Abstract: An auxiliary instantaneous heating and magnetization apparatus for the fuel system of a vehicle comprises an instantaneous heating apparatus and a magnetized combustion-aid apparatus. The instantaneous heating apparatus comprising an electric heating device, an automatic isothermal controller, a temperature fuse, a switch, an indicating light, and an electric source connected in series. The electric heating device is mounted to the fuel pipe at a location near the inlet of a carburetor or a fuel injection system. The magnetized combustion-aid apparatus comprises elongated permanent magnets covered by a housing being substantially C-shaped, in section, and is clamped on the fuel pipe at a location near the inlet of the fuel filter or corresponding to the electric heating device.