Conventional wisdom says when something seems too good to be true, chances are it is.
Paul Waters knows that all too well. The former chemistry professor has tested a gasoline additive he says can produce a 10 percent increase in horsepower, a 20 percent increase in mileage, and a 70 percent decrease in harmful emissions. Yet, he understands why his claims may seem far-fetched to some. That's the response we've gotten from almost everybody. D.C. The additive is polyisobutylene, a polymer that makes the hydrocarbons in gasoline burn much more uniformly, thus increasing efficiency, says Waters, scientific advisor to General Technology Applications, the company that developed the additive.