I don't know why I don't post more often lol, there is always a post that answers my questions I guess!? But I do have a question I think I might just have to ask. I have some Oil that I acquired a while back here in St. Louis, and it's called Venom racing oil. It is manufactured by Hicks oil, out of Illinois. They claim that this 15w40 has 3,000 ppm of zinc. Now I know that's a crazy number, but what if you add it in as a zinc additive to a standard 800 ppm oil to raise that number from 1,200 to 1,500 ppm of Zddp? Considering the fact I have no cats on the exhaust. I wonder if it just might be crazy enough to work?? Lol