Ethyl Corporation

Ethyl Petroleum Additives, Inc.

Afton Chemical Intangibles LLC

Rodney I Barber

David K Walters

Roger M Sheets

Helen T Ryan

Jeffrey L Milner

David R Ellis

Craig R Paterson

Charles J Dain

Gear oils meeting GL-5 specifications are obtained by blending a base oil, a thermally stable phosphorus-containing anti-wear agent; and a metal-free sulfur-containing extreme-pressure agent; wherein the thermally stable phosphorus-containing anti-wear agent is present in an amount sufficient to provide from 100 to 350 ppm phosphorus to the formulated gear oil and wherein the metal-free sulfur-containing extreme-pressure agent is present in an amount sufficient to provide at least 10,000 ppm sulfur to the formulated gear oil and wherein the formulated gear oil contains 350 ppm of phosphorus or less.

Low phosphorus clean gear formulations

Use of at least one friction modifier to reduce micropitting of a metal surface, which comprises lubricating the metal surface with a lubricant composition comprising the at least one friction modifier, wherein the at least one friction modifier is selected such that micropitting is reduced when the metal surface is so lubricated.

Lubricating compositions

A lubricant composition comprising a major proportion of polyalkylene glycol of lubricating viscosity and a minor proportion dissolved therein of (a) at least one sulphur-containing antiwear or extreme pressure agent, (b) at least one amine salt of at least one partially esterified monothiophosphoric acid, and (c) at least one amine salt of at least one partially esterified phosphoric acid. Such compositions have improved resistance to wear, oxidative degradation and metallic corrosion.

Polyalkylene glycol lubricant compositions

Lubricant compositions, especially suitable for limited slip differentials, containing sulphur-containing extreme pressure or anti-wear agents, are improved by incorporation of a substituted succinimide friction modifier. The resulting compositions reduce the level of noise produced during operation of the differential.

Lubricant compositions

A lubricating oil composition for use in the crankcase of an internal combustion engine, having improved resistance to the formation of emulsion-sludge in the area under the engine rocker cover, which contains the combination of an oxyalkylated alkylphenol-formaldehyde condensation product and tetra polyoxyethylene polyoxypropylene derivative of ethylene diamine.

Lubricating composition containing emulsion-sludge inhibitors

A lubricating oil composition for use in the crankcase of an internal combustion engine, having improved resistance to the formation of emulsion-sludge in the area under the engine rocker cover, which contains the combination of an oxyalkylated alkylphenol-formaldehyde condensation product and an oxyalkylated trimethylolalkane.

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Bracknell, United Kingdom

Rodney I Barber