ZDDP "Zinc" Oil Additive

After 70+ years of trouble-free, metal-metal engine protection, the E.P.A. is forcing ZDDP (Zinc Dialkyl Dithio Phosphate, containing both Zinc and Phosphorus) from domestic motor oil. If your engine was designed prior to the 1990s, your non-roller lifters require ZDDP in your motor oil to avoid premature deterioration. Don’t let your lifters run metal-to-metal. Keep ZDDP, via ZDDPlus™, in your motor oil. Add 4 oz of ZDDPlus™ at every 4 to 5 quart oil change.