Originally Posted By: ZZman
Mobil 1 is a group 4? Are we going to go over this again? No one is sure what it is. They will not even say. It might be 100% PAO or 51%.
But staying on topic......Mobil 1 out of those 2 choices. Just run what the manufacturer says.
A check of the Mobil website shows at least 15 different formulations and weight combinations of Mobil 1. I suspect that the percentage of PAO varies, and I would expect a higher percentage PAO in the OW40, the EP's, and the High Mileage formulations, and maybe the truck formulations. "Mobil 1" really covers a wide range of different motor oils, and you need to specify which one you are referring to in any discussion of its propertys and virtues.