How to Use Sea Foam in Fuel

Sea Foam Add to Fuel


  • Helps your entire fuel system run smoother & last longer
  • Cleans fuel injectors & carburetor passageways
  • Cleans intake valves & chamber deposits
  • Lubricates upper cylinders
  • Safe for all gasoline & diesel engines


  • For regular fuel system maintenance, add 10mL per liter.
  • For cleaning, use 15mL or more per liter– the more you add to fuel, the better it cleans! Add when the tank is low to maximize cleaning concentration.
  • For injector cleaning machines, use 50/50 mixed with gas.
  • Use 100% Sea Foam for diesel injector cleaning machines or when priming diesel fuel filters.
  • For 2-stroke pre-mix, add 15 mL per liter.
  • When stabilizing fuel for storage, use 10mL per liter of fuel. Sea Foam works to stabilize stored fuel up to 2 years.

Treatment Recommendations

  • For cars and trucks driven regularly: add to fuel every 5,000 kilometers.
  • 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.


For cleaning a gasoline or diesel fuel system, it’s safe to add more Sea Foam to fuel. In fact, the more Sea Foam you add to fuel, the better it cleans!

Pour Sea Foam in your fuel tank to clean and lubricate your entire fuel system. It works through fuel injectors and carburetors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas.

Made from petroleum ingredients, Sea Foam is safe and effective when used in all types of gasoline or diesel fuels and fuel blends. Sea Foam does NOT contain harsh detergent or abrasive chemicals that can harm your engine or fuel system components.

Watch The How 2 Video


Check out the 3 most common uses for Sea Foam Motor Treatment. You might be surprised by how people use it most! Also a quick rundown on how it all started and how Sea Foam works.

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