0w20 and 5w20 viscosity at UOA...

[mikemc]

Since the UOA I have read show viscosity at 210 degrees, wouldn't a 0w20 and a 5w20 show similar viscosity numbers since the oil is at the 20 weight operating temp? Hmmmm, M1 0w20 looking good, even if it doesn't actually qualify as a manufacturer spec'd 5w20.

 

[Jay]

Mobil 1 0w-20 is 5w-20. By qualifying for the SAE 0w cold temperature designation it automatically qualifies for the less stringent designations including 5w-20, 10w-20, 15w-20, and 20W-20.