Quote:
Originally Posted by nnguyen04
My been using bmw castrol 5w-30 forever. Can i switch to this right away? Heard many benefits running 0w-40
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Sure, why couldn't you switch oils right a way?
BMW says you can use ANY oil in the 5w30, 5w40, 0w30, 0w40 grades that carry a "BMW Long Life 1 (LL1)" rating on them. And the oil has to be of API SM or better.
Many of us noticed cooler oil temps when we switched to German Castrol(G.C.) 0w40 oil. I used to run Mobil-1 European blend 0w40 LL1 oil, but then I switched to German Castrol in 0w40. I noticed right a way that the engine sounded less metallic on cold starts and seemed to run smoother. Also the oil temps went down almost two needle widths! I was sold on G.C.