Has any one looked into Hydrogen add on for there jeep for better fuel mileage? I read on the internet about how great it is. Is it a scam or is it for real?  

It's a scam. It puts a lot of drain on the alternator and only creates a small amount of hydrogen. Look at it like this. The auto manufacturers spend millions of dollars to get the best fuel economy they can from a given vehicle. This includes wind tunnel tests, tire compound changes, ride height changes, and of course anything they can do to the engine. Seems silly to think some guy on the internet has the fuel crisis solution with some product that costs a couple hundred bucks.

And if that don't do it for ya, my brother works in the alternative fuel (hydrogen, hybrid, electric, diesel,..)automotive industtry. I asked him. He says it's crap.  

Here something on the internet that will test your "is it true" wits...

Click on popcorn for a little fun.

POPCORN  

Thank you very much. That is what I thought but I don't know about things like that. I guess I was just hoping.  

http://www.eatonlab.net/

http://www.wranglerforum.com/f19/my-dads-hybrid-wrangler-s-19005.html

that'll keep ya busy for a while....

the wrangler forum has a bunch of links of videos that explain a few things if ya can get past all the bull in the thread.

it's definately not a solution to fuel problems though as a suplemental fuel it's feasable if ya wanna mess with it, in order to run solely on h20 on demand production is still a wet dream. though there are hydrogen powered vehicles running around with stored  h2o as the sole fuel source.

the scam involved here is waterforgas.com's idea of passing along info and some of the bull crap gets deep..