# US 10,479,956 B2 · Non-newtonian engine oil with superior engine wear protection and fuel economy

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- Number: US 10,479,956 B2
- Document ID: US10479956B2
- Status: Granted
- Kind: B2
- Application number: 15/703,117
- Filed: 2017-09-13
- Published: 2018-04-26
- Granted: 2019-11-19
- Earliest claimed: 2016-09-20
- Assignees: ExxonMobil Research and Engineering Company
- Applicants: ExxonMobil Research and Engineering Company
- Inventors: Nancy Ortiz; Douglas E. Deckman; Kevin J. Kelly; David G. L. Holt; Haris Junuzovic; Camille A. Killian
- Web page: https://patentgrep.com/patent/US10479956B2

## CPC

- C10M 169/044: {the additives being a mixture of non-macromolecular and macromolecular compounds}
- C10M 101/00: Lubricating compositions characterised by the base-material being a mineral or fatty oil (containing more than 10% water C10M173/00)
- C10M 129/95: Esters
- C10M 135/22: containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M 143/12: containing conjugated diene
- C10M 161/00: Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
- C10M 171/02: Specified values of viscosity or viscosity index
- C10M 2203/003: used as base material
- C10M 2203/1025: used as base material
- C10M 2205/022: Ethene
- C10M 2205/026: Butene
- C10M 2205/028: containing aliphatic monomers having more than four carbon atoms
- C10M 2205/04: containing aromatic monomers, e.g. styrene
- C10M 2205/06: containing conjugated dienes
- C10M 2205/173: used as base material
- C10M 2205/22: Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts
- C10M 2205/223: used as base material
- C10M 2207/0406: used as base material
- C10M 2207/125: having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M 2207/24: Epoxidised acids; Ester derivatives thereof
- C10M 2207/2805: used as base material
- C10M 2207/289: containing free hydroxy groups
- C10M 2207/34: Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
- C10M 2207/40: Fatty vegetable or animal oils
- C10M 2209/084: Acrylate; Methacrylate
- C10M 2215/04: having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M 2219/024: of esters, e.g. fats
- C10M 2219/068: Thiocarbamate metal salts
- C10M 2223/045: Metal containing thio derivatives
- C10M 2227/06: Organic compounds derived from inorganic acids or metal salts
- C10M 2227/066: derived from Mo or W
- C10N 2020/01: {Physico-chemical properties}
- C10N 2020/073: {Star shaped polymers}
- C10N 2020/077: {Ionic Liquids}
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2030/54: {Fuel economy}
- C10N 2030/68: {Shear stability}
- C10N 2040/25: Internal-combustion engines
- C10N 2040/252: {Diesel engines}
- C10N 2040/255: {Gasoline engines}
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

Provided is a non-Newtonian engine oil lubricant composition with improved fuel efficiency and engine wear protection. The lubricant composition includes a major amount of a base oil including a Group II base stock and an optional Group V base stock, from 0.1 to 9.0 wt. % of at least one viscosity modifier and from 0.1 to 1.2 wt. % of at least one friction modifier. The non-Newtonian engine oil lubricant composition has a kinematic viscosity at 100 deg. C. of less than or equal to 10 cSt and an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C. Also provided are methods of using the lubricant composition in internal combustion engines and methods of making the lubricant composition.

## Claims

### Claim 1

A non-Newtonian engine oil lubricant composition comprising about 78.48 to 78.72 wt. % of a 3 cSt at 100° C. Group II base stock, about 1.08 wt. % of a 4 cSt at 100° C. Group IV base stock and about 5.4 wt. % of 4 cSt at 100° C. Group V base stock, about 0.12 wt. % of a styrene isoprene block type viscosity modifier, about 0.15 to 0.85 wt. % of a friction modifier selected from the group consisting of molyalkylthiocarbamide, ethoxylated fatty ester, and combinations thereof and about 13.83 to 14.09 wt. % of other engine oil additives, based on the total weight of the lubricant composition, wherein the non-Newtonian engine oil lubricant composition has a kinematic viscosity at 100 deg. C. of less than or equal to 4.66 cSt, an average High Frequency Reciprocating Rig (HFRR) wear scar of less than or equal to 165 um and an HTHS (ASTM D4683) of less than or equal to 1.8 cP at 150° C.

### Claim 2 (depends on 1)

The lubricant composition of claim 1, wherein the non-Newtonian engine oil lubricant composition provides an inlet and outlet cam shaft wear via the M-271 engine wear test of less than or equal to 5 um.

### Claim 3 (depends on 1)

The lubricant composition of claim 1, wherein the Group II base stock is selected from the group consisting of a Gas-to-Liquids (GTL) base stock, a hydroprocessed base stock and combinations thereof.

### Claim 4 (depends on 3)

The lubricant composition of claim 3, wherein the Group II base stock is a Gas-to-Liquids (GTL) base stock.

### Claim 5 (depends on 1)

The lubricant composition of claim 1, wherein the Group IV base stock is PAO.

### Claim 6 (depends on 1)

The lubricant composition of claim 1, wherein the Group V base stock is an ester base stock.

### Claim 7 (depends on 1)

The lubricant composition of claim 1 wherein the other engine oil additives comprise one or more of an anti-wear additive, dispersant, antioxidant, detergent, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, and anti-rust additive.

### Claim 8 (depends on 1)

The lubricant composition of claim 1, wherein the engine oil is a direct injection engine oil, a gasoline engine oil or a diesel engine oil.

### Claim 9 (depends on 1)

The lubricant composition of claim 1, wherein the composition meets the specifications of a 0W-4, 0W-8, and 0W-12 viscosity grade engine oil.

### Claim 10 (depends on 1)

The lubricant composition of claim 1, wherein the Worldwide Harmonized Light Vehicles Test Cycle fuel economy % with an Audi A4 gasoline engine is less than or equal to 0.50.

### Claim 11

A method for improving fuel efficiency and engine wear protection in an engine lubricated with a lubricating oil by using as the lubricating oil a non-Newtonian engine oil lubricant composition, said lubricant composition comprising about 78.48 to 78.72 wt. % of a 3 cSt at 100° C. Group II base stock, about 1.08 wt. % of a 4 cSt at 100° C. Group IV base stock and about 5.4 wt. % of 4 cSt at 100° C. Group V base stock, about 0.12 wt. % of a styrene isoprene block type viscosity modifier, about 0.15 to 0.85 wt. % of a friction modifier selected from the group consisting of molyalkylthiocarbamide, ethoxylated fatty ester, and combinations thereof and about 13.83 to 14.09 wt. % of other engine oil additives, based on the total weight of the lubricant composition, wherein the non-Newtonian engine oil lubricant composition has a kinematic viscosity at 100 deg. C. of less than or equal to 4.66 cSt, an average High Frequency Reciprocating Rig (HFRR) wear scar of less than or equal to 165 μm and an HTHS (ASTM D4683) of less than or equal to 1.8 cP at 150° C.

### Claim 12 (depends on 11)

The method of claim 11, wherein the non-Newtonian engine oil lubricant composition provides an inlet and outlet cam shaft wear via the M-271 engine wear test of less than or equal to 5 μm.

### Claim 13 (depends on 11)

The method of claim 11, wherein the Group II base stock is selected from the group consisting of a Gas-to-Liquids (GTL) base stock, a hydroprocessed base stock and combinations thereof.

### Claim 14 (depends on 13)

The method of claim 13, wherein the Group II base stock is a Gas-to-Liquids (GTL) base stock.

### Claim 15 (depends on 11)

The method of claim 11, wherein the Group IV base stock is PAO.

### Claim 16 (depends on 11)

The method of claim 11, wherein the Group V base stock is an ester base stock.

### Claim 17 (depends on 11)

The method of claim 11 wherein the other engine oil additives comprise one or more of an anti-wear additive, dispersant, antioxidant, detergent, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, and anti-rust additive.

### Claim 18 (depends on 12)

The method of claim 12, wherein the engine is an internal combustion engine selected from the group consisting of a direct injection engine, a gasoline engine, and a diesel engine.

### Claim 19 (depends on 12)

The method of claim 12, wherein the composition meets the specifications of a 0W-4, 0W-8, and 0W-12 viscosity grade engine oil.

### Claim 20 (depends on 11)

The method of claim 11, wherein the Worldwide Harmonized Light Vehicles Test Cycle fuel economy % with an Audi A4 gasoline engine is less than or equal to 0.50.

### Claim 21

A method of making a non-Newtonian engine oil lubricant composition comprising:
blending from about 78.48 to 78.72 wt. % of a 3 cSt at 100° C. Group II base stock, about 1.08 wt. % of a 4 cSt at 100° C. Group IV base stock and about 5.4 wt. % of 4 cSt at 100° C. Group V base stock, about 0.12 wt. % of a styrene isoprene block type viscosity modifier, about 0.15 to 0.85 wt. % of a friction modifier selected from the group consisting of molyalkylthiocarbamide, ethoxylated fatty ester, and combinations thereof and about 13.83 to 14.09 wt. % of other engine oil additives, based on the total weight of the lubricant composition, to form the non-Newtonian engine oil lubricant composition,
wherein the non-Newtonian engine oil lubricant composition has a kinematic viscosity at 100 deg. C. of less than or equal to 4.66 cSt, an average High Frequency Reciprocating Rig (HFRR) wear scar of less than or equal to 165 μm and an HTHS (ASTM D4683) of less than or equal to 1.8 cP at 150° C.

### Claim 22 (depends on 21)

The method of claim 21, wherein the non-Newtonian engine oil lubricant composition provides an inlet and outlet cam shaft wear via the M-271 engine wear test of less than or equal to 5 μm.