Thread: Are US Dealers using 0W-30 or 5W30 on LCI M5s?
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      01-12-2014, 11:00 AM   #32
M5Rlz
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Quote:
Originally Posted by stealth.pilot View Post
BMW says you can do that. I wouldn't do it.
Mix the two?

Or top it off even with matching oil?

Or both?
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