Representative turbine oils and turbine oil components were exposed to electron radiation and evaluated for radiation-induced changes in functional characteristics. The irradiated oils were examined by numerous laboratory techniques including those established by the ASTM Committee C on Turbine Oils. As a result of exposure to radiation, changes were noted in turbine oil viscosity, oxidation stability, rust resistance, foaming susceptibility, color and other properties.Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angeles, Calif., October, 1958.