OB1 Race Fuel Additive is a high performance fuel additive specially formulated to increase the octane of the base fuel, boosting Power and Torque and promoting cleaner burning and smoother running.OB1 Race Fuel Additive allows you to take advantage of more aggressive tuning, allowing more ignition advance, higher compression and higher boost on turbocharged engines. By simply adding OB1 to 95 octane unleaded allows you to effectively run ‘race fuel’ on demand.