RB Products manufactures and supplies an extensive line of additive componentry, designed to enhance end-product specifications. As part of our additive componentry line, we offer Zinc Dithiophosphate 7. RB ZD 7 is a zinc dialkyldithiophosphate lubricating oil additive. It is generally used with detergentâ€dispersant and acid neutralizing additives in engine oils. This additive provides oxidation, copperâ€lead bearing corrosion and wear control in diesel and gasoline engines. It is particularly effective under the severe temperature and load conditions encountered in highly supercharged diesel engines.