| (19) |
 |
|
(11) |
EP 0 699 739 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
19.03.1997 Bulletin 1997/12 |
| (43) |
Date of publication A2: |
|
06.03.1996 Bulletin 1996/10 |
| (22) |
Date of filing: 04.09.1995 |
|
| (51) |
International Patent Classification (IPC)6: C10M 141/10
// (C10M141/10, 135:18, 135:20, 137:10), C10N30:06 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
05.09.1994 JP 211264/94
|
| (71) |
Applicants: |
|
- JAPAN ENERGY CORPORATION
Minato-ku,
Tokyo (JP)
- TOYOTA JIDOSHA KABUSHIKI KAISHA
Aichi Prefecture 471 (JP)
|
|
| (72) |
Inventors: |
|
- Naitoh, Yasushi,
c/o Japan Energy Corp.
Toda City,
Saitama Pref. (JP)
- Akiyama, Kenyu
Toyota City,
Aichi Pref. (JP)
|
| (74) |
Representative: Hansen, Bernd, Dr. Dipl.-Chem. et al |
|
Hoffmann, Eitle & Partner,
Patentanwälte,
Arabellastrasse 4
D-81925 München
D-81925 München (DE) |
|
| |
|
| (54) |
Engine oil composition |
(57) An engine oil composition is composed of: (1) at least one oil selected from the
group consisting of a mineral oil and a synthetic lubricant as a base oil; (2) a molybdenum
dithicarbamate in an amount of 50 to 2000 ppm by weight when calculated as molybdenum
(Mo), relative to the total weight of the engine oil composition; (3) zinc dithiophosphate
in an amount of 0.01 to 0.2 wt% when calculated as phosphorus (P), relative to the
total amount of the engine oil composition; and (4) an ashless organic polysulfide
compound in an amount of 0.01 to 0.4 wt% when calculated as sulfur (S), relative to
the total amount of the engine oil composition.