Is this sight for real or is it a con ? I myself think, if it is too good to be true it probably is a con!! Save On Your Gasoline Bills

Gasoline is a hydrocarbon. "Hydro" for its hydrogen content.

When the gasoline is burned, where does the hydrogen go? It combines with some of the oxygen to form (gasp) steam (the hot gaseous form of water). In fact, hydrogen by itself is a highly flammable gas (google Hindenburg for an example).

So they want to make gasoline burn better by adding one of its own exhaust products to it? Yea, that sounds real plausible!