Hydrogen or H2O systems may be a waste. On 10/4/2008 I had a Mileage Monster Single Cell HHO System installed for a total cost of $679.95 including the $250 installation charge. My first fillup today showed a MPG of 23.8 MPG, down from my average for this vehicle of 26.3 MPG. We will see what the future holds. To date it looks like I may have wasted $679.95. If you simply must try it for yourself check it out at www.iuseH2O.com.
1Jal1 
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