Poll: Mixing oil ok?
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Yes, of course
88.89%
8 88.89%
Not if you want to preserve your engine
11.11%
1 11.11%
Total 9 vote(s) 100%
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How Deleterious Is It to Mix Oil Brands?
#10
Don't use automotive oil, the additives may damage the coatings of the internal engine parts. In any auto parts store (Autozone, O'Reilly's, etc.) ask for Motorcycle Oil. They rarely have 5w-40, but I have found they always have 10w-40 four stroke motorcycle oil, with the BMW-specified API SL/JASO MA2 rating.
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RE: How Deleterious Is It to Mix Oil Brands? - by mspratz - 06-19-2021, 10:20 AM

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