Originally Posted by mi_bimmer
Mobil1 0W40 has been often recommended on here (and I am using it in my E90 N52 currently ) However, I came across the following link elsewhere on this forum. The results for M1 0W40 don't look so good.
Sharing on this sticky since it seemed relevant to this discussion.
Please use this as another data point to make an informed choice on what's best for your car (I am not making a recommendation for/against M1.)
I'm afraid I only read through most of the first page, and kind of scanned the results, but I could not find the temperature at which these oils were tested. If it was at room temp, which I am assuming, I would not see how these would be accurate results as the temps oils are subjected to are rarely at room temp....