quote:
Originally posted by Patman:
Mobil's 0w40 is actually right in the middle of a 40wt, it's not on the thin side like their other
viscosities. To be a 40wt it must be between 12.5 to 16.3cst at 100c. Mobil's 0w40 is 14.4.
I think it's probably safe to run though. As I mentioned in another thread, when a car maker
recommends an Xw30 oil, it's safe to go one step higher to an Xw40 oil, if you're gonna
drive it hard and/or drive it in very hot weather.
I normally would shy away from oils with such a large spread like 0w40, but this new Mobil 1
0w40 sounds like it is very shear stable. I'd still probably go with a 15w40 myself if I was going
to go thicker than my good ole 10w30.