Built this HHO generator for my old work truck. Improved my gas milage by 30%. Got it from 14mpg, up to 21 mpg. Made it from parts from the hardwear store. Cost me around $50.

<iframe width="640" height="360" src=" frameborder="0" allowfullscreen></iframe>  The water fuel cell is a technical design of a "perpetual motion machine" created by American Stanley