We can provide various Super Fuel Saver for improving the combustion fluid fuel in combustion devices, such as, general burners, incinerators, fuel oil boilers from appliance boilers to heat power boilers (home or industrial heating), various combustion furnaces, and internal combustion engines in automobiles (two-cycle and four-cycle, diesel and gasoline), trucks, ships and jets, where the fuel employed is liquid or gaseous hydrofuels, such as oil, gas, natural gas, propane, kerosene, gasoline, fuel oil, butane, etc... Applying a magnetic field to ionizing fuel to be fed to combustion devices we can ensure more complete combustion, obtaining a maximization of the fuel economy, improving the fuel efficiency and reducing polluting emissions. The magnetic field strength must be at a higher Gauss level (3000--10000Gauss) 。