Title: Lubricating oil composition for internal combustion engine
Application Number: 02818374 Application Date: 2002.09.06
Publication Number: 1556846 Publication Date: 2004.12.22
Approval Pub. Date: 2007.06.20 Granted Pub. Date: 2007.06.20
International Classifi-cation: C10M163/00;C10M133/16;C10M133/56;C10M137/02;C10M137/10;C10M159/20;C10N10/04;C10N30/04;C10N30/06;C10N
Applicant(s) Name: Nippon Oil Corp. Address:
Inventor(s) Name: Kurihara Isao;Yamada Yasuhisa;Shirahama Shinichi
Attorney & Agent: sun ai
Abstract:
    Lubricating oil compositions for internal combustion engines comprises a mineral and/or synthetic base oil, (A) a succinimide-based ashless dispersant in an amount of 0.08 to 0.40 percent by mass in terms of nitrogen, (B) a metallic detergent in an amount of 0.06 to 0.22 percent by mass in terms of metal element, (C) a zinc secondary alkyldithiophosphate in an amount of 0.04 to 0.08 percent by mass in terms of phosphorus, and (D) a phosphorus-containing ashless anti-wear agent in an amount of 0.01 to 0.04 percent by mass in terms of phosphorus and contains sulfated ashes derived from the metal elements in the composition in an amount of 0.3 to 1.0 percent by mass. The lubricating oil compositions are excellent in anti-wear properties and high-temperature detergency although they are decreased in ash content.
Time: 6
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