With a 15% increase in fuel efficiency that is a 15% increase in power. NASCAR racers should buy as many of these devices as they can get. If you run 100% methanol like INDY cars, you get about 18% increase in power over gasoline.
Mercedes, BMW, GM, Ford should buy up GWBU and dominate the auto industry. It works on everything too. Cars, lawnmowers, rototillers, trains, trucks, tractors, weed-eaters, and maybe UFOS.
It sure worked on many investors too.