Prolong Super Lubricants PSL16040 Fast Fuel Injector Cleaner - 12 oz. Features a Formulation that Thoroughly Cleans Injector Tips Offers to Remove Carbon Deposits that can Cause Misfiring and Poor Fuel Economy Features a Formulation that is Compatible with ALL Gasoline Grades Offers to Scour Clean Intake Valves Includes the Ability to Restore Uninhibited Spray Pattern for Optimum Firing Rate with Periodic Treatments