Originally Posted By: Wolf359
Why did you use 5w40? I believe Castrol 0w40 is 229.5 and I think most newer MB's spec 229.5. For 5w40, it's MB 229.3 which is the older spec, 229.5 is supposed to be better. Mobil 1 0w40 is also MB 229.5.
I happen to have 8 quarts of this oil in my stash just wanted to use it up, After this OCI its back to M1 0w40.