Fueling a Nitro RC

RC glow engines use nitro fuel, a methanol-based fuel with nitromethane and oil added. The amount of nitromethane in the fuel is typically about 20% but could be anywhere in the 10% to 40% range or higher. Castor oil or synthetic oil is added to the fuel to provide lubrication and cooling. The type and amount of oil in the nitro fuel is what determines whether it is better suited to RC cars and trucks or aircraft.