Hello: Quite strange feeling to note than the last several posts have been mine. Anyway, from my S54 days, I remember reading somewhere that the specialty oil BMW calls 10W60 is actually 5W30. This is not a statement, this is a question. Again: SEARCH may give me several treads to read, and on a one line post on the 17th page there may be the answer. I'll keep reading...maybe somebody knows the answer.
10w60 is NOT 5w30!!
Different viscosities.
Of course the brands can be the same.
Well you could get both and send them in for oil analysis but they are different oils
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