Originally Posted by Virtus_Probi
Looking at the 5W30 SDS sheets, EP is shown to be 20-30% PAO, AP is 5-10%, ESP is 1-5%, PAO is not listed for ESP Formula, vanilla 5W30 is 20-30%, and HM is 5-10% PAO.
I hope none of these results were from old sheets, forgot to check the dates and I'm not opening them all again!
These are just so if there is a spill, fire or someone ingests it the first responders / crews know what they are working with. Exact amounts will never be listed for competitive reasons.
The only way to tell for sure is to reverse engineer it in a lab but that's a $1300 test I'm told.
It's cheaper to do trial and error and $10 Wix UOA's to establish a trend and best guess this way if the oil meets your performance level. I would have no problem betting the house on even the bottom basic M1 synthetic as XOM doesn't do anything 1/2 arsed and their billions in sales shows it.