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Originally Posted By: Clevy Originally Posted By: Rand Originally Posted By: stancyeze Hello, as stated above, I have a 1997 BMW M3 and I have heard about people using diesel engine oil in there M3's.. how is that good? 10W40 Shell Rotella is what I've heard is used. I just bought oil. Mobil 1...

Originally Posted By: CATERHAM Unless you're engine is worn (and an oil pressure test will tell your that), you shouldn't need to run anything heavier than the BMW 5W-30. In fact any 5W-30 should work just fine although they are a bit lower on ZDDP, not that that should be a problem if you don't...

Originally Posted By: tudorart Motul is cheap and deceiving. I think a 50 weight is too much for you unless is a 0W or a 5W....but it really depends on your engine's shape. A tech where I work told me to get 15W50 actually, and Motul is a decent race oil, but to each their own.

Hello, as stated above, I have a 1997 BMW M3 and I have heard about people using diesel engine oil in there M3's.. how is that good? 10W40 Shell Rotella is what I've heard is used. I just bought oil. Mobil 1 15W50, but I want to try something new.. Any thoughts? Was using 5w40 Motul before.