Zinc dialkyl dithiophosphates (ZDDPs) are very effective antiwear agents that are used as machine lubricants (e.g., greases, hydraulic oils, and motor oils), including applications in the automotive ...
Pellegrini, G., Antongiovanni, E., and Santi, R., Lab. Sper. Agric. Soc. Montecatini (1956).