Internal combustion engine lubricant
AssigneeExxonMobil Technology and Engineering Company
InventorsZhisheng Gao, Winfried Koch, Nicholas W. McBride, Dana J. Gary
Life of this patent
Estimating the term…
Abstract
A lubricant composition may be of use in lubrication of an internal combustion engine. A method of utilizing such a lubricant composition may include: lubricating an internal combustion engine using a lubricant composition comprising: from about 30.0 mass % to about 99.8 mass % of an oil base stock, based on a total mass of the lubricant composition, the oil base stock comprising at least one polyol ester; and from 1.0 mass % to 30.0 mass % polyisobutylene, based on a total mass of the lubricant composition; and combusting a fuel in the internal combustion engine.
Claims24
A method comprising:
- lubricating an internal combustion engine using a lubricant composition comprising:
- from about 30.0 mass % to about 99.8 mass % of an oil base stock, based on a total mass of the lubricant composition, the oil base stock comprising at least one polyol ester;
- and
- from 1.0 mass % to 30.0 mass % polyisobutylene, based on a total mass of the lubricant composition,
- wherein the polyisobutylene is a viscosity modifier having a molecular weight ranging from about 10,000 Da to about 1,500,000 Da and a kinematic viscosity (ASTM D445) from 1000 cSt to 6000 cSt at 100° C.;
- and
- combusting a fuel in the internal combustion engine.
A lubricant composition for use as an engine oil, comprising:
- from about 30.0 mass % to about 99.8 mass % of an oil base stock, based on a total mass of the lubricant composition, the oil base stock comprising at least one polyol ester;
- from about 0.1 mass % to about 5.0 mass % of at least one detergent, based on the total mass of the lubricant composition;
- and
- from 1.0 mass % to 30.0 mass % polyisobutylene, based on a total mass of the lubricant composition;
- wherein the polyisobutylene is a viscosity modifier having a molecular weight ranging from about 10,000 Da to about 1,500,000 Da and a kinematic viscosity (ASTM D445) from 1000 cSt to 6000 cSt at 100° C.;
- and
- wherein the lubricant composition comprises about 0.05 mass % or less ash.
A lubricant composition for use as an engine oil, comprising:
- from about 30.0 mass % to about 99.8 mass % of an oil base stock, based on a total mass of the lubricant composition, wherein the oil base stock has a kinematic viscosity (ASTM D445) of from 1 cSt to 10 cSt at 100° C.;
- from about 0.1 mass % to about 5.0 mass % of at least one detergent, based on the total mass of the lubricant composition;
- and
- from 1.0 mass % to 30.0 mass % polyisobutylene, based on a total mass of the lubricant composition;
- wherein the polyisobutylene is a viscosity modifier having a molecular weight ranging from about 10,000 Da to about 1,500,000 Da and a kinematic viscosity (ASTM D445) from 1000 cSt to 6000 cSt at 100° C.;
- and
- wherein the lubricant composition comprises about 0.05 mass % or less ash.
Dependencies are inferred from the claim text.