Abstract
We investigated difference of lubricity of triolein, tristearin and rapeseed oil as a reference under high temperature conditions for acceleration of oxidation degradation. Though the triolein consisting of the monounsaturated fatty acid showed superior oxidation durability and oiliness to the rapeseed oil including the polyunsaturated fatty acid, phenomena which might be caused by corrosion and elimination of adsorbed film were observed on both lubricants. On the other hand, there was a possibility that the tristearin consisting of the saturated fatty acid has a superior forming capability of adsorbed film and not be related to corrosion.
