Patent ID: 7897549

Claim:
A lubricating composition comprising: a) a major portion of an oil of lubricating viscosity; and b) about 0.1 to 10% by mass of an antiwear additive comprising: 1) an organo borate ester composition formed by reacting about 1 mole fatty oil and about 1.8 moles diethanolamine, followed by subsequent reaction with boric acid, wherein the boron content of the organo borate ester composition is between about 0.6 and about 2.7% wt %, and wherein the amount of organo borate ester in the lubricating composition is less than about 1.0% by weight; and 2) an alkyl zinc dithiophosphate wherein the ratio of organo borate ester composition:alkyl zinc dithophosphate is from 1:15 to 15:1.