0w20 and 5w20 viscosity at UOA...

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1,381
Location
Southeast Kentucky
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. [Dual]
 

Jay

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1,607
Location
Idaho Falls, ID
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.
 
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