Mobil has given conflicting information about the M1 SUV 5w-40. Also, remember that HDEO oils have higher levels of things like Zinc that kill the Cat converters than a standard engine oil. While I think M1 5w-40 is a good oil, in this case, the 0w-40 having A3, BMW LL-98/01, MB 229.1/.3/.5 is more appropriate. Finally, for all the talk, I have seen more good UOA's of the 0w-40 than the 5w-40.

Finally, the three UOA's are for the same engine design. While it is not as good as a comparative test using the same engine (which I also posted), they are generally accepted as a good baseline.