Originally Posted By: CATERHAM
Yes and they're all virtually identical with VIs around 170. I think the reason no one formulates an ultra high VI 30wt oil is because the OEMs that want to maximize fuel economy simply specify a 20wt oil instead.
Agreed, and if one were looking for a higher VI in a 30 grade, one could try an appropriate 0w-30. Obviously, there are notable exceptions within that grade.
Yes and they're all virtually identical with VIs around 170. I think the reason no one formulates an ultra high VI 30wt oil is because the OEMs that want to maximize fuel economy simply specify a 20wt oil instead.
Agreed, and if one were looking for a higher VI in a 30 grade, one could try an appropriate 0w-30. Obviously, there are notable exceptions within that grade.
