Over the Counter Zinc Additive

I would assume that since the rollers are not reporting problems with the new oils, then that new, lower level of ZDDP is OK. The new regulatory limit is 800 PPM and the new oils all seem to have 600-800 PPM.

BTW, FWIW, it is the phosphorus that is the problem in catalytics (from what I have read). Zinc and phosphous come together in ZDDP (Zinc Dialkyl Dithiophosphate), and the phosphous weight is about 94% of the zinc weight.