Sea Foam Motor Treatment works to dissolve and clean fuel deposits and sticky residues from gas and diesel fuel injectors, carburetors, and combustion chambers. Sea Foam helps to stabilize stored fuel for up to two years by resisting evaporation, preserving ignition vapors, and preventing the formation of gum and varnish. Sea Foam lubricates upper cylinders and helps to protect the entire fuel system from dry out, wear and corrosion. Sea Foam only contains petroleum-based ingredients. It does NOT have harsh detergent or abrasive chemicals that can harm your engine. The more you add to fuel, the better it cleans.