Quote:
Originally Posted by richie_s
Yup, the 2013 model year oil change intervals suck. I'd love to have the 10,000 oil change interval so I could get an oil change at 5k miles and a free one 5k miles later.
And how do I know that my engine isn't full of sludge? Is there anyway to tell without disassembling my entire engine?
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If anything sludge is usually a result of severe oxidation of the oil caused by very high heat. You mentioned a lot of cold wx ops. Sludge, I believe, rarely occurs in today's synthetics.
If you're really concerned about BMW's oil change interval, you could start to do used oil analysis. For folks new to the process, Blackstone is a good start because they try to interpret the results for the owner
http://www.blackstone-labs.com/. I'm not a big fan of their commentary, but they are a start. Small books have been written on how to interpret uoa results.
Or, you could read this thread about BMW's oci's in Europe - - and relax.
http://f30.bimmerpost.com/forums/sho...d.php?t=894011
Do not do 5000 mi oil changes. A total waste and totally counterproductive.
http://papers.sae.org/2007-01-4133/
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'14 328d, '13 M3 ZCP, '12 535i, '11 335d, '09 Z4 DINAN Stage II, '05 330i ZHP, '05 M3 ZCP, '02 M3, '91 328i, '90 535i, '88 528e, '88 M5, '87 M6, '95 Z3, 95 M3, '93 M5, '87 325e, '89 535i, '86 635i, '73 Bavaria.