Originally Posted by TrackRat
Just an FYI that the Mobil 1 0W-40 is BMW LL-01 approved and the Mobil 1 Turbo Diesel 5W-40 which is completely different chemistry is not BMW LL-01 approved and does not meet BMW warranty requirements for those who value their new vehicle warranty.
I understand that it is not BMW LL-01 approved but why do you think?
IMO, I think one of the main reasons why it isn't BMW LL-01 approved is because of an emmisions deal, because if you compare oils, the 5w40 has better wear properties than the 0w40.
This is one of the reasons why I was interested in this oil.