Hybrid Cars With 250 Mpg Fuel Mileage 20 member team at AFS Trinity Power Corp claims to make this possible with their plug in hybrid car. On technology front, they are going to use flywheel to create and store power. Conventional cars use gasoline engine to power the vehicle whereas hybrid cars use gasoline engine with battery support. However, the claimed car will use gasoline engine, battery source with flywheel or a capacitor. The...... Similar Editorial : Hybrid Alternative Fuel by Franknitro. | Source : Alternative Fuel For Cars