| abstract |
(57) [Abstract] [Purpose] An object of the present invention is to provide a lubricating oil which is inexpensive, has little deterioration at high temperatures, and hardly produces tar even when deteriorated, and has excellent volatility resistance. I do. [Structure] (1) Aromatic dicarboxylic acid, (2) 3,5, 5-trimethylhexanol and (3) an aromatic dicarboxylic acid complex ester obtained by esterifying an aliphatic polyhydric alcohol, wherein 1.0 to 1.5 equivalents of an alcohol component per 1 equivalent of an acid component, Ratio of 3,5,5-trimethylhexanol (A) and aliphatic polyhydric alcohol in (A) :( B) = 65: 35-4 It contains one or more aromatic dicarboxylic acid complex esters having a ratio of 0:60. |