Lubricating oil composition for use in two-stroke cycle cylinder injection engine

摘要

A lubricating oil composition for two-stroke cycle cylinder injection engines contains as essential ingredients: (A): a base oil containing (1) 10 - 30% by mass of polybutene with number-average molecular weight 250 - 350 on the basis of a total amount of the base oil, (2) 30 - 60% by mass of polybutene with number-average molecular weight 450 - 550 on the basis of the total amount of the base oil, and (3) 15 - 40 % by mass of mineral oil and/or a synthetic oil, which is other than polybutene, with kinematic viscosity 2 - 35 mm<2>/s at 100 DEG C, on the basis of the total amount of the base oil; and (B): 2 - 15 parts by mass of alkylaminophenol having an alkyl group with 8 - 400 carbon atoms relative to 100 parts by mass of the base oil. <IMAGE>