ZDDP Oil Additive - Zinc for Flat Tappet Cams & Engine Break in (1)

A must have for vintage flat tapper engines.

According to last exprimental time this 15% Achieve servics not badly

Necessary for flat tappet cam engine. Used half of bottle as per instruction.

Put it in my old 1953 Ford Golden Jubilee

This is a high quality ZDDP product that does what it claims. I purchased it not for a performance application but to add an extra coating in my engine to high pressure areas because my engine has a design flaw with its roller arm cam followers and I wanted to give it the best chance at surviving a long life. I also wanted to use it in my young engine to aid in proper break-in. So far from my oil lab analysis results, before, during and after I can tell that it does infact add the ZDDP it claims, does increase break-in wear, but then also produces lower overall wear on subsequent oil changes where there is just engine oil alone. Also wanted to let everyone know, instead of buying pricey 4-stroke small engine oil for your yard equipment, buy a bottle of this and add it to a 5-quart regular automotive oil and get the same thing but for less expense!