I look at it like this.....if they did all they claimed to do....why doesn't the Ford, Chevy, etc, instal them at the factory so they can meet CAFE (I think is the govt accromyn that deals with fuel mileage requirements)?
Plus, they try to sell for for the Ford turbo Power Stroke direct injection diesel. A diesel such as this is different than a gas burner. The turbo swirls the air already and the diesel fuel is injected directly into the cylinder head, not the ports. So, how can it help atomize the fuel in my truck? My bets are none, nadda, nothing, zip. Same as they would for a non-carb'd car.
A motor with a carb, might help, but I serious doubt if much as they claim.
I've got some swamp land for sale cheap....