The Hughes additve, our additive, is a soluble moly. When we researched this subject a few years ago a lot of the chemist at the oil companies were telling us that adding a ZDDP package to shelf oil is not the same as when they actually blend it in during the oil making process. The oil companies did not like the idea of putting Zinc additives into the crank case. This is how we were steered to soluble moly which can be added to the crankcase and will blend and stay in supsension with the oil, any oil. That all being said, I agree with whoever said to just buy a good oil and steer clear of additives. That is always the best way to go. We have our own Racing oil and AMSOIL, Brad Penn, Valvoline's "Not for street use" oils and some others are all good...for now. The trick is to just be sure and keep up with changing formulations (Remember when Rotella was good?.
Oil companies tend to keep formulation changes pretty close to their chest.
Just remember how this whole Zinc, oil, flat cam situation started. The Nascar boys were having a lot of cam failures and couldn't figure out why. It took a lot of research and pressure by the S.A.E. and Richard Childress racing to finally get to what the real culprit was. Now we all know it was the oil companies changing their formulas without telling anyone.
We offer our Extreme Pressure Additive for guys that can't find the "Good" racing oils in their part of the world and don't want to pay to ship cases of oil. You can just buy a case of additve and buy any good shelf oil locally and you are good to go for 12 oil changes.