Watch Dog Economy monitor is a gauge to monitor vehicle temperatures, mass air flow, oil temperature and many other vehicle parameters. This product offers a comprehensive gauge package including all standard vehicle parameters included in 1996 vehicles and newer. It also provides realtime feedback to help users improve their fuel economy by using a patent pending Driving Coach feature designed by our top engineers. The Driving Coach feature shows people specifically where their current losses are coming from so they can make adjustments to correct their inefficiencies. This economy monitor works on all vehicles in North America manufactured from 1996 and newer.