Car engine efficiency on better mileage will be based on the following factors: air filter medium, engine condition and fuel quality. As the engine RPM increase, air inflow decrease. Having a electrolysis system, producing hydrogen and oxygen via alternator and booster box. Hydrogen and oxygen gas can be store for situational use. With the aid of a computer control valve, the hydro-oxygen gas will be injected in to the air filter inlet. The release valve will be switch ON as the vehicle reaches 30khp and above. Hydrogen and Oxygen feed will increase engine power, better combustion of fuel and environmental care.