Most of those are definitely scammish. Is your H2 M/T or auto? I'm assuming you have the 6L V8... Assuming this isn't a troll, you're probably going to have to go after aggressive gearing/rolling resistance/aerodynamic mods to reach the 20mpg range, but I'm sure you can approach 13-15mpg by limiting the amount of city driving you do and only going ~55-60mph with the cruise control on during highway stints.
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
I agree with SVOboy. Most of the gadgets are just gadgets...
think of it like this.
You paid what, $30k for your H2? If it only cost the Hummer people an extra $50 for some magnets, a tornado, or a fuel vaporizor to turn your 10MPG vehicle into a 20MPG vehicle, why wouldn't they install it themselves?
Imagine the advertising potential for a 20MPG Hummer.
That alone should make anyone realize that the gadgets, while interesting (That you should investigate---I'm sure they're advertised on this site), probably won't work.
start a gaslog and try to get some good % over epa maybe that will kill some of the hostility. does your wife have a car that gets better mileage? if so just try to drive that more to of set the insane amount of gas used by the H2