Well, if a hot 40 turns into a 30 something, wouldn't a hot commercially viable / no-racing 50 turn into a 40 something?
-A
Originally Posted By: Patman
The question is, why on earth do they make a 0w50 at all? I can't imagine very many engines out there at all that need an oil of this viscosity. Their 0w40 is already a great oil, what benefit would it be to go any thicker than this??