Review on Hy-Per Lube By Rislone ZDDP Supplement (4405-6PK) by Ryan Vaughn

This is a great product for the price, ZDDP is one of the cheapest and most effective wear prevention materials that can be added to engine oil. This engine oil additive makes SN rated oils suitable for OEM flat tappet use. Don't worry about this being a smaller bottle, vs. the 32 oz. bottle. The liquid is just a carrier oil for the zinc and phosphate additive, the less carrier oil the better. I only mention this because of a complaint someone had about the smaller bottle and felt they were cheated, the engine oil was actually better off by having less carrier oil to dilute the existing additive pack.