There is no such thing as a 5W-38, 5W-35 or 5W-32.

In the real world any 5W-20 is pretty darn close to 8.9 Cst at 212F. It's a pretty narrow range.

But in that same real world 5W-30 products range all the way from 9.6 to 12.3 Cst at 212F that's a pretty wi... Login to read more.