Composite ester polyamide composition, lubricant composition, and method for producing lubricant and composite ester polyamide composition

The purpose of the invention is to provide a lubricant capable of exhibiting excellent lubricant performance and a lubricant having excellent hydrolysis resistance. The invention pertains to a composite ester polyamide composition containing an ester polyamide obtained by condensing a polyamine containing at least two primary or secondary amino groups, a polycarboxylic acid including at least two carboxyl groups, and a monohydric alcohol having four or more carbons. The invention also relates to a lubricant composition containing a composite polyester composition and a method for producing a lubricant and composite ester polyamide composition.