The synthesis of a series of triesters based on 1,3,5-adamantanetriol and 7-ethyl-1,3,5-adamantanetriol and C-4-C-6 aliphatic acids is executed, and their physicochemical and thermo-oxidative properties are studied. The properties of the obtained esters are compared to those of pentaerythritol esters. The synthesized esters have pour points below -40 degrees C, the range of viscosities at 100 degrees C varies from 4.361 to 9.912 mm(2)/s, and the values of the indices of thermo-oxidative stability are 221.6-240.3 degrees C.