The compressed air motor car is, therefore an inexpensive vehicle of simple maintenance and a low cost, thanks mainly to the moderate temperature at which the motor works: oil change every 50.000 km using vegetable oil (avoiding recycling). A reliable vehicle, safe (no inflammable substances, no risk of explosion) and a 100% ecologic vehicle which uses only the air we breathe to run. Better yet, it "filters" the already polluted air it absorbs and delivers it back cleaner than when it entered. The vehicle thus, does not pollute, but rids of pollution.