[Jake Raby]

Modern oils are trying to systematically advertise to the world that ZDDP is not needed, and can be substituted with other anti- wear packages just as well. I believe (and so do others) that this is from an economic stand point, as Zn is a very expensive additive.

Lubrizol is one of 4 companies in the world that make additive packages for oils, its a company that Warren Buffet brought. Lubrizol doesn't just formulate the additive packages for the Joe Gibbs oils, they also make the oil. Coincidentally, Lubrizol invented ZDDP in the 1940s.

I have changed one bad catalytic converter int he past 3 years, and we see about 100 of these cars per year. The cats simply do not fail, but if anyone needs one, I have a stack of good used ones thats 4' tall with all years and models represented.