Take the below for what you want, I am not making these statements, I am merely passing on what I was told.... I've been wondering whether its safe to mix M1 SUV or Delvac 1 containing no moly with oils or additives that contain moly, lots of people do this, such as delvac 1 + redline brews, but i was wondering if there was a reason why mobil did not put moly in their delvac/suv oil. I spoke to one of their technical engineers and was told that it is totally safe to mix Moly with the oil, that they do not use it because of a different formulation that makes it not necessary. He would not tell me what this different formulation was, I asked him if the SUV/Delvac 1 oils have more Esters than SS, but he said he cannot release this information, and when asked if Delvac 1 and SUV are the same oil he said that they are very similar in their composition. I hate these people, why cant they just tell us everything in the oil, like a food label you know!