This is a specific fuel designed for the Pre-Run phase of our Nitro Engines. Is recommended during first start on the engine and first tanks. This specific fuel has a 13% extra of oils than Energy competition range of fuels. This improve engine protection (piston-sleeve) during the prerun phase. 1 liter is recommended to use in the begining of the pre-running of the engine, continuing then to finish the pre-run period with the selected competition fuel (both On & Off Road Engines).