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Old 11-01-2012, 09:49 AM
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dolfan13 dolfan13 is offline
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Location: lexington,ky usa
Join Date: Jan 2011
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Mein Auto: 545i
Originally Posted by jim165 View Post
Call me an over-maintainer, but if you're aware of the valve stem seal and guide issues with the V8s, you'll understand the need to cut the change interval in half. I can deal with doubling up on oil changes vs. paying $4500 for head work.
Also, if I had a 535, I'd definitely change the oil more frequently being that it's turbocharged. BMW's 15K interval is simply a clever way to cover as few "free" oil changes within the 4yr maintenance period as possible...
Agree 100%, did my own valve seals.Exhaust side seals bad,more heat on these valves maybe?PAO better at heat dissipation?Better oil cooling from fresher oil and PAO is my theory.Hope seal last longer than the factory 80k did.

Last edited by dolfan13; 11-01-2012 at 09:50 AM.
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