You'd be rich?

I just looked it up and then googled a bit.

http://www.auto-facts.org/water4gas-scam.html

http://answers.yahoo.com/question/index?qid=20071201094117AAfXSe8

http://mythbustersresults.com/episode53

http://www.water4gasripoff.com/

It seems feasable and I did read up on one guy who has a similar system
installed in his boat....

...only the system he has cost several thousand dollars and was custom built
to run with deionized water.  It has more to do with the power output of
the diesel engines than the actual mileage.  Similar to rice racers and
diesel sled pullers adding NOx to their systems to gain a bit of HP.

I then fired up the old trusty piratebay and KTorrent to see what I could
find. A minute later, I had the water4gas ebook.

As soon as I get my degree in electrical engineering, I'll buy a used car
and see what it does.*

It seems the site tells you how to download said ebook for $$ and then hire
a mechanic to put this system in.

*Not planning on going to school anytime soon.