This investigation was undertaken to compare the amount of oil extracted by hexane, pentane, petroleum ether, and diethyl ether from various oilseeds and flours in an effort to harmonize oil analysis among interested analytical organizations around the world. If one fat solvent were to be agreed upon by the previously mentioned organizations, trade among nations of the world, with respect to oil content of oilseeds, could be enhanced and greatly facilitated. Data provided by this investigation will be used as the basis for uniform selection of a solvent by these analytical organizations.