Prolong Super Lubricants PSL16030 Fast Fuel Octane Power Boost - 12 oz. Offers a Street-Legal Jolt of Extra Octane Power Features a Formula that Can Restore Lost Horsepower and Eliminate Knocking, Pinging, and Hesitation Offers to Eliminate the Expense of Octane Enhanced Fuel Features Added Performance when Pulling a Trailer or Boat Includes a Formula Engineered to Not Harm Oxygen Sensors or Catalytic Converters