Exxonmobil Research and Engineering Company

Tomasz M Young

Jason Zhisheng Gao

Samuel C Bainbridge

Brian Bernard Filippini

Angela Stefana Galiano-Roth

Eugine Choi

David G L Holt

Dennis A Gaal

Allan R Barber

Eric M Bunnelle

According to the present disclosure, there is provided a high-temperature lubricant composition. The composition has an amount of an ester. The ester exhibits a kinematic viscosity at 100&#xb0; C. of 1 to 4 centistokes and a kinematic viscosity ratio at 150&#xb0; C./100&#xb0; C. of 0.6 or higher. The composition is at a temperature of 100&#xb0; C. to 150&#xb0; C. There is also another lubricating composition having the ester and a polymeric viscosity modifier. There are also methods for using the lubricating compositions in the crankcase of an engine.

Low viscosity ester lubricant and method for using

A method for preventing or reducing engine knock or pre-ignition in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition comprising at least one ester of a non-aromatic dicarboxylic acid. The at least one ester of a non-aromatic dicarboxylic acid preferably comprises at least one adipate ester (e.g., dialkyl adipate ester). A lubricating engine oil having a composition comprising at least one ester of a non-aromatic dicarboxylic acid (e.g., adipate ester). A fuel additive composition for use in a gasoline fuel composition or a diesel fuel composition. The gasoline fuel composition or the diesel fuel composition is used in a spark ignition internal combustion engine. The fuel additive composition comprises at least one ester of a non-aromatic dicarboxylic acid (e.g., adipate ester). The lubricating oils of this disclosure are particularly advantageous as passenger vehicle engine oil products.

Method for preventing or reducing engine knock and pre-ignition

The present invention relates to methods of lubricating a hydraulic motor by using a lubricating composition that contains a friction modifier selected from the group consisting of a fatty phosphite, a fatty imidazoline and combinations thereof and supplies improved motor efficiency performance. The invention further provides the lubricating compositions used therein.

Hydraulic oil compositions with improved hydraulic motor efficiency

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Philadelphia, PA, United States of America

Tomasz M Young