... type... Fuel Saver for Cars,Introduction of fuel saver for carsAuto Fuel Saver is a model high-tech product. The principle ... additional gas, add oxygen to burn, Through a set of special valves, put the fission of molecular oxygen gas into the combustion chamber ... When completed, according to debug method, adjust plusminus screw of the fuel saver to the optimum position. Carburetor Series’ installation ...