Quote:
Originally Posted by hogzilla
3-5k here. As mentioned above, cheap and worthwhile. My drive is 7 miles to and from work in stop and go traffic and a weekend out here and there.
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So true! The oil changes are cheap (esp. if you do it yourself) insurance to making sure your engine lasts a long time.
Quote:
Originally Posted by jmillet
My Z4MC sees a lot of HPDS track miles so I change 10W-60 oil every 4000 miles and do a Blackstone oil analysis.
Attachment 481582
If it was a daily driver only I'd probably stretch the OCI out to 7,500 miles.
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Blackstone is an excellent way of establishing what OCI is best for you AND for monitoring for abnormalities.
I have an 3.0si, but here's my first UOA I did since the car was new to me:
http://www.bobistheoilguy.com/forums...Number=2137536