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1. (WO2015114920) LUBRICATING OIL COMPOSITION

Pub. No.:    WO/2015/114920    International Application No.:    PCT/JP2014/080756
Publication Date: Fri Aug 07 01:59:59 CEST 2015 International Filing Date: Fri Nov 21 00:59:59 CET 2014
IPC: C10M 141/12
C10M 137/00
C10M 139/00
C10N 10/04
C10N 10/12
C10N 20/02
C10N 30/00
C10N 30/04
C10N 30/12
C10N 40/25
Applicants: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
エクソンモービル リサーチ アンド エンジニアリング カンパニー
TOYOTA JIDOSHA KABUSHIKI KAISHA
トヨタ自動車株式会社
Inventors: ONODERA Ko
小野寺 康
NEMOTO Shuzo
根本 周蔵
KATO Tomohiro
加藤 智浩
FUJIMOTO Kosuke
藤本 公介
YAMASHITA Minoru
山下 実
Title: LUBRICATING OIL COMPOSITION
Abstract:
[Problem] To provide a lubricating oil composition which can reduce the occurrence frequency of LSPI and which can ensure detergency. [Solution] The present invention is a lubricating oil composition which comprises a lubricant base oil, a compound having calcium and/or magnesium, a compound having molybdenum and/or phosphorus, and an ashless dispersant having nitrogen and which satisfies X ≤ -0.85 and Y ≥ 0.18 (wherein X is calculated according to formula (1): X=([Ca]+0.5[Mg])×8-[Mo] ×8-[P] ×30 and Y is calculated according to formula (2): Y=[Ca]+1.65[Mg]+[N]). The present invention is particularly a lubricating oil composition for use in an internal combustion engine, more particularly, a lubricating oil composition for use in a supercharged gasoline engine.