[AddictedToBavarian]

This has always been in the back of my mind and I thought I'd ask...

I bought my car from someone's 3 year lease as CPO. Being that BMWs bs oil change intervals are 15,000 miles whoever leased my car did only the recommended 15,000 mile intervals which means 2 in 3 years (in service date 2/08)!

Oil was changed at

9/17/2009 @ 15,618 miles
1/19/2011 @ 31,884 miles
I am currently at 34,900 miles

Wonder if I/we worry about this and possible sludge buildup. Anyone given this any thought?

[AddictedToBavarian]

Originally Posted by TrackRat

No one has shown any sludged up BMW engines from 15K mile OCIs. They have been doing up to 18,600 miles OCIs in Germany for years.

Actually, there was a thread here once about somebody who did have sludge buildup on a CPO that had documented 15,000 OCI. Causing the car to become undriveable. BMW blamed him and suggested the only resolution be replace the engine!

[kurtural]

There is nothing wrong with the computer based oil change interval. I am at 190k on the 3 series and only had CBS oil service