Use Sea Foam Spray To Safely Clean And Lubricate Critical Upper Engine Areas Where Fuel Cleaners CanT Reach. Unlike Tank Additives, Sea Foam Spray Works Through A Gas Engine’S Upper Air Intake To Dissolve Harmful Deposits And Residue Buildup From Intake Runners, Intake Valves, And Combustion Chamber Areas. Help Your Engine Run Cleaner And Last Longer!