Originally Posted By: chubbs1
WAY THICKER than the SM version. Wait a second, is the SM 5w50 and just mislabeled? I am confused.
Me, too. I'm not even talking about the tested viscosity. Blackstone gives the expected viscosity range for SN 15w-50 as 17.7 to 20.6 cSt. They give the expected viscosity range for SM 15w-50 as 14.5 to 17.0 cSt. Perhaps I'm new to reading oil analyses, but I would think that the expected weight range of a 50 weight oil at 100 C would be the same, regardless of brand or API specification.