Patent ID: 8664171

Claim:
A process for reducing friction in an oil-lubricated application using a blend of at least one nitrated moiety with at least one other moiety containing sulfur, phosphorus or combinations thereof comprising the steps of: adding to an hydrocarbon oil of lubricating viscosity from about 2% to 75% by weight of an additive comprising: at least one nitrated soybean oil, formed by reacting with a nitrating agent selected from the group consisting of nitric acid and nitrogen dioxide, and adding at least one non-chlorine containing moiety to said additive, a combination of said non-chlorine containing moiety and said nitrated soybean oil, improving a performance of said additive in at least one physical characteristic when compared to using said additive without said combination, said at least one non-chlorine containing moiety selected from the group consisting of a sulfur-containing moiety, a phosphorus-containing moiety and a moiety containing both sulfur and phosphorus, and further wherein said sulfur-containing moiety comprises at least one of an alkyl sulfamate, an alkyl sulfonate and a polysulfide and wherein said phosphorus-containing moiety comprises at least one of a phosphate ester and an phosphite and wherein said moiety containing both sulfur and phosphorus comprises at least one of a thiophosphate, a zinc thiophosphate and a zinc dithiophosphate.