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I even asked the guy at the Welt delivering M3_Adjuster's 1M. He said(the SA at the Welt) that the 1M only shares the rear end... so the diff fluid is the same. He said for the trans fluid... it doesn't need to be changed as per BMW NA... but IF it were driven in Germany... it would be better to change the trans fluid at the first service (1,200 miles). And the engine oil uses the same oil as say a 135i, the BMW LL-1 Castrol full sythentic oil.
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