SK Speed Part Number: KIR7176

If your engine was designed prior to the 1990s, the non-roller lifters (flat-tappet cams) require ZDDP in the motor oil to avoid premature deterioration. Don’t let the lifters run metal-to-metal. Keep ZDDP, via ZDDPlus™, in your car’s motor oil. Add a 4 oz bottle of ZDDPlus™ to every 4- to 5-quart oil change. Just one bottle of ZDDPlus™ bring the current available “SM” oil (synthetic or conventional) back to the “SF” specifications.

- On bottle of ZDDPlus™ contains more ZDDP than two bottles of GM’s EOS.

- Safe, proven ZDDP EP agent takes the worry out of using new oil formulas in classic engines.

- Restores ZDDP to the optimum level which existed when your classic car or muscle car was new.

- Turns modern SM quality oil into the ideal oil for older cars, trucks, tractors, motorcycles, boats, etc.

- Compatible with ALL high-quality oils, standard or synthetic. You choose your own type of oil.

- Reduces cam and lifter wear in high-performance flat-tappet engines compared to a SM rated oil.

- One 4 oz. bottle of ZDDPlus™ per oil change with SM oil is more economical than 5 quarts of exotic oil.

- Treats 5 quarts of oil.

4oz bottle