What is the best synthetic oil for your 2001 BMW?

Answer 1

Any will work fine, Mobil 1 is considered to be the best of major brands. Mobil 1 use to be the factory oil of choose, no BMWs come with castrol. The main thing is to change it regularly. Since the factory has to pay for them now( maintance covered leases) they do it at 15,000mls. I won't go past 5000mls. between changes. I've seen 3yr old lease cars with sludge deposits under the valve cover because of the oil change interval. I've also seen e28 m5 (30yrs old) with cylinder head u can eat off of, because the customer has it changed early.