Gas saving device and method for dissociating water

The method consists of replacing the exhaust pipe directly below the exhaust manifold of an engine with an expanded exhaust pipe that encases the water dissociation device, consisting of a long, spirally formed super heater, preferably stainless steel tubing to have vast area of contact to maximize heat transfer to the passing water. The spirally formed tubing causes the passing water to turbulently move in circular manner, superheat, exert great pressure on the inner wall of the superheater tubing, discharges and expands in the large dissociation chamber into its constituents hydrogen and oxygen gases that are immediately sucked into the combustion chamber of the engine to cause efficient combustion of the fuel, reduce emission, add power and speed, increase mileage and release oxygen.