This is a proposal to reduce air drag which is the primary reason for cars’ poor gas mileage.  Even though cars are streamlined, the frontal area (height x width, ≈ 20 sq. ft.), pushes the air and uses more fuel to overcome.  The proposal is to draw air in at the front, and to expel it out the back to reduce the air drag to zero.

     The air is pulled in around the hood, fenders, and windshield.  Fans force air through ducts under the floor, and above the headliner to the rear where it is pushed out the back, neutralizing the drag.