i read Mobil 1 ESP 0w30 msds and i see very little of esters almost 1%, almost 10% PAO and a big amount of GTL.
https://seattleautomotive.com/files/SDS/MOBIL 1 ESP 0W-30_124547.pdf
1-DECENE, TETRAMER AND TRIMER HYDROGENATED 68649-12-7 5 - < 10% that is PAO
PHOSPHORODITHIOIC ACID, MIXED 0,0 BIS (1,3- 84605-29-8 0.1 - < 1% that is esters
DISTILLATES, HEAVY, C18-50 - BRANCHED, CYCLIC 848301-69-9 848301-69-9 30 - < 40%, that is GTL
i expected more PAO/ester analogy? for a pao/ester called oil.it seems it is more a gtl oil