The web site…

 http://water4gas.com/2books.htm

  …speaks of 1,833 gallons of hydrogen and oxygen production from one gallon of water in their electrolysis device.  They go on to suggest this will last for months of driving.

The typical sub-compact automobile consumes over 300 gallons of air per minute at typical power generating RPMs (data converted from http://ptaff.ca/air/?lang=en_CA#table3).

If the Water 4 Gas device is turning energy into hydrogen and oxygen at such a slow rate compared to the large volumes of gas flow through the engine, how are we to believe it makes any difference at all.

I await an independent test to verify if the Water 4 Gas device provides measurable efficiency gain.  Hearsay just won’t cut it as too many people remain confused over the physics.

References:

• http://ptaff.ca/air/?lang=en_CA#table3
• http://www.engineeringtoolbox.com/flow-units-converter-d_405.html