Multi-function additive for lubricating oils

A lubricating composition comprising:

• a major amount of an oil selected from natural and synthetic oils having viscosities in the range of from about 5 to about 26 centistokes at 100.degree. C., and from about 0.01 to about 10 weight percent of an additive having the formula Mo.sub.4 S.sub.4 L.sub.6, wherein L is an organo group selected from dithiocarbamates, dithiophosphates, dithiophosphinates, thioxanthates, and mixtures thereof and wherein the organo group has from about 1 to about 30 carbon atoms and when the ligand, L, is a dithiocarbamate having alkyl organo groups, the alkyl groups have greater than about 4 carbon atoms.

An additive concentrate for blending with lubricating oils to provide a lubricating composition having antiwear, antioxidant and friction reducing properties comprising:

• a hydrocarbon diluent and from about 1 to about 90 weight percent of an additive, based on the weight of diluent, the additive having the formula Mo.sub.4 S.sub.4 L.sub.6 wherein L is an organo group selected from dithiocarbamates, dithiophosphates, dithiophosphinates, thioxanthates, and mixtures thereof and wherein the organo group has from about 1 to about 30 carbon atoms and when the organo group is a dithiocarbamate having alkyl organo groups, the alkyl groups have greater than about 4 carbon atoms.