Eco Fuel Saver ChipFuel saving tips that big oil companies don't want us to know about. This Ecofuel device works on Gasoline "Petrol Unleaded" and Diesel engines and helps save on average 20% more fuel. It works by accessing the OBD protocols and remapping your car's ECU for better fuel consumption. The Eco Fuel Saver Chip adjusts itself to the car, according to the drivers' habit and always keeps remapping the ECU to save fuel and lowering emission. FEATURES 20% FUEL