Title:
INTERNAL-COMBUSTION ENGINE OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/1996/028526
Kind Code:
A1
Abstract:
An internal-combustion engine oil composition prepared by adding (a) a boron-containing ashless dispersant, (b) a metallic detergent and, if necessary, (c) at least one member selected from among esters of hydroxylated aromatic carboxylic acids with hydroxy compounds and boron-containing derivatives of the esters to a lube base oil at a [B]/[M] ratio of 0.15 or above {wherein B is the boron content (wt.%) of the composition, and M is the total content (wt.%) of the metals resulting from the metallic detergent in the compostion} and having a sulfated ash content of 1.5 wt.% or below. This composition has a lowered ash content, does not impair the performance of an exhaust posttreatment apparatus and is excellent in coking resistance and oxidation stability.
Inventors:
GOTO MASAHISA (JP)
MIYAJI TOMOMI (JP)
MIYAJI TOMOMI (JP)
Application Number:
PCT/JP1996/000620
Publication Date:
September 19, 1996
Filing Date:
March 13, 1996
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
GOTO MASAHISA (JP)
MIYAJI TOMOMI (JP)
GOTO MASAHISA (JP)
MIYAJI TOMOMI (JP)
International Classes:
C10M163/00; C10M167/00; C10M141/12; C10N30/04; C10N30/10; C10N40/25; (IPC1-7): C10M139/00; C10M159/20; C10M105/40; C10N40/25
Foreign References:
| JPH06184578A | 1994-07-05 |
Other References:
See also references of EP 0816477A4
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