On another note, I just learned something very interesting today with respect to the level of anitwear, ZDDP in current formulations. If the
oil is licensed first as a C(Compression ignited) or diesel, and then gets the S(Spark ignited) gasoline, approval, the .10% phos requirement is wavied. That means that you could use this formulation in your gasoline engine and get the higher level antiwear. Most of the
oil company guys are using the C qualified oils in their cars for that very reason. And don't listen to the ash arguement, it has no merit.
BinB, you might want to go that way on your engine.
I am rethinking my Mobil 1 in my 408, but would still use a 15W-40. Comments??