Esters, AO's, ashless AW additives etc. PP has esters too btw.
PP has such value and performance because they use Shells famous Group III base oils in conjunction with a top notch additive package. The Group III+ base oil they use may not be good for 20k miles, but for reasonable drain intervals it will hold up as good as any PAO based oil IMO. UOA's show this to be the case.
Buster, help me out on this.
I found this MSDS sheet for 5W-30 Pennzoil Platinum
and have identified the following ingredients:
Distillates (petroleum), hydrotreated light paraffinic
Zinc alkyl dithiophosphate
It also says: "Blend of polyolefins and additives"
How do you identify Ester content in Pennzoil Platinum?