The Greentech Fuel Saving Device applies world leading ‘Molecule Enhancing Technology’ to your vehicle. The breakthrough technology has been tested for over 3 years on more than thousands of vehicles and carries numerous reports by TUV Rhineland Group, SGS, and California CEE, an EPA & CARB certified lab in the United States. Greentech Fuel Saving Devices can be fitted into all kinds of the vehicle with no need to modify the vehicle and will not affect the vehicle warranty.