Phosphorus (P)

ADDITIVE:       

Function:     AW - (Anti-wear) additive (zinc dithiophosphate),
                  Antioxidant Phosphorus is added to extreme
                  pressure oils to provide a protective Film.
                  EP – (Extreme Pressure) oils are characterized by
                  high phosphorus.
                  FR – (Fire Resistant) additives (phosphate ester).

.

.