| abstract |
A two-cycle engine oil composition comprising: n (I) 100 parts by weight of a base oil composed of (A) 20 to 80% by weight of a copolymer of an α-olefin with an ester of a dicarboxylic acid, said copolymer having a kinematic viscosity of 20 to 50 cSt at 100° C., and (B) 80 to 20% by weight of an ester of pentaerythritol with a fatty acid, said ester having a kinematic viscosity of 4 to 20 cSt at 100° C., and n (II) 0.4 to 6 parts by weight of calcium phenate incorporated as an indispensable ingredient in the base oil. |