To provide a lubricating oil composition capable of enhancing lubrication performance in a diesel engine equipped with an exhaust gas recycling (EGR) unit.
This lubricating oil composition has a sulfur content of less than about 0.3 mass% and comprises a large quantity of an oil (a) of lubrication viscosity, a small amount of high-molecular weight polymer (b) comprising at least a copolymer (i) which is a copolymer of a hydrogenated polymer of a monovinyl aromatic hydrocarbon and a conjugated diene polymer and the hydrogenated polymer of a monovinyl aromatic hydrocarbon occupies at least about 20 mass% of the copolymer, an olefin copolymer (ii) containing alkyl or aryl amine or amide group, a nitrogen-containing heterocyclic group or an ester bond and/or a derivative (iii) of an acrylate having a dispersing group or an alkylacrylate copolymer, and a phenate detergent (c) which is a neutral and/or an over-based phenate detergent capable of providing to a lubrication oil composition at a ratio of about 6-about 50 mmol phenate surfactant per 1 kg of the final oil, and this lubricating oil composition contains in the lubrication oil composition a salicylate surfactant less than 1 mmol per 1 kg of the final oil.
| JP2005132960 | ENGINE OIL COMPOSITION |
| JP2014132097 | LUBRICATING COMPOSITION |
| JP2003500520 | [Title of Invention] High-stress electrical insulating oil |
BANSAL JAI G
EMERT JACOB
FETTERMAN GLEN P
GUTIERREZ ANTONIO
IRVING MATTHEW D
LOCKE CHRISTOPHER J
MINOTTI MICHAEL T
| JP2004099900A | 2004-04-02 | |||
| JP2004107645A | 2004-04-08 | |||
| JPH09111275A | 1997-04-28 | |||
| JP2001107074A | 2001-04-17 |
Fumiaki Otsuka
Sadao Kumakura
Nobuo Ogawa
Takaki Nishijima
Atsushi Hakoda