Cataclean is an engine and fuel system detoxification technology that prevents fouling of your catalytic converter, removes existing deposits and increases fuel efficiency. Composed of a unique blend of hydrocarbons and known fuel constituents, these components are recognized to be compatible for use in internal combustion engines. Some of the components have been studied and proven to have a positive effect on the efficiency of the fuel combustion process while other components act as pre-combustion solvents to remove the build-up of component contaminants.