| (19) |
 |
|
(11) |
EP 2 011 855 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
28.07.2010 Bulletin 2010/30 |
| (43) |
Date of publication A2: |
|
07.01.2009 Bulletin 2009/02 |
| (22) |
Date of filing: 27.06.2008 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL
PT RO SE SI SK TR |
|
Designated Extension States: |
|
AL BA MK RS |
| (30) |
Priority: |
28.06.2007 JP 2007170667
|
| (71) |
Applicant: Chevron Texaco Japan Ltd. |
|
Tokyo, 101-0041 (JP) |
|
| (72) |
Inventors: |
|
- Takeuchi, Yoshitake
Shizuoka-ken (JP)
- Muramatsu, Takahiro
Shizuoka-Ken (JP)
- Tamashita, Yoshito
Tokyo, Japan 146-092 (JP)
- Nakazato, Morikuni
Shizuoka-Ken (JP)
|
| (74) |
Representative: Nash, David Allan |
|
Haseltine Lake LLP
Redcliff Quay
120 Redcliff Street
Bristol
BS1 6HU
Bristol
BS1 6HU (GB) |
|
| |
|
| (54) |
Fuel economy lubricating oil compositon for lubricating diesel engines |
(57) A lubricating oil composition for internal combustion engines comprising a base oil
having and lubricating viscosity and additives composed of a) a salt of an alkali
metal or alkaline earth metal and an alkylsalicylate and/or an alkylcarboxylate, b)
a nitrogen atom-containing ashless dispersant and/or a nitrogen atom-containing dispersive
viscosity index improver, c) a neutral salt of a fatty acid and a fatty amine, and
d) oxidation inhibitor, is effective for lubricating diesel engines using a low sulfur-content
fuel, even though it has a low sulfated ash content, a low sulfur content and a low
phosphorus content.