Exxonmobil Research and Engineering Company

Exxonmobil Chemical Patents Inc.

Mark D Winemiller

David Joseph Baillargeon

Douglas Edward Deckman

William L Maxwell

William H Buck

Norman Yang

Maria Caridad B Goze

The present invention concerns a detergent additive for lubricating oil compositions comprising at least two of low, medium, and high TBN detergents. Preferably the detergent is a calcium salicylate. The present invention also concerns lubricating oil compositions comprising such detergents, and at least one of Group II base stock, Group III base stock, or wax isomerate base stock.

Mixed TBN detergents and lubricating oil compositions containing such detergents

The present invention provides a viscosity index improving lubricant additive which comprises an olefinic oligomer of about 2,000 to about 20,000 number average molecular weight having a viscosity of 75 to about 3,000 cSt at 100&#xb0; C. and a hydrocarbyl aromatic which contains at least about 5% of its weight from aromatic moieties having a viscosity of about 3 to about 50 cSt at 100&#xb0; C. where the weight ratio of hydrocarbyl aromatic component to olefin oligomer is from about 1:2 to about 50:1. In another aspect, the invention provides for a lubricating oil composition comprising a base oil and the instant viscosity index improving additive.

Lubricating oil compositions

The present invention relates to a fully formulated lubicants comprising poly &#x3b1;-olefins (PAOs), prepared from a mixed &#x3b1;-olefin feed, which exhibit superior Noack volatility at low pour points, and methods for preparing the fully formulated lubricants. The fully formulated lubricants include PAOs that include mixtures of 1-decene and 1-dodecene. The PAOs may be prepared by polymerization/oligomerization using an alcohol promoted BFin conjunction with a combination of co-catalysts.

Functional fluid lubricant using low Noack volatility base stock fluids

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Clarksboro, NJ, United States of America

Mark D Winemiller