| abstract |
A two-cycle oil composition comprising: (a) 10-20 % of a first synthetic ester base stock oil (a copolymer of an alpha-olefin with an ester of a dicarboxylic acid, viscosity 20 to 50 cSt at 100 °C); (b) 18-30 % of a second synthetic ester base stock oil (an oxo alcohol ester of a dicarboxylic acid, viscosity 3 to 10 cSt at 100 °C; (c) 30-40 % of a polybutene polymer (Mn 300-1500); (d) 15-25 % of a normally liquid solvent (boiling point up to 300 °C, flash point of 60 °-120 °C); (e) 0.2 to 2.0 % of an oil soluble copper compound, and (f) 0 to 5 % of other lubricating oil additives. |