Fuel Doctor’s FD-47 is The Fuel Efficiency Booster. The FD-47 increases a vehicle’s miles per gallon (MPG) through power conditioning of the vehicle’s electrical systems. Conditioned and clean power allows the vehicle’s electronic control unit (ECU), fuel injection and engine timing equipment to operate more efficiently. When the vehicles engine runs more efficiently it will require less fuel, produce more power and have reduced exhaust emissions (reduced CO2). As a vehicle matures, the power systems tend to generate and experience more electrical noise or electrical interference. This noise can have many detrimental effects on the vehicle’s systems and decrease their efficiency. The FD-47 simply plugs into the lighter socket/power port and the power conditioning qualities of the FD-47 help to reduce and remove this noise and to restore your vehicle’s efficiency. The FD-47 works best on vehicles 24 months and older and CAN NOT be used on Hybrids or Electrical Vehicles.