Volvo Owners Club Forum - View Single Post

DutchV40 · Oct 5th, 2008, 16:12

I always understood that the number before the 'W' states for the thickness of the oil when the oil is cold. So 75W80 is as thick as 75W90 except when warm?
When warm the only difference is that 75W90 is a little bit thicker?

Oct 5th, 2008, 16:12	#1
DutchV40 Senior Member Last Online: Apr 5th, 2011 12:21 Join Date: May 2007 Location: Brabant	75W80 oil vs 75W90 oil? I always understood that the number before the 'W' states for the thickness of the oil when the oil is cold. So 75W80 is as thick as 75W90 except when warm? When warm the only difference is that 75W90 is a little bit thicker?