A semi-empirical correlation which fits quite well to most of the published data on the solubility of gases in lubricants is presented. Helium, hydrogen, nitrogen, air, and oxygen are well supported. Carbon dioxide is well supported in hydrocarbons but not in esters or silicones. Reactive gases such as HCl, SO2and NH3are excluded, as are hydroxy liquids. Other gases (Ne, CO, Ar, CH4, and Kr) are included by analogy with their solubility in pure fuel hydrocarbons. The overall standard error of estimate was 21 percent. The correlation is based on ASTM D 2779 procedure, modified to include the Hildebrand solubility parameter. Means for estimating the parameter from lubricant density, refractive index or chemical structure are given.Presented at the 34th Annual Meeting in St. Louis, Missouri, April 30-May 3, 1979