Your Ultimate Guide to Sea Foam: What it is and how to use it

Sea Foam is a well-known and reliable treatment for car engines. For more than 70 years, it has been a household name in the automotive industry. Sea Foam helps remove carbon build-up from the car’s fuel system with a secret recipe. It has the ability to re-liquefy tough deposits and sludge, making cleanup a breeze.

Despite its excellent performance, it should not be misused or mishandled. In this article, we will be going over our ultimate guide to sea foam as we tell you what it is and how to use it properly to help your engine run smoothly.

What exactly is Sea Foam?

Gradually, your engine’s interior parts become blocked with all kinds of terrible things. A build-up of varnish and tar on the surfaces of the pistons, rings and lifters, as well as in the oil galleries that deliver oil to every component, can be found inside the crankcase, where the oil resides. Thus, it is less able to keep itself cool and lubricated and therefore has a shorter lifespan and less performance.

There is also a build-up in the fuel system, which can jam the injectors or carburettor jets, clog up intake valves, and atop the pistons. Your engine’s ability to breathe is severely limited if the valves are unable to open and close freely. Detonations are caused by carbon deposits on the pistons and valves, which can lead to hot areas. How to clean the sludge is the problem. The same issue affects nearly every engine type, from small two-stroke lawnmowers to large diesel rigs.

While the company manufactures various excellent products, Sea Foam Motor Treatment is its flagship item. The Sea Foam formula is a well-kept secret for removing carbon deposits from automobile engines and fuel systems. For nearly 70 years, Sea Foam has been a go-to treatment for engines of all kinds.

Fuel systems benefit from Sea Foam’s lubricating properties. Additives containing ethanol dehydrate seals and leave behind a varnish, making it more difficult for oil to lubricate moving parts. The engine’s performance is restored after the varnish is removed. Sea Foam collects water in the fuel tank, making it easier for the combustion chamber to burn it up.

How should Sea Foam be used?

The crankcase, the fuel tank, and the diesel fuel filter are all places where Sea Foam Motor Treatment can be applied. Follow the instructions for using Sea Foam Spray to clean the top end.

  • Crankcase

When Sea Foam is added to the oil, it eliminates sludge, quiets noisy lifters, and removes oil varnish. As one can treat 15 litres of oil, it is sufficient for two treatments for most vehicles. It is recommended to pour half of the bottle into the crankcase before an oil change, then drive 1,000 miles before replacing the engine oil and running the remainder of the bottle into the crankcase. Thus, the first treatment will remove substantial amounts of varnish and sludge, while the second will maintain cleanliness.

This will assist in removing as much dirt and oil as possible from the engine. For each treatment, 8 ounces of seafoam must be poured into the crankcase. One bottle includes 16 ounces, which is sufficient for two treatments. To make filling Sea Foam easier, open the oil filter neck and use a funnel to pour in the substance. Pour up to one ounce of Sea Foam per one quart of existing motor oil.

  • Fuel Tank

Pouring Sea Foam into your gasoline tank to clean the fuel system is an added advantage of this product. Old fuel can cause significant build-up in the fuel system components. Your fuel system comprises numerous components, some of which, such as fuel injectors, have tiny passageways that can quickly become blocked.

If these components get clogged, misfires or significant engine damage may result. When seafoam is poured into the fuel tank, it helps to dissolve the build-up within the fuel system.

Man on a gas station. Guy refuelong a car. Male in a white shirt.

One container can treat 16 gallons of fuel; therefore, depending on the size of your fuel tank, you may only need to use half a bottle. One can cure up to 60,6 litres of gasoline. This will remove deposits from the fuel pump, injectors, or carburettor jets, stabilise the gas, and control the moisture level. Due to its anti-gel qualities, it will serve as a de-icing agent in diesel engines.

When you start the engine, you should see smoke from the exhaust pipe. The smoke coming from your engine is nothing more than carbon residue left over from the combustion of the deposits and grime that have accumulated there.

Ensure to follow the manufacturer’s recommendations when using Sea Foam, one of which is against mixing it with oil or petroleum solvents. It may release toxic fumes and combustion gases into the air.

  • Top-End

Sea Foam suggests utilising Sea Foam Spray Top Engine cleaning and lubricant (Part # SS-14) to remove carbon deposits from air intake systems, intake valves, and combustion chambers within the engine, especially GDI engines. Sea Foam removes carbon deposits from intake valves, the intake system, and the combustion chamber. Sea Foam Spray is the same excellent product as Sea Foam but in aerosol spray form rather than liquid.

The Sea Foam spray can be applied by disconnecting the hose in front of the throttle body, starting the engine, increasing the idle speed to 2,000 RPM, and spraying the Sea Foam into the engine with caution. Please turn off the engine and let it Hot Soak for 15 minutes once spraying is complete. Restart the engine and drive the vehicle until the exhaust is debris-free.

Benefits of Sea Foam

Using the Sea Foam product can result in many advantages, particularly if you’re applying it to a worn-out automobile engine. Here are the primary benefits you can anticipate from utilising Sea Foam.

  1. Better fuel efficiency

If you use seafoam to cleanse the crankcase, the reduced friction may result in greater fuel efficiency. Adding to the fuel may improve the fuel-air mixture, resulting in increased fuel efficiency. Using it in the intake will also produce a more efficient fuel-air combination. All of these usage patterns may improve your fuel economy.

  1. Cleaner and quieter engine

An automotive engine with less muck and accumulation will run smoother, quieter, and be better for the environment.

  1. Emissions are reduced

Due to the generally better air-fuel mixture and lower friction of your internal engine parts, your car’s exhaust emissions are likely lower. This is a fantastic idea for the ecology and future emission tests.

  1. Better performance 

Due to the enhanced air-fuel combination and less friction, the performance of your engine may also be increased, making it simpler and easier to accelerate.

  1. Greater engine durability

Your engine will wear down much more quickly if you have a lot of friction. Lean situations can cause severe engine damage if dirt is found in the fuel system. Your car’s engine will last longer and cost less to repair if you use Sea Foam as a preventative maintenance product.


Cleaning the gasoline or diesel fuel system by adding additional Sea Foam to the fuel is a risk-free technique to get the job done. The amount of Sea Foam that is added to your gasoline determines how effectively it cleans out dirt and sludge. Sea Foam should be used for both cleaning and lubricating the fuel tanks. Through the use of gasoline injectors and carburettors, it cleans potentially hazardous residues and deposits from locations including fuel tubes, intake valves, pistons, and chamber areas.

If you use Sea Foam in your car, you will almost surely notice an improvement in your vehicle’s fuel economy, as well as an increase in both performance and the engine’s level of quietness. Since it is derived from petroleum components, Sea Foam can be used with all varieties of gasoline, diesel, and fuel mixes without causing any problems. As a consequence of this, Sea Foam will not have the same kind of impact on your engine or fuel system that solid detergents and abrasives may.


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