VP Racing Octanium Unleaded AdditiveOctanium Unleaded gives an octane boost up to 7 numbers (70 points). It enhances engine performance by increasing horsepower. It also has the added benefit, of eliminating knocking and pinging, cleaning fuel injectors, and reduces gum and varnish build up. Octanium Unleaded will also improve throttle response and acceleration. One 32 ounce bottle treats up to 38 litres.