Save fuel, gas mileage and money by using the kraftstoff energiesparer Fuel Savings Patch on you vehicle's fuel tank! The patches were designed with a new 9-layer nanotechnology using FIR rays and scaler energy to trigger a series of molecular changes in the fuel. Therefore, the fuel runs cleaner and more efficiently! One or more patches are needed depending on the size of the gas tank. The patch can be used for a small economy car, luxury car, SUV or a big diesel semi- truck.