It will be either 0W-40 Mobil One or 5W-30 Castrol Syntec (German, not US)- have not decided, just bought my first BMW ever 2 weeks ago. From what I read they are nearly the same viscosity. And this is tricky as after reading many posts on oil, there are only 3 types of oil allowed that are readily available in the US. (All full synthetic):
5W-30 Castrol Syntec- (German, not US)- which is BMW oil. (Order on line or buy at BMW dealer only- not available in parts stores)
0W-40 Mobil One (Commonly available)
5W-30 Valvoline SynPower (Not sure if this is US brand or German). US brand is commonly available.
I am curious as to what people who do their own work use. From reading other posts I see that 0W-40 Mobil One is most common.
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