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Lubricating oil composition for automobile engine lubrication

a technology for automobile engines and lubricating oils, applied in the direction of lubricant compositions, liquid carbonaceous fuels, additives, etc., can solve the problems of insufficient wear resistance, achieve excellent wear resistance, improve the fuel efficiency of automobile engines, and reduce the viscosity of lubricating oils

Inactive Publication Date: 2015-06-25
CHEVRON JAPAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The lubricating oil composition provides excellent fuel efficiency and wear resistance, suitable for both motorcycle four-cycle gasoline engines and diesel engines with exhaust gas after-treatment devices, while maintaining low viscosity for improved engine performance.

Problems solved by technology

Nevertheless, fuel-efficient gasoline engine oils for four-wheel drive vehicles having an SAE viscosity grade of 5W20 cannot be expected to have a high-temperature, high-shear viscosity that is as high as 2.6 mPa·s and therefore, there is a problem in that when used as the engine oil of a motorcycle four-cycle gasoline engine that uses engine oil for lubrication of the transmission system, there is a problem in that wear resistance is insufficient.

Method used

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Examples

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Effect test

examples

[0064]The present invention is further described by the following illustrative non-limiting working examples.

examples 1 and 2

, Comparative Examples, and Reference Examples

(1) Production of Lubricating Oil Composition

[0065]The lubricating oil composition of the present invention (SAE viscosity grade: 5W20, high-temperature, high-shear viscosity: 2.9 mPa·s or higher) was produced (Examples 1 and 2) using the following base oil and additives (in the following amounts). Moreover, a lubricating oil composition having an SAE viscosity grade of 5W20 (high-temperature, high-shear viscosity of approximately 2.6 mPa·s) was produced as a comparative example and a lubricating oil composition having an SAE viscosity grade of 10W30 (high-temperature, high-shear viscosity of 2.9 mPa·s or higher) was produced as a reference example.

(2) Base Oil

[0066]Base oil1: Mixture (having viscosity index of 142, a dynamic viscosity at 100° C. of 4.9 mm2 / s, and NOACK evaporation loss of 10.1%) of mineral oil base oil a (having a viscosity index of 137, a dynamic viscosity at 100° C. of 4.1 mm2 / s, and a NOACK evaporation loss of 13.6%)...

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Abstract

Provided is a lubricating oil composition that is highly fuel-efficient and has high wear resistance and is particularly suited for lubrication of a motorcycle four-cycle gasoline engine or a diesel engine vehicle having an exhaust gas after-treatment device. The lubricating oil composition, which is a lubricating oil composition having an SAE viscosity grade of 5W20, comprises a base oil and predetermined amounts of additive components comprising of a nitrogen-containing ash-free dispersant, an alkali earth metal-containing detergent, a phosphorus-containing anti-wear agent, an antioxidant, and a viscosity index-improving agent, wherein the viscosity index is within a range of 140 to 230, the high-shear viscosity at 150° C. is 2.9 mPa·s or higher, and the NOACK evaporation loss is 13% or less.

Description

[0001]This patent application is a Divisional of U.S. patent application Ser. No. 13 / 786,555 filed on Mar. 6, 2013, and which claims priority to Japanese Patent Application number JP 2012-51849 which was filed on Mar. 8, 2012.FIELD OF INVENTION[0002]The present invention relates to an excellent fuel-efficient, low-viscosity lubricating oil composition for an automobile engine, and in particular, relates to a lubricating oil composition for automobile engine lubrication that, while being an excellent fuel-efficient, low-viscosity lubricating oil composition for engine lubrication, also shows high wear resistance. The present invention relates to a low-viscosity lubricating oil composition that is particularly suitable for lubricating a motorcycle four-cycle gasoline engine or a diesel engine having an exhaust gas after-treatment device.BACKGROUND OF INVENTION[0003]There is an increasing demand for improved fuel efficiency in automobiles. Therefore, there is a need for an excellent fu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M161/00
CPCC10M161/00C10M2203/1025C10M2205/022C10M2205/163C10M2205/173C10M2207/026C10M2207/028C10M2209/084C10M2215/064C10M2215/28C10M2219/022C10M2219/046C10M2223/045C10M171/02C10N2010/12C10N2030/54C10N2030/68C10N2030/74C10N2030/06C10N2040/252C10N2040/255C10N2040/25C10M2205/024C10N2020/02C10N2010/04C10N2060/14C10M125/24C10M125/20C10M169/06
Inventor ANDOH, HIROKINAKAZATO, MORIKUNI
Owner CHEVRON JAPAN
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