A diesel fuel classification is proposed that is compatible with fuel availability and that would enable consumers to better choose the optimum fuel for any use. It includes four, well-defined grades of fuel: I - A volatile, very high quality fuel with excellent combustion characteristics especially suited for use at low temperatures. II - A high quality fuel for general use in vehicles. III - A good quality fuel for general use in vehicles. IV - A fuel for nonvehicle use.Industry-wide adoption of this classification is recommended, and a proper first step would be revision of the ASTM D 975 classification of diesel fuel.