HPL No VII Euro 10w20 15,000 Miles 2013 Elantra

[jetman]

Why?

and
https://www.machinerylubrication.co...:text=To achieve bull’s-eye oil analysis data,

 

[thetricky]

Wow that is an incredibly stout oil! Thanks for posting OP.

 

[DirectRejection]

It’s not oxidative thickening in this case; Dave has gone over this before in my thread on the No VII Euro 5w30 in my 3.5 Eco. The viscosity increase is essentially a work-hardening, as all base oils will thicken in use over time, even when there is no significant increase in oxidation. Oxidative thickening, IIRC the way Dave described, is rapid, significant increase in viscosity. Not from 9.0cSt to 11cSt in 10k miles, more like an increase from 9.0cSt to 20+cSt in a couple hundred miles. This series of oil, same as the CK-4 oil @wwillson uses, are truly incredible oils that defy what you’ve learned based of shelf stock oils. It’s legit.

So it has been said on BITOG that oxidative thickening leads to varnish and more.

"...work-hardened oil."
I like this term.

This oil can go 20k for OP !