Xcelplus is a distibuter of the Flextek system. (Flextek has been around for years in Brazil as a conversion so most any car can burn E85 fuel.) So they make $ from the sales but they are also making money from the sales of the E85 engine treatment that comes along with the Flextek package. Soon they will add the E85 motor oil to their products as Xcelplus is poised to have the first "E85" motor oil on the market.