One bottle treats up to 16 gallons of fuel. We poured in 1/2 of the bottle to make this a one-bottle job. On The Top-End. To clean carbon deposits from air intake systems, intake valves and combustion chambers inside the engine, including GDI engines, Sea

Never run Seafoam in a 2-cycle. It dilutes the oil so much that the engine can seize. If the carb needs cleaning, remove the bowl and spray carb cleaner into the jets.

Small engines: add whenever you refuel. For engine equipment used regularly, add Sea Foam to a fresh tank fill every 3 months or sooner. For all other engines and fuel tanks (not used regularly): Add Sea Foam to every tank of fuel. Summary. For cleaning a