This disclosure provides a method for improving or maintaining antioxidant performance of a lubricating oil in an engine or other mechanical component lubricated with the 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 at least one functionalized quercetin antioxidant, as a minor component. The at least one functionalized quercetin antioxidant is soluble in the lubricating oil. Antioxidant performance is improved or maintained as compared to antioxidant performance achieved using a lubricating oil containing a phenolic or aminic antioxidant, as determined by Lubricant Oxidation Test as described herein or Catalytic Oxidation Test as described herein. This disclosure also relates to lubricating oils having at least one functionalized quercetin antioxidant. The lubricating oils are useful as passenger vehicle engine oils (PVEO), commercial vehicle engine oils (CVEO), and other mechanical industrial applications.

Levulinic-capped estolides having improved physical properties that make them more desirable and suitable as bio-based industrial or commercial products are disclosed. The physical properties of the disclosed estolide compositions have surprisingly low pour points that are substantially lower than previously known estolide compounds and superior to petroleum-based compounds designed for similar applications.

Levulinic-capped estolides having improved physical properties that make them more desirable and suitable as bio-based industrial or commercial products are disclosed. The physical properties of the disclosed estolide compositions have surprisingly low pour points that are substantially lower than previously known estolide compounds and superior to petroleum-based compounds designed for similar applications.

This application relates to branched diester compositions that can be used as a base stock for lubricant applications, or as a base stock blend component for use in a finished lubricant or for particular applications, and methods for making the same.

This application relates to branched diester compositions that can be used as a base stock for lubricant applications, or as a base stock blend component for use in a finished lubricant or for particular applications, and methods for making the same.

The use of a complex ester obtainable by esterification reaction between aliphatic linear or branched C.sub.2- to C.sub.12-dicarboxylic acids, aliphatic linear or branched polyhydroxy alcohols with 3 to 6 hydroxyl groups, and, as chain stopping agents, aliphatic linear or branched C.sub.1- to C.sub.30-monocarboxylic acids or aliphatic linear or branched monobasic C.sub.1- to C.sub.30-alcohols, as an additive in a fuel for minimization of power loss in the operation of an internal combustion engine with this fuel.

The use of a complex ester obtainable by esterification reaction between aliphatic linear or branched C.sub.2- to C.sub.12-dicarboxylic acids, aliphatic linear or branched polyhydroxy alcohols with 3 to 6 hydroxyl groups, and, as chain stopping agents, aliphatic linear or branched C.sub.1- to C.sub.30-monocarboxylic acids or aliphatic linear or branched monobasic C.sub.1- to C.sub.30-alcohols, as an additive in a fuel for minimization of power loss in the operation of an internal combustion engine with this fuel.

A manufacturing method of a lubricant composition includes mixing a composite ester A that contains polyester obtained by condensing trihydric or more polyhydric alcohol a1, a divalent or more polyvalent carboxylic acid a2, and at least one selected from monohydric alcohol a3 or a monovalent carboxylic acid a4, with a compound B having a hydroxyl number of greater than 50 mgKOH/g. A lubricant composition contains the composite ester A and the compound B.

This application relates to branched diester compositions that can be used as a base stock for lubricant applications, or as a base stock blend component for use in a finished lubricant or for particular applications, and methods for making the same.

This application relates to branched diester compositions that can be used as a base stock for lubricant applications, or as a base stock blend component for use in a finished lubricant or for particular applications, and methods for making the same.