Originally Posted by ozinaldo
+1. Artemis, there is a list of proper oils in the relevant section of the supplementary 1M manual. Stick with that one, try not to mix different grade oils when it comes to adding oil and don't forget that BMW services at times may be suffering from the same syndroms of competence even in Germany or its neighbours when it comes to a relatively rare product like 1M
Fact check of what I was told: real ///M engines require 10W60. However the engine used for the 1M (N54) is not a 'true' ///M engine. The Twin Turbo got to stick with 5W30. However, if I want to push the 1M hard on track 10W60 would be more appropriate. Here you got it - so the story goes (at least the one I was told).