Back to the viscosity and the question of whether the manufacturers vary visc. for CAFE numbers. Yesterday I saw the owners manual for a 2002 Chevy Blazer for export. Recommends 15w40 or 20w50 oils in all engines. Anyone have a book for the U.S.?
I think that is a given. Trucks fall under a different (or non-existant???) CAFE. Hmmmmm... the same engine in a truck calls for a higher viscosity than the same engine in a car.... Hmmmm what could this mean??? Mayber an oil heavier than 30 wt is good??
I didn't check the book to see which engines are offered. Should have. It was a customer's Blazer, so if I am in the office 4,000 miles from now I will ask to see the book again. Maybe he will be in for a wash before that.