Abstract: An internal combustion engine, synthesizing CO and H.sub.2 fuels from methanol in a first synthesizer, and also synthesizing H.sub.2 fuel from CO and water in a second synthesizer, thus upgrading a technically difficult to use fuel to a low polluting, easily usable fuel, by use of the energy from exhaust gas waste heat thus improving the fuel heating value by 20%; the engine fuel system also having an alternate energy source for synthesizing the fuel, the engine also having an additional alternate fuel source for engine starting and operation when the synthesized fuel reservoir is low and electrical battery energy is limited thus allowing time for the heat exchanger synthesizers to warm up to produce CO and H.sub.2 fuel, which is especially required during cold operating seasons.