Race Gas Ultra Fuel Concentrate is specifically designed for the requirements of very high compression, boosted or nitrous engines. When mixed with 99 Octane pump fuel, it will create racing fuel with octane up to 120 Octane . It increases the octane, chemical oxygen and chemical energy of the fuel to equal commercially distilled racing fuel. Want to try RACE-GAS ULTRA ? Start with a single can. Make high energy, high octane racing fuel when and where you need it. Makes up to 120 Octane from 99 Octane Pump Fuel.