I just got this car, i'm assu ming it has the "dealership brand" bmw oil in it, which is synthetic but i doubt it's the best. I live in a climate where it's cold and hot (philadelphia), do spirited driving year round and i'm wondering what the best oil would be. 5w-30 synthetic is recommended but i've heard of many people using 0w-40. I think im going to go with Elf brand oil, but im not sure which line of their oil would be best for my car or if there are any other brands that would be better. The car has 93000 miles on it and im looking to keep it another 50K, driving as hard and fast as possible! Thanks! Sorry for the Ramble!
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