is for Mobil 1 0W-40. The samples dated 03/29/09 and 02/01/09 are for gold GC. The sample dated 05/24/08 is for BMW/MINI 5W-30 oil.
Any comments?
BLACKSTONE COMMENTS: Thanks for the note about the track time. Had you not mentioned it, we never would have guessed. Guess those guys (and gals) at BMW really do know a thing or two about building nicely wearing engines. We generally suggest keeping your oil runs short when racing, as that type of operation puts extra stress on an engine, but we think going 5K mi on your next oil should work fine. The TBN read 5.3 so you still had plenty of active additive left. We consider a TBN reading of ~1.0 too low for extended use, as virtually all of the active additive in an oil has been exhausted.
The oil sample was taken during an oil change. This oil saw 2 hours of hard driving on a race track. The current UOA is for Mobil 1 0W-40. The samples dated 03/29/09 and 02/01/09 are for gold GC. The sample dated 05/24/08 is for BMW/MINI 5W-30 oil.
Any comments?
BLACKSTONE COMMENTS: Thanks for the note about the track time. Had you not mentioned it, we never would have guessed. Guess those guys (and gals) at BMW really do know a thing or two about building nicely wearing engines. We generally suggest keeping your oil runs short when racing, as that type of operation puts extra stress on an engine, but we think going 5K mi on your next oil should work fine. The TBN read 5.3 so you still had plenty of active additive left. We consider a TBN reading of ~1.0 too low for extended use, as virtually all of the active additive in an oil has been exhausted.
