Just having MOAR doesn't inherently make a product better. Too much phosphorus is corrosive for example, too much of some additives cause deposit issues. FM selection and concentration is based on balancing the intended effect (FM and complimenting the AW chemistry) with avoiding the creation of unwanted deposits.
Your typical OTS oil does not have much in the way of solvency. The base oils used are very "dry" and typically a small amount of a lower group oil, though sometimes esters or AN's are used, is added to provide sufficient solvency for the additive package. The intention is for the dispersants and detergents to
prevent deposits, the oils are not blended to clean up existing ones.
Infineum's work on trimer moly showed that the concentration could be greatly reduced when compared to dimer moly, while still providing the same effect. Ergo, this is why you see low levels of moly in companies that deal with infineum (Mobil, Shell).
While companies like
@High Performance Lubricants go balls-to-the-wall with FM chemistry, using trimer, dimer and even tungsten in varying doses, depending on what the testing yields for a given product during development, they are able to do this because their oils have extremely high levels of solvency, using both esters and AN's in their base oil blend. This gives them much more flexibility with respect to additive chemistry, because there is far lower risk of producing deposits.
