LUBRICATING OIL COMPOSITION IMPROVED IN OXIDATION, VISCOSITY INCREASE, OIL CONSUMPTION AND CONTROL OF PISTON DEPOSIT

摘要

PROBLEM TO BE SOLVED: To provide an engine oil lubricant composition in which oxidation, viscosity and the control of piston deposit is improved. SOLUTION: The engine oil lubricant composition is capable of controlling the viscosity increase and improving cleanliness of the piston, and the lubricant composition comprises mainly a synergetic effect type base oil mixture comprising at least one of a base oil of group III, at least one of a base oil of group IV and at least one of a base oil of group V. COPYRIGHT: (C)2009,JPO&INPIT