Exhaust emissions are the result of incomplete combustion as shown in the Mechanical Handbook by Baumeister, where the stoichiometric chart shows the relationship between emissions and unburned fuel. As more of the fuel is combusted, the emissions go down and efficiency goes up, hence the fuel savings.
When a properly focused magnetic field is applied to a hydrogen-based fuel, the hydrogen is converted from the para- (less volatile) to ortho- (more volatile) state. This potentiates fuel so that the hydrogen attracts and bonds with more of the oxygen (getting the oxygen to bond with the hydrogen is necessary for complete combustion, hence with each MAGNETIZER® Engine Energizer System we use the blue color MAGNETIZER® Air Energizer units with N (negative, North Pole) polarity to make oxygen bond better with the positive, S (South Pole) charge treated fuel). When this happens, we burn more of the fuel and that reduces exhaust emissions and increases the fuels efficiency (better fuel economy and power).