Motorkote MK-10203-06-6PK Upper Cylinder Lubricant, 64-Ounce, 6-Pack Directions: Add full 5 ounce to 25 gallon Fuel Tank every fill-up, maintain the ratio of 1 ounce per 5 gallon of fuel Compatible in both fuel and diesel engines and more concentrated fuel cleaning capability then the brand leader Motorkote upper cylinder lubricant is safe for use in all catalytic converters, carburetors, and fuel injection systems and will not void warranties Can be used with Motorkote fuel optimizer or Motorkote low sulfur lube in diesel engines, alternate products between fill-ups Cleans injectors to reduce: Power loss, hesitations, pinging/dieseling, loss of fuel economy