Havoline ProDS synthetic, thanks to the 6Qt easy-change box being on sale at WM for $12.97 sometime last week. 0W20 and 5W30 have d1G2 certs, 5W20 does not. PDS obviously won't tell much, only real differences I see are VI is lower on the 5W20, and pour point doesn't go as low as 0W20. I know lower pour points usually mean either some PAO or more PPDs in the mix, but I'm still curious why two of the grades would meet dexos and the 5W20 does not. Higher VI usually means more VII, so I'm not too concerned about a lower VI as much (as Noack is lower as well on the 5W20).
It's just a confusing conundrum. And no, none of my vehicles "require" dexos, but like I mentioned in another thread, I do understand that the cert at least gives some guarantees that the oil has actually been tested for meeting a certification rather than just the plain API self-cert method until proven guilty.
So I guess the main question is, we are looking at what should be 3 very similar add-pack oils, in 3 very closely related grades, and only two meet dexos. What would likely be the main additive to make it meet the cert, or is it more likely that since 0W20 and 5W20 are essentially interchangeable, they only paid for one of them to be certified? BEGIN! Havoline ProDS PDS