Question about Viscosity Index

Status
Not open for further replies.
Joined
Feb 14, 2008
Messages
434
Location
MD
How can Motorcraft Blend 5w30 have an viscosity index of 163 while Pennzoil Platinum 10w30 has a lower index of 154? Furthermore, the MC 5w20 has an index of 164 which is higher than the MC 5w30. What am I not understanding? I thought synthetic group III had to exceed the 120 mark. Thanks guys, I just want to know how to interpret the MSDS's.
 
From what I've read, you can't compare the viscosity index of one weight of oil against another.

And I believe that the minimum VI numbers are without any additives. No pour point depressants, no viscosity index improvers, no friction modifiers.
 
Status
Not open for further replies.
Back
Top