Title:
LOW-ASH ENGINE OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2007/119299
Kind Code:
A1
Abstract:
A low-ash engine oil composition which, despite the low ash content, has engine-cleaning performance which enables the composition to pass a severe detergency test for diesel engine oils. It further has excellent mileage-saving performance. The low-ash engine oil composition has a sulfated ash content of 0.6 mass% or lower, and is characterized by comprising: a lube base oil having a %CA of 2 or lower, a dynamic viscosity at 40°C of 25 mm2/s or lower, and a viscosity index of 120 or higher; a viscosity index modifier contained in such an amount that the composition has a viscosity index of 160 or higher; and (A) a metallic detergent having a metal ratio of 3 or lower and/or (B) a sulfur-free phosphorus compound.
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Inventors:
YAGISHITA KAZUHIRO (JP)
YAGUCHI AKIRA (JP)
KOMIYA KENICHI (JP)
YAGUCHI AKIRA (JP)
KOMIYA KENICHI (JP)
Application Number:
PCT/JP2007/053855
Publication Date:
October 25, 2007
Filing Date:
February 22, 2007
Export Citation:
Assignee:
NIPPON OIL CORP (JP)
YAGISHITA KAZUHIRO (JP)
YAGUCHI AKIRA (JP)
KOMIYA KENICHI (JP)
YAGISHITA KAZUHIRO (JP)
YAGUCHI AKIRA (JP)
KOMIYA KENICHI (JP)
International Classes:
C10M169/04; C10M101/02; C10M137/00; C10M145/14; C10M159/20; C10N10/12; C10N20/00; C10N20/02; C10N30/00; C10N30/04; C10N40/25
Domestic Patent References:
| WO2004003117A1 | 2004-01-08 | |||
| WO2004013264A1 | 2004-02-12 | |||
| WO2004013265A1 | 2004-02-12 | |||
| WO1998026030A1 | 1998-06-18 | |||
| WO1999031113A1 | 1999-06-24 | |||
| WO2005037967A1 | 2005-04-28 |
Foreign References:
| JP2005146011A | 2005-06-09 | |||
| JP3615267B2 | 2005-02-02 | |||
| JP2002294271A | 2002-10-09 | |||
| JP3662228B2 | 2005-06-22 | |||
| JP3709379B2 | 2005-10-26 | |||
| JP3738228B2 | 2006-01-25 | |||
| JP2004035619A | 2004-02-05 | |||
| JP2004035620A | 2004-02-05 | |||
| JP2004083891A | 2004-03-18 | |||
| JPS5610591A | 1981-02-03 | |||
| US4263152A | 1981-04-21 |
Other References:
See also references of EP 1997871A4
Attorney, Agent or Firm:
MORITA, Nobuyuki (5-8 Nishi-shimbashi 3-chome, Minato-k, Tokyo 03, JP)
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