Character of HKS Drag Gas ------------------------------- (Purely Use for Engine Running) 1- Higher Octane : its octane number is 110. 2- Higher Energy and Specific Heating Value. 3- Assist tuner for easier tune the engine at higher Horse Power. 4- Higher compression ratio is applicable. 5- 100% Unlead Gasoline (Other Racing Gas is composed of Lead). 6- Able to use with Catalytic Converter (Other Racing Gas is composed of Lead)cause damage to Catalytic Converter). 7- Exhaust Smell is lighter and Smoke is lower (Other Racing Gashave strong smell and black smoke). 8- Suitable Air Fuel (A/F) Ration for Highest Torque is different. Normally tuner set A/F at 11:1 but HKS Drag Gas can set A/F at 12~12.5:1 for Highest Torque. The reasons is Drag Gas can give the Higher Complete Combustion at the same fuel flow rate and pressure feeding to engine. 9- Better Resistant for Knocking, High Compression Ration, High Boost, and High Advance Ignition Setting. Caution : - Spark Plug Heat range should be increased . - Engine running temperature and exhaust temperature will be increased.