Concentrated, metal-free octane booster designed to increase power by increasing octane number and combustion efficiency. The advanced formulation eliminates knocking by increasing the auto-ignition temperature of the air/fuel mixture and readily mixes with all fuels, including nitro and alcohol mixtures. The all organic blend contains no metal or phosphorus compounds and effectively increases power at dosages as low as 1 oz. HI-TEST per gallon of fuel.