We are offering here the Electro-Motive Diesel Engine that is a type of internal combustion engine that uses compression ignition to turn energy in diesel fuel to rotary mechanical energy. Diesel engines are up to twice as efficient as gasoline engines around 40 percent efficient, that is. In simple terms, that means you can go much further on the same amount of fuel (or get more miles for the money). The Electro-Motive Diesel Engine is very efficient and made for efficient performance.