Octane number is an indicator that characterizes the detonation resistance (explosion resistance) of fuel used in internal combustion engines with external mixture formation (usually gasoline, not used to characterize diesel fuel and aviation kerosene). The octane number is determined on a standard single-cylinder engine with a variable compression ratio. Gasoline with a higher octane number can withstand a higher compression ratio in the engine cylinders without premature self-ignition (engine knocking, “detonation”) and therefore can be used in engines with higher specific power and efficiency [1].