Three vegetable oils (sunflower, linseed, and jatropha) were subjected to two successive base-catalyzed transesterifications. First, they were converted into the corresponding fatty acids methyl esters, and then later they were converted into pentaerythryl esters. The physico-chemical characteristics of the esters obtained were evaluated applying the international standard methods. They proved to be promising as synthetic lubricants, and they show very good thermal and oxidation stabilities.