a method and apparatus to improve the fuel utilization of internal combustion engines by inducing a magnetic field in the fuel before it flows into a carburetor or fuel injector system . aluminum or steel fittings connect a rubber fuel line between a fuel pump and a carburetor or fuel injection system of an internal combustion engine . a magnet assembly having one or more permanent magnets is secured against the fuel line so a preselected pole is in contact with the rubber fuel line . a rubber shield or wrap surrounds the magnet assembly and the portion of the fuel line in contact with the magnet assembly to shield the magnetic field about the fuel line . the one or more magnets direct a magnetic field toward the fuel line to induce a magnetic field into fuel flowing through the fuel line . the magnetic field induced in the flowing fuel is believed to ionize the hydrocarbon fuel to increase combustion efficiency , thus , increasing fuel economy and decreasing fuel emissions .