Quote:
Originally Posted by cosmick
Hello.
I'm used to put Castrol transmax Z oil in my M5 e39 manual gearbox, it really changed it and make it perfect !
I put the same in my 1M yesterday, the shifts are better.
I hope that I will not have problem in some kms...
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I don't know if that oil would work well. It does not seem to be an approved oil for BMW gearboxes. ?
http://www.castrol.com/en_au/austral...ransmax-z.html