Quote:
Originally Posted by tturedraider
BMW has been doing 10k mile synthetic oil changes for over 20 years now and there’s been no increase in engine failures in all that time.
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No, not 20 years. It used to be CBS 15K/24 months prior to MY 2014. But BMW revised this in 2013 reducing the OCI from 15K to 10K (and 24 months to 12 months). The service bulletin is posted here:
https://f30.bimmerpost.com/forums/sh...d.php?t=868293
The 15K OCI started when BMW started paying for oil changes. My first E36 was 10000 km (6200 miles) or once per year.