Basf Se Corporation

Cognis IP Management Gmbh

Ronny Rinklieb

Markus Scherer

Dirk Rettemeyer

The presently claimed invention is directed to novel polyesters which are obtainable by reacting a mixture comprising at least one C8-C20 Guerbet alcohol, at least one aliphatic or cycloaliphatic dicarboxylic acid and at least one polyol with a hydroxyl functionality in the range of &#x2265;2 to &#x2264;6 and the use of these polyesters as a component of lubricating oil compositions.

Polyester and use of polyester in lubricants

Suggested is a method for enhancing energy efficiency of engines by applying to said engines a lubricant composition containing (A) carboxylic esters derived from the reaction of mono-, di- and/or poly alcohols with mono- and/or dicarboxylic acids, together with an additive blend (B) comprising at least two different additives (a) and (b) together, whereby compound (a) is selected from dithiophosphates, and compound (b) is selected from alkylated phosphorothionates, on condition that the total amount of the additive blend (B) is below 0.1 wt %, calculated on the weight of the whole composition.

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Düsseldorf, Germany

Ronny Rinklieb