Quote:
Originally Posted by Palomequet
If you carry your own oil to the dealer, is there an issue about warranty?
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No. 0W-40 is an approved viscocity for use. (Check your owners manual) Of course, BMW recommends Castrol at every opportunity, as that's who they are allied with (since 1999). It is no different than MB AMG, Porsche, Aston Martin, Bentley, and other auto makers with Mobil 1. I won't use anything else but Mobil 1 in 5 cars, my Harley, and my boat (of course in the recommended viscocity/type for each). The dealer had no absolutely no issue whatsoever.