It's somewhat amusing that in 2021 anyone on this forum has to wonder if Mobil 1 motor oil uses Trinuclear Molybdenum. I'm not saying this in a mean way. Please understand that ExxonMobil has no reason not to use it since, as
@OVERKILL already said, ExxonMobil co-owns Infineum with Royal Dutch Shell. In contrast, BP/Castrol has cross-licensing agreements with Infineum. Not only that, but Infineum's patent expired in 2016:
https://patents.google.com/patent/US6232276B1/en. So I wouldn't be surprised at all if Lubrizol, Afton Chemicals, and others are making additive packages for various blenders that contain Trinuclear Molybdenum additives. Castrol EDGE and EDGE EP (ILSAC oils) contain both Trinuclear Molybdenum and Titanium, and they work together in synergy. Please feel free to correct me if I'm wrong about this one.
I just uploaded the full PDF here:
https://workupload.com/file/nhUTYBWbkWv.
I hope this helps.