Is QSUD 0W-20 Better Base Stock Or Just More VI Improvers ?

[Fallguy]

Vs QSUD 5W-20 Base Stock. Or no way to know.

 

[OilUzer]

Typically 0W oils have to be more superior to meet the 0.

I personally take 0W20 over 5W20. We are not talking about that much VII differences since 0W oil have also a higher natural VI.

Also I think with he 0W oil, they are forced to give you a better base oil whereas the oil companies can get away with a relatively more inferior oil making the 5W or 10W.

having said that, I still use a lot of 10W30's ... Recently found M1 EP 10W30.

 

[Gene K]

Lower viscosity (minimal) coupled with higher flashpoint (About 9F) makes me think higher quality basestock.

 

[aquariuscsm]

The 5W is a tiny bit thicker at operating temperature if that matters.