Title:
FUEL-EFFICIENT ENGINE OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2014/156306
Kind Code:
A1
Abstract:
As an engine oil composition having exceptional fuel-efficient performance, there is provided an engine oil composition characterized by containing, in a lubricant base oil having a saturated component of 70 mass% or above and a viscosity index of 90 or above, at least 4 mass%, based on the total amount of the engine oil composition, of a star-shaped polymer as a viscosity index improver, the ratio (B/A) of high-temperature, high-shear viscosity (B) at 1 × 107/s shear velocity and 100ºC to high-temperature, high-shear viscosity (A) at 1 × 106/s shear velocity and 100ºC being 0.85 or less.
Inventors:
YOSHIDA SATORU (JP)
Application Number:
PCT/JP2014/052494
Publication Date:
October 02, 2014
Filing Date:
February 04, 2014
Export Citation:
Assignee:
JX NIPPON OIL & ENERGY CORP (JP)
International Classes:
C10M169/04; C10M101/02; C10M143/12; C10N20/02; C10N30/00; C10N40/25
Foreign References:
| JP2012197399A | 2012-10-18 | |||
| JP2011132340A | 2011-07-07 | |||
| JPH06184580A | 1994-07-05 | |||
| JP2011219632A | 2011-11-04 | |||
| JP2010095665A | 2010-04-30 | |||
| JP2014051572A | 2014-03-20 | |||
| JP2010095662A | 2010-04-30 | |||
| JP2010095663A | 2010-04-30 | |||
| JP2010095664A | 2010-04-30 | |||
| US4116917A | 1978-09-26 | |||
| US4141847A | 1979-02-27 | |||
| US4346193A | 1982-08-24 | |||
| US4409120A | 1983-10-11 | |||
| JPS428013B1 | ||||
| JPS428014B1 | ||||
| JPS5152381A | 1976-05-08 | |||
| JPS51130408A | 1976-11-12 |
Other References:
See also references of EP 2980193A4
Attorney, Agent or Firm:
MORITA, NOBUYUKI (JP)
Yoriyuki Morita (JP)
Yoriyuki Morita (JP)
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