nobleman,
Yep, the oil companies will probably need masive quantities of imported oil to make the water.
Caymen,
Perhaps the owners of companies that make the devices like the Tornado would be arrested if they were living in Texas and had enough customer file complaints?? The real problem is that most of the theory behind the Tornado is solid and they do work on some vehicles. On vehicles with carburators and throttlebody injection, the intake system transports a mixture of air and fuel. When the air is swirling it will keep the gas vapors in suspension while navigating around and through the intake passages. This can lead to a more even and consistant air/fuel ratio. This can increase HP and improve gas mileage on some vehicles.
On port injected engines, the benefits are small if non-existent. If the design of the intake restricts airflow to some of the cylinders, it is possible that the swirling air will even out the amount of air entering each cylinder. However, the modern enigne would not have that poorly designed intake, but a build up of carbon in the intake can restrict air flow and cause uneven air distribution. Engines in need of a good decarboning might also see a slight improvement in HP and MPG, but not like to exceed the increases that just cleaning the engine would do.
The fact that the Tornado like devices do not work on all engines, but do work a some would not qualify it as a total fraud and that the sellers could know which vehicles might notice some benefit, while others don't.
...Rich