LUBRICANT OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINE

Title:

LUBRICANT OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2014/010462

Kind Code:

A1

Abstract:

A lubricant oil composition for an internal combustion engine, which has an excellent function as an engine oil for an internal combustion engine employing heat management and particularly has an excellent fuel-saving property and an excellent cleaning property. As the lubricant oil composition, a lubricant oil composition for an internal combustion engine is provided, which comprises (A) a base oil having a kinematic viscosity of 3.0 to 5.0 mm2/s at 100°C, (B) boronated succinic acid imide in an amount of 0.007 wt% or more in terms of boron element content relative to the whole amount of the composition and in an amount of 5 mass% or less in terms of succinic acid imide ashless dispersant content, (C) a phenolic antioxidant agent in an amount of 0.5 mass% or more, and (D) a viscosity index improver having a ratio of the weight average molecular weight thereof to the PSSI thereof of 1.2 × 104 or more in an amount of 0.1 to 5 mass%, and has an HTHS viscosity of 2.0 to 2.8 mPa·s at 150°C, an HTHS viscosity of 4.8 mPa·s or less at 100°C and a viscosity index of 180 or more.

Inventors:

MIYAMOTO HIROYA (JP)

Application Number:

PCT/JP2013/068093

Publication Date:

January 16, 2014

Filing Date:

July 02, 2013

Export Citation:

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Assignee:

JX NIPPON OIL & ENERGY CORP (JP)

International Classes:

C10M129/10; C10M169/04; C10M133/56; C10M139/00; C10N20/02; C10N20/04; C10N30/04; C10N30/06; C10N40/25

Domestic Patent References:

WO2005037967A1

2005-04-28

Foreign References:

JP2009167278A	2009-07-30
JP2008239762A	2008-10-09
JP2009127029A	2009-06-11
JP2011140573A	2011-07-21
JP2009235258A	2009-10-15
JP2010031082A	2010-02-12
JPS428013B1
JPS428014B1
JPS5152381A	1976-05-08
JPS51130408A	1976-11-12

Other References: