Motorcycle engine lubricant

Patent metadata

Field	Value
Publication number	US-9267092-B2
Application number	US-201214113475-A
Country	US
Kind code	B2
Filing date	Apr 25, 2012
Priority date	May 4, 2011
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A motorcycle having an engine and a clutch may be lubricated by supplying to the engine, but not to the clutch a lubricant of an oil of lubricating viscosity, an overbased detergent, a dispersant, a metal salt of a phosphorus acid, and a hydroxyalkyl-substituted imidazoline having a hydrocarbyl substituent of at least about 8 carbon atoms and a hydroxyalkyl substituent having 2 to 8 carbon atoms.

First claim

What is claimed is:

1. A method for lubricating a motorcycle having an engine and a clutch and having a displacement of greater than 200 and up to about 3500 cm 3 , comprising supplying to the engine thereof, but not to the clutch, a lubricant comprising
(a) an oil of lubricating viscosity
(b) an overbased detergent
(c) a dispersant
(d) 0.1 to 2 percent by weight of a metal salt of a phosphorus acid and (e) 0.1 to 2 percent by weight of a hydroxyalkyl-substituted imidazoline consisting of a material of the structure

where R is a hydrocarbyl substituent of at least about 8 carbon atoms.

2. The method of claim 1 wherein R is a branched or unbranched, saturated or unsaturated aliphatic hydrocarbon group of 8 to about 24 carbon atoms.

3. The method of claim 1 wherein the hydroxyalkyl-substituted imidazoline is represented by the formula

4. The method of claim 1 wherein the overbased detergent comprises an overbased calcium sulfonate detergent.

5. The method of claim 1 wherein the overbased detergent is present in an amount of about 0.6 to about 5 percent by weight.

6. The method of claim 1 wherein the dispersant comprises a succinimide dispersant.

7. The method of claim 1 wherein the dispersant is present in an amount of about 0.3 to about 6 percent by weight.

8. The method of claim 1 wherein the metal salt of a phosphorus acid comprises a zinc dialkyldithiophosphate.

9. The method of claim 1 wherein the motorcycle engine is a four-stroke cycle spark-ignited gasoline engine.

10. A method of lubricating an internal combustion engine, comprising supplying thereto the lubricant as described in claim 1 .

11. The method of claim 1 wherein the dispersant (c) does not contribute sulfated ash to the lubricant.

Assignees

• Wilkes Mark F
• Lubrizol Corp

Inventors

• Wilkes Mark F

Classifications

• C10N2030/06

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

• C10N2040/255

  Gasoline engines · CPC title

• C10M163/00

  Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential · CPC title

• C10M2215/28

  Amides; Imides · CPC title

• C10M2205/022

  Ethene · CPC title