REV-X ZINC Oil Additive is necessary for new engines with flat tappet cams/lifters to ensure proper break-in and long life. As REV X ZINC Oil Additive (ZDDP) is heated, it creates a film that coats the engine parts with an anti-wear layer.
This is my first experience using this product and I like it. I used it as an assemble lube when doing my engine rebuild. it is thick and sticks pretty well to any surface you apply it to. I will add the remainder into my crankcase while filling with fresh oil .