The Rentar Fuel Catalyst is Government Verified To Reduce Fuel Cost, Reduce Greenhouse Gases, Reduce Particulate Matter, Reduce NOx, Reduce CO2, Reduce CO, Reduce Hydrocarbons, Reduce Volatile Organics, Reduce Diesel Exhaust Pollution, Reduce Black Smoke and Reduce Soot. Pays For Itself in 3 to 12 M...