Method for improving engine fuel efficiency

Patent metadata

Field	Value
Publication number	US-9506008-B2
Application number	US-201414219300-A
Country	US
Kind code	B2
Filing date	Mar 19, 2014
Priority date	Dec 23, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A method for improving fuel efficiency and reducing frictional properties, while maintaining or improving deposit control, in an engine lubricated with a 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 a combination of (i) a friction modifier mixture and (ii) a detergent, as a minor component. Fuel efficiency and friction reduction properties are improved and deposit control is maintained or improved as compared to friction reduction properties and deposit control achieved using a lubricating engine oil containing a minor component other than the combination of the friction modifier mixture and detergent. A lubricating engine oil having a composition including a lubricating oil base stock as a major component, and a combination of (i) a friction modifier mixture and (ii) a detergent, as a minor component.

First claim

What is claimed is:

1. A method for improving fuel efficiency and reducing frictional properties, while maintaining or improving deposit control, in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil, said formulated oil having a composition comprising a lubricating oil base stock comprising a mixture of Group III, Group IV and Group V base oils at from 84.01 to 85.51 wt. % of the formulated oil; and a combination of (i) a friction modifier mixture comprising 0.25 to 0.75 wt. % ethoxylated fatty ester friction modifier, and 0.1 to 0.25 wt. % borated glycerol mono-oleate friction modifier, and (ii) a detergent mixture comprising 1.0 to 3.0 wt. % petroleum derived calcium sulfonate and 2.5 to 3.0 wt % mixed calcium salicylate; and
wherein deposit control (as determined by TEOST 33C-SAE 932837 and SAE 962039) is less than or equal to 16 mg, and frictional performance (as determined by MTM at 140° C.) is less than or equal to 0.113.

2. A lubricating engine oil having a composition comprising a lubricating oil base stock comprising a mixture of Group III, Group IV and Group V base oils at from 84.01 to 85.51 wt. % of the formulated oil; and a combination of (i) a friction modifier mixture comprising 0.25 to 0.75 wt. % ethoxylated fatty ester friction modifier, and 0.1 to 0.25 wt. % borated glycerol mono-oleate friction modifier, and (ii) a detergent mixture comprising 1.0 to 3.0 wt. % petroleum derived calcium sulfonate and 2.5 to 3.0 wt % mixed calcium salicylate;
wherein deposit control (as determined by TEOST 33C-SAE 932837 and SAE 962039) is less than or e to 16 mg, and frictional performance (as determined by MTM at 140° C.) is less than or equal to 0.113.

3. The lubricating engine oil of claim 2 wherein the lubricating oil further comprises one or more of an anti-wear additive, viscosity index improver, antioxidant, detergent, dispersant, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, anti-rust additive, and a metal-containing organic complex friction modifier.

4. The lubricating engine oil of claim 2 wherein the lubricating oil is a passenger vehicle engine oil (PVEO).

Assignees

• Gaal Dennis A
• Herz Erik
• Patel Mrugesh Nilesh
• Deckman Douglas Edward
• Dance Smruti A
• Exxonmobil Res & Eng Co

Inventors

• Gaal Dennis A
• Herz Erik
• Patel Mrugesh Nilesh
• Deckman Douglas Edward
• Dance Smruti A

Classifications

• C10M2207/04

  Ethers; Acetals; Ortho-esters; Ortho-carbonates · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10M2207/281

  of (cyclo)aliphatic monocarboxylic acids · CPC title

• C10M2215/082

  containing hydroxyl groups; Alkoxylated derivatives · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title