The StarRotor Engine is a kind of jet engine for your car. By simply replacing conventional engines (15-20% efficiency) with a StarRotor engine, fuel economy will double or triple. For example, a conventional luxury car getting about 25 mpg on the highway would get about 75 mpg. A conventional economy car getting 40 mpg would get about 120 mpg. * It should produce very low pollution. * It has multi-fuel capability. Any liquid or gaseous fuel can be burned, including gasoline, kerosene, jet fuel, diesel, alcohol, methane, hydrogen, and even vegetable oil. * The parts count of the engine is about 10% of a conventional automobile engine, and the majority of parts do not require complex machining.