I know the Moly Ep treatment is thicker than molasses-when bitog first started many moons ago-I remember a post where MolaKuke recommended mixing the Schaeffer moly with a product I think it was called Lube control-helped with oxidation of oil... I would only use the Schaeffer for an engine that may be experiencing some leaking or if you wanted to thicken the oil. I used a renewable lubricants booster package a few years ago and remember positive subjective experience with it-smoother acceleration in 2011 tdi I drove at the time. That additive package contained a lot of antimony and only used it with oils not containing moly-I remember MolaKuke writing something about having too much antimony and moly together were antagonistic-
generally best option is paying more for highest quality synthetic oil preference you have for your car. Again I am being hypocrite because I have used a lot of different additives-I tried to match additive with vehicle. For example tdi was a little laggy at times with acceleration so usually went for additives that lowered friction-lubeguard bio, renewable lubricants booster pack, and Liqui moly ceratec.