Today I currently get:  Miles per Gallon (MPG)        if HYOX Improvement %:  % Percent Gas Mileage Increase
Today's Gas Price is:  $$.$$ Cost per Gallon        The device build cost is:  $.$ Parts cost - Do It Yourself
With Device I expect:  Miles per Gallon (MPG)

Your Eco (Carbon Dioxide) Footprint - More Information - Alternatives

HyOx Direct Links .....
Hydrogen / Oxygen Information Links - HyOx 
HyOx Frequently Asked Questions (FAQ)
Basic Parts List - HyOx