Klotz® HiTRATE® Racing Gasoline Concentrate is designed for use in all racing engine applications. Klotz® racing technology converts hi-test pump gasoline into High Octane Racing Gasoline. High octane racing gasoline allows the use of higher compression ratios and advanced timing, which builds more horsepower. Mix at a ratio of 9:1 with 93 Octane Pump Gasoline to make 103-105 High Octane Racing Gasoline (final octane rating will depend on the quality of your pump gas)Not alcohol compatible.