Please read the instruction manual carefully before usage. 1) Clean the tank cap on your vehicle thoroughly with silicon remover or spirit so that it is dust and oil free. 2) Gently bend the POWERFUEL tank cap trim to fit the shape of the original cap. 3) Remove the adhesive’s protective film from the cap cover and place the cap in the middle of the tank door. 4) Press accurately on all the cap cover’s surface so that to let the cap perfectly, stick on the tank door. 5) Remove the clear protective film.