OVERKILL
$100 Site Donor 2021
Yes, the first batch of oils (Pennzoil Ultra, before the brand broke them into two camps) had excellent and extremely low Noack. That changed when the PUP and PP split happened, not sure why?What about NOACK performance between the two? Back when Pennzoil first starting using GTL I remember this place going nuts over how incredible SOPUS's NOACK was.
Noack is far closer between the two than cold temp performance:
GTL 4 has a Noack of 12%, PAO 12 has a Noack of 12%
GTL 5 has a Noack of 9%, PAO 5 has a Noack of 6.8%
GTL 8 has a Noack of 2% PAO 8 has a Noack of 4.1%