Afton Chemical Corporation

Ashutosh Gupta

Sheng Jiang

Kongsheng Yang

Joseph W Roos

Joseph Eugene Remias

Arturo Carranza

Ian A Bell

Kun Liu

Alexei Neverov

The present disclosure provides for methods of improving the performance of a combustion engine after-treatment device, such as particulate filters and/or three-way catalyst systems, over its useful life by using a lubricating oil composition including one or more base oils of lubricating viscosity and an additive package with increased amounts of least one oil-soluble silicon-containing compound.

Methods of improving the performance of combustion engine after-treatment devices

The present disclosure relates to lubricating compositions and methods of lubricating a spark-ignition engine effective to depress low-speed pre-ignition (LSPI) events and to maintain low foaming and/or aeration through selected silicon chemistries and treat rates.

Silicon-containing compounds for lubricants

A lubricating oil composition including a major amount of a base oil, one or more calcium-containing detergents to provide at least 1000 ppmw of calcium, and one or more silicon-containing compound(s) to provide at least 50 ppmw of silicon to the lubricating oil composition, all based on the total weight of the lubricating oil composition, wherein a ratio of ppmw of silicon provided by the one or more silicon-containing compound(s) to the lubricating oil composition to the ppmw of calcium provided by the one or more calcium-containing detergent(s) to the lubricating oil composition is from 0.02 to 1. Methods of using these compositions and silicon-containing detergents are also described.

Lubricant formulations with silicon-containing compounds

A multi-functional olefin copolymer viscosity index improver and a lubricating oil composition including such lubricant additive that provides improved viscometric properties and helps reduce low speed pre-ignition events at the same time. In one approach, the multi-functional olefin copolymer viscosity index improver is silicone functionalized and includes an acylated olefin copolymer with aminosilane or aminosiloxone pendant or side groups.

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Henrico, VA, United States of America

Ashutosh Gupta