this is a fir anion tank for automobile and ship , and its raw materials are plastic and material that generate fir anion under normal temperature , such as tourmaline , germanium ore powder , and other ore powders that generate fir and anion under normal temperature . automobile and ship tanks are tanks of automobiles , motorcycles and ships that consume gasoline or diesel oil as fuel . this kind of fuel tank has the advantages of saving fuel consumption and reducing the emission of exhaust . on the other hand , it is feasible to manufacture fir and anion plastic , rubber or metal patch , sticking them on the outer or inner shell of the gasoline tank ; it is also feasible to paste anticorrosive fir anion coating on the on the outer or inner shell of the tank .