LUBRICANT OIL COMPOSITION

The lubricant oil composition according to the present invention comprises a glycol ether carbonate represented by the general formula ¢I! ¢I! wherein R1 and R2 are each independently a member selected from the group consisting of an aliphatic group, an alicyclic group, an aromatic group and an aromaticsubstituted aliphatic group each having not greater than 20 carbon atoms, R3 and R4 are each independently an ethylene group or an isopropylene group, and m and n are each independently an integer of 2 to 100. The lubricant oil composition according to this invention can be widely used for industrial gear oil, automotive engine oil, automotive gear oil, lubricant oil for refrigerators, lubricant oil for fibers and rolling lubricant oil. Furthermore, the lubricant oil composition of the invention can be used for refrigerators using, as a refrigerant, ozone layer-nondestructive Freon such as Freon R-134a. Still furthermore, of the lubricant oil compositions of the invention, there can be used, as refrigerator lubricant oil, a lubricant oil composition containing ozone layernondestructive flon such as Freon R-134a in addition to a glycol ether carbonate represented by the above-described general formula ¢I!.