| abstract |
(57) [Summary] [Purpose] It has excellent friction characteristics and compatibility with sealing materials, has good thermal stability, and can be used for long drains. Provided is a lubricating oil composition having excellent low temperature fluidity. [Structure] (a) a carboxylic acid having 5 to 14 carbon atoms and (b) The weight ratio with the carboxylic acid having 15 to 38 carbon atoms is 0.1 to 5 An ester of 0: 99.9 to 50 is used as a base oil, on the other hand, an alkyl aromatic sulfonic acid metal salt, a condensation reaction product of an alkanolamine and a carboxylic acid having 5 to 14 carbon atoms, and 5 to 5 carbon atoms. 0.1 or more components selected from a reaction product of a divalent carboxylic acid having 30 alkyl groups or alkenyl groups or its anhydride with an amine is added. ˜15% by weight. |