This listing is for (6) 4oz Bottles 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 ZDDPlusTM, in your car's motor oil. Add a 4 oz bottle of ZDDPlusTM to every 4- to 5-quart oil change. Just one bottle of ZDDPlusTM bring the current available "SM" oil (synthetic or conventional) back to the "SF" specifications. - One bottle of ZDDPlusTM 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 ZDDPlusTM per oil change with SM oil is more economical than 5 quarts of exotic oil. - Treats 5 quarts of oil. 4oz bottle Click HERE for more information on Zinc oil additives and ZDDP!
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