The Lubrizol Corporation

Chevron U.s.a. Inc.

Hyun-Soo Hong

John A Zakarian

Naresh Chand Mathur

Tomoya Higuchi

Farrukh Qureshi

Sona Sivakova

Christopher Engel

Ichiro Minami

John Aleksonis Zakarian

Described herein is a process, comprising: a) selecting an API Group II base stock with selected viscosity index and pour point; b) blending a base oil with the base stock, and c) adding to the base oil: i) a liquid ethylene propylene copolymer viscosity modifier that reduces a traction coefficient, and ii) an additive package, to make a driveline fluid that has a defined viscosity index and excellent shear stability. Also provided is a driveline fluid composition having the high viscosity index and excellent shear stability, comprising: a) a base oil comprising from 50 wt % to 100 wt % API Group II base stock; b) a liquid ethylene propylene copolymer viscosity modifier that reduces a traction coefficient; and c) an additive package. Further provided is a method for lubricating an axle or manual transmission by supplying the driveline fluid composition.

Driveline fluids comprising API group II base oil

A composition of an oil of lubricating viscosity, a phosphorus compound represented by the formula ##STR1## and tautomers thereof, where each X is independently O or S, and an olefin of about 6 to about 30 carbon atoms exhibits improved antiwear performance.

Antiwear compositions containing phosphorus compounds and olefins

Hybrid engines containing a metal-ceramic interface can be lubricated with composition comprising a carrier fluid and a molybdenum thiocarbamate. Friction and wear are low even when detergent and dispersant additives are present in the lubricant.

Thiocarbamates for metal/ceramic lubrication

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Moreland Hills, OH, United States of America

Hyun-Soo Hong