| (19) |
 |
|
(11) |
EP 0 286 996 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
18.01.1989 Bulletin 1989/03 |
| (43) |
Date of publication A2: |
|
19.10.1988 Bulletin 1988/42 |
| (22) |
Date of filing: 09.04.1988 |
|
| (51) |
International Patent Classification (IPC)4: C10M 169/04
// (C10M169/04, 101:02, 129:06, 129:26, 129:18, 129:16, 133:16, 135:00, 137:02, 137:04,
137:08), C10N40:04 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
11.04.1987 JP 87933/87
|
| (71) |
Applicant: IDEMITSU KOSAN COMPANY LIMITED |
|
Tokyo (JP) |
|
| (72) |
Inventor: |
|
- Masashi, Dasai
Ichihara-shi
Chiba-ken (JP)
|
| (74) |
Representative: Türk, Gille, Hrabal, Leifert |
|
Brucknerstrasse 20
40593 Düsseldorf
40593 Düsseldorf (DE) |
|
| |
|
| (54) |
Lubricating oil composition |
(57) A lubricating oil composition comprising: (A) a base oil having a naphthene content
of at least 30%, an aromatic content of not more than 2%, and a kinematic viscosity
at 100°C of 1.5 to 30 cSt; and (B) 0.01 to 5% by weight based on the total weight
of the composition of a friction modifier. This composition is very useful as a lubricating
oil for use in an automatic transmission or a continuously variable transmission,
or as a lubricating oil for use in parts including a wet clutch or a wet brake of
an agricultural tractor, etc.