Radio-controlled offroad are self-powered model cars that can be controlled from a distance using a radio-frequency transmitter. Small cars could be powered by powerful electric motors and rechargeable cells. But more powerfull are fuel-powered models which use glow plug engines, small internal combustion engines fueled by a special mixture of nitromethane, methanol, and oil. Large models are powered by small gasoline engines, which use a mix of oil and gasoline. Offroad RC model is fun and hobby for kids of all ages and their parents.