I don't know if they use any moly in their various formulations but you really don't hear much mention about QS on this board (well not lately anyways). My opinion was always that it was a mediocre (not bad, but not awesomes either) brand that just caught on in the Heartland with farmers and everyday common folk because Nascar guys used it and such then that got passed down because "Grandpa always used QS and changed every 3000 miles so thats the way to treat your car" This may not be the way it went but I always assumed it did. Myself I have been fond of Castrol when not using a synthetic, and Kendall (another Penn State oil) doesn't look too bad. Castrol GTX by the way contains Moly these days, just ask Patman about it.