PURPOSE: The titled lubricant composition having especially improved water release properties, obtained by blending a specific amount of a specific base oil with a specific amount of a metallic cleaner, a specific amount of an ash-free dispersant, a specific amount of a zinc dialkyldithiophosphate, etc. and a specific amount of a specific oxygen-containing compound as essential components.
CONSTITUTION: A base oil consisting of a mineral oil and/or a synthetic oil is blended with (A) 0.1W80.0wt% metallic cleaner, (B) 0.1W15.0wt% ash-free dispersant, (C) 0.1W5.0wt% zinc dialkyldithiophosphate and/or zinc diaryldithiophosphate, and (D) 0.005W1.5wt% one or more of polyoxyethylene glycol monoalkyl(aryl) ether, polyoxyethylene-polyoxypropylene block copolymer, adduct of polyoxyalkylene with alkylene diamine, and (polyoxyethylene)sorbitan alkyl ester as essential components, to give the aimed lubricant composition.
ISOBE NOBORU
MITSUFUJI KIYOUJI
