Many off-the-shelf oils contain molybdenum, a number of them in disulfide form. Mobil, Castrol, Pennzoil, and Quaker State all use it as an anti-friction/anti-wear additive. The Petroleum Quality Institute of America tests oils regularly, including additive content, and "moly" is one of the additives they test for. Their testing is often responsible for the removal of substandard motor oils from the market.
Here's their results for Mobil1 Advanced Fuel Economy 0w20 from earlier this year:
Mobil 1 SAE 0W-20 Full Synthetic API SN/ILSAC GF-5 dexos1
Quaker State Ultimate Durability has over three times as much as Mobil1.