Exxonmobil Research and Engineering Company

Dennis A Gaal

Douglas Edward Deckman

Erik Herz

Mrugesh Nilesh Patel

Stephen A Geibel

Eric Bart Sirota

Michael B Whitlock

Jason Zhisheng Gao

James William Gleeson

Charles L Baker

Mark F Hurwitz

Samuel C Bainbridge

Smruti A Dance

Min Chang

David Mentzer

John E Gallagher, Jr

Tomasz M Young

Norman G Cathcart

Tore H Lindstrom

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 improving fuel efficiency and reducing frictional properties while maintaining or improving deposit control, in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including from 75 to 95 wt % of lubricating oil base stock including a Group I base stock or a combination of a Group III, Group IV and Group V base stock including from 30 to 35 wt % Group III, 45 to 55 wt % Group IV and 0 to 5 wt % Group V and a friction modifier mixture comprising a polymeric ethoxylated fatty acid ester at from 0.1 to 1.0 wt. % and a mixed glyceride ester at from 0.1 to 1.0 wt. % of the formulated oil. The lubricating engine oils are useful in internal combustion engines including direct injection, gasoline and diesel engines.

Method for improving engine fuel efficiency

A method for improving fuel efficiency and reducing frictional properties, while maintaining or improving deposit control, in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and a combination of (i) a friction modifier mixture and (ii) a detergent, as a minor component. Fuel efficiency and friction reduction properties are improved and deposit control is maintained or improved as compared to friction reduction properties and deposit control achieved using a lubricating engine oil containing a minor component other than the combination of the friction modifier mixture and detergent. A lubricating engine oil having a composition including a lubricating oil base stock as a major component, and a combination of (i) a friction modifier mixture and (ii) a detergent, as a minor component.

The present invention is a process for removing waxy haze from and improving the filterability of base stocks including heavy mineral oil base stocks, gas-to-liquids (GTL) and hydrodewaxed or hydroisomerized waxy feed basestocks by filtering the waxy haze causing particles out of the base stock employing a filter characterized by a high surface area of pores accessible to the haze wax particles which have particles dimensions of no more than about 5 microns.

Method for haze mitigation and filterability improvement for base stocks

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Glassboro, NJ, United States of America

Dennis A Gaal