The composition is used for fast start-up of gasoline (carbureted, fuel-injected) and diesel engines. It makes the engine start easier in winter and extends the service life of batteries. It comprises the synthetic metal conditioner SMT2 which significantly improves lubricating properties, excludes starting wear and micro-tear in the cylinder-and-piston group. It comprises flaming activators and stabilizers, ensuring even mixture combustion and smooth pressure increase. It can be used for engines with pre-combustion-chamber ignition. It exceeds all existing similar products by efficiency!