Sea foam: What is it, and how to use it

A well-known and reliable remedy for vehicle engines is sea foam. It is a well-known brand that has been in use for more than 70 years. This fuel additive’s exclusive formula aids in removing carbon buildup from the fuel system of the vehicle. In order to make difficult deposits and sludge simpler to remove, it might re-liquefy them.

A multitude of automobile uses exist for seafoam. It can be used to clear clogs from the oil system, fuel injectors, and engine. However, be careful not to add too much because doing so can have the opposite effect of what you intended. Thus, in this article, we’ll be discussing the followings;

  • What is sea foam? Benefits and drawbacks.
  • How to use seafoam.

sea foam


So, let’s dive in!


What is sea foam?

An additive called sea foam is used to clean cars’ engines and fuel. It can be used to clean the intake valves, carburetor tubes, and other crucial parts. It is intended to get rid of carbon deposits that accumulate over time. Engines powered by gas and diesel may both use sea foam. However, not everything on the road is compatible with it.

The majority of the ingredients in Sea Foam are petroleum-based. Pale oil (40–60%), naphtha (25–35%), and isopropyl alcohol (10–20%) are a few of the main constituents.


  • Cheap
  • Stabilizes Fuel
  • Clean Engines
  • Saves Money on Repairs


The cost of automobile ownership and maintenance is high. You are always going to be looking at some additional costs on top of what you are already spending to fill the tank with petrol and maintain the vehicle when parts are required or equipment needs to be added.

You might spend as little as $20, depending on where you buy your Sea Foam container. This product is an excellent deal for the advantages it provides because it’s difficult to get anything for your vehicle for such a low cost.

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Stabilizes Fuel

Additionally, the fuel system can be stabilized by using sea foam. When you store your car, the stabilizer helps to lessen evaporation and can eventually become more effective.

Utilizing the additive to stabilize fuel for up to two years is advised by the manufacturer. But not everyone believes it will remain effective for this long. The addition may be advantageous for even short-term storage.

Clean Engines

The oil and engine can benefit greatly from the usage of the Sea Foam addition. Its purpose is to get rid of residue and deposits that have built up in the engine over many kilometers of use. This material may obstruct natural oil flow, causing the engine to run poorly.

Additionally, Sea Foam can enhance lubrication and stop corrosion. Customers who are worried about the seals’ degeneration also utilize it to ensure a longer life.

Saves Money on Repairs

If something in your car starts to malfunction, you might have to pay for a costly repair. However, there’s always a chance that a straightforward Sea Foam bottle could solve the problem or extend the period of time you can go without fixing it.

For instance, before replacing your car’s unclean fuel injectors, you might try a can of Sea Foam. Financially speaking, it makes sense to try the additive first because even having the fuel injectors cleaned can cost $200 or more.

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  • Thins Oil
  • Decreased Fuel Economy
  • Possible Damage to O2 Sensor
  • Not Compatible with All Engines

Thins Oil

You should avoid using sea foam in an automobile engine that has direct injectors. The dirt, debris, and sludge will be loosened by the addition and wind up in the injectors, where they could clog. Sadly, you might have to pay hundreds or even thousands of dollars for repairs if this happens. If your engine is a diesel direct injection, the price is even higher.

It’s crucial to stick to the suggested amount of Sea Foam for this reason. You don’t want to add too much and compromise the motor oil’s ability to lubricate and protect.

Decreased Fuel Economy

To clean the system, some individuals favor using Sea Foam in the gasoline tank. You can experience a drop in gas mileage if you do this. Of course, neither this decline nor this gain will be significant or long-lasting. Nobody likes to spend more money on petrol than is necessary, though.

Possible Damage to O2 Sensor

A healthy oxygen sensor is unlikely to be harmed by sea foam. However, the additive can quicken the process if the O2 sensor is already close to failing. The engine runs harsher once the oxygen sensor malfunctions. Additionally, fuel efficiency declines, and the vehicle may fail an emissions test.

Not Compatible with All Engines

You should avoid using sea foam in an automobile engine that has direct injectors. The dirt, debris, and sludge will be loosened by the addition and wind up in the injectors, where they could clog. Sadly, you might have to pay hundreds or even thousands of dollars for repairs if this happens. If your engine is a diesel direct injection, the price is even higher.

How to use seafoam

Start the engine after parking the automobile somewhere well-ventilated. Allow the engine to warm up to operational levels. Since there will normally be a lot of smoke produced during this process, you must conduct it with the automobile in a well-ventilated place.

Keep automatic transmission vehicles in the park at all times. Manual gearbox vehicles should be put in neutral, and the parking brake should be engaged the entire time.

Read more: Diagnosing Common Engine Noises: Why You Shouldn’t Ignore any

Engine Cleanser

Locate the vacuum cleaner

Find the vacuum line. Find a vacuum line that distributes equally to all of the engine’s cylinders by opening the hood of the car. The vacuum line from the brake booster PCV will be the best choice for the majority of automobiles.

You might need to select a different option because various vehicles are configured in different ways. If unsure, consult a specialist before using this approach.

Disconnect the hose

Disconnect the chosen vacuum hose’s one end with care. Disconnect the hose going to the manifold if you’re utilizing the brake booster hose. You shouldn’t remove the check valve from the hose leading to the brake booster and you shouldn’t let Seafoam pass through the check valve while doing this.

Pour Seafoam into the vacuum hose

One-third to one-half of the bottle should be carefully poured into the disconnected hose. If required, place a funnel in the hose’s entrance and pour the Seafoam through it. The habit of sucking Seafoam into the hose is discouraged by the manufacturer.

Rev the engine simultaneously

A second person should crank the engine to 2000 RPM as you pour the Seafoam into the suction hose. Most likely, you’ll see a lot of white smoke coming from the exhaust. This is typical and shouldn’t raise any red flags.

Turn off the engine as soon as you have finished adding Seafoam to the suction hose, and then leave the vehicle idle for ten to thirty minutes. The Seafoam will sink into the engine deeper the longer you wait. A complete 30-minute wait would be preferable for engines with a lot of suspected buildup, while regularly maintained engines may just need to wait for 10 minutes.

Oil System Cleanser

Calculate the correct amount of Seafoam

For every 1 gallon (4 L) of motor oil, 2 oz (60 ml) of Seafoam is required. The Seafoam will be directly added to the oil in your car. Because Seafoam is formed of petroleum, it is okay to mix it with the oil and shouldn’t harm the car. When used in this way, Seafoam will re-liquify old fuel and deposits, cleaning the carburetor bowl and jets as a result.

Keep the engine cold

If the engine is still running, turn it off and wait until it is completely cold before moving on. Seafoam added at room temperature to hot oil that is burning might shock the carburetor valve springs and harm your car.

Add Seafoam into the carburetor

Put the calculated amount of Seafoam into the carburetor throat after removing the cover from the engine oil spout. Pour the Seafoam in using a funnel, if possible. Although not technically necessary, funnels can aid in lowering the risk of unintentional spillage.

Close the bonnet of the automobile, cap the carburetor throat, and operate the car normally for up to 250 miles (402 km). Once you have traveled between 100 and 250 miles (160 and 402 kilometers), you should have the oil changed. Seafoam is a strong addition, thus after traveling this far, the oil filter may struggle and the oil’s quality may suffer. The procedure is finished once the automobile has been driven and the oil has been changed.

Fuel Injector Cleanser

Calculate how much Seafoam you’ll require

Learn how many gallons your car’s gasoline tank can store. You must add 1 ounce (30 ml) of Seafoam for every 1 gallon (4 L) of fuel. The advantages of adding Seafoam straight to the gasoline tank are numerous. It can remove residue built up in the fuel injectors, enhancing the smoothness of your car’s operation. Additionally, it can stabilize the gasoline, lubricate the higher cylinders, and reduce moisture buildup in the fuel.

Fill the gas tank

Make a trip to the gas station and fill the car’s tank with high-octane fuel. When filling the tank, be sure to leave space for the calculated amount of seafoam to be added later. Although Seafoam can technically be used with any octane gas, using it with 91 octane or above is advised. Performance is boosted because fuel with a higher octane level needs more heat and compression to ignite. Under these circumstances, the Seafoam can also assist the car more.

Fill the fuel tank with the Seafoam

Pour the calculated amount of Seafoam into the gasoline tank using a long-neck funnel that has been placed inside the tank. To prevent spills, pour the product slowly. Additionally, using a funnel will assist in avoiding spills. It is practically impossible to pour Seafoam straight from the bottle into the fuel tank without using a funnel because of the shape of the bottle and the location of the fuel tank entrance.

Reinstall the fuel tank cap and drive your automobile for at least five to ten minutes at a constant speed. As you drive, the Seafoam should dissolve into the fuel, enhancing its quality while simultaneously cleaning the fuel injectors. To optimize the Seafoam’s effects, try to drive the car with this tank of gas until it is almost completely empty. The procedure is finished once this stage is finished.

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Do I add Sea Foam before or after gas?

Add a full can of Sea Foam to a low gasoline tank for optimal results. Run your truck for at least 20 miles after adding Sea Foam to the gas tank before refueling. As a result, the Sea Foam will have more time to circulate through the fuel system before being diluted by additional fuel.

Where is the best place to add Sea Foam?

Your gas tank and oil crankcase should both contain Sea Foam High Mileage (or Motor Treatment). Wait until you have a low tank (1/8 or less) in the gas tank. When you are almost out of petrol, add a full can of Sea Foam and continue driving. That will thoroughly clean the fuel system and important engine components.

How long does it take for Sea Foam to work?

How long does it take Sea Foam to clean the engine?

Allow the Sea Foam to soak into the deposit buildup for five to fifteen minutes. Restart the engine after the soak period is over and get ready to operate or drive for 30 miles. When it is safe to do so, don’t be afraid to run the engine hard because a loaded engine creates the heat and compression needed for effective cleaning.

How much Sea Foam do I add to the oil?

Does Sea Foam really work?

After years of untreated buildup, Sea Foam safely removes hazardous deposits from fuel injectors, intake valves, and chamber areas. It is particularly effective at resolving performance issues brought on by fuel residue and deposits.

Is Sea Foam a good fuel stabilizer?

Up to two years of fuel storage can be stabilized with Sea Foam Motor Treatment. In addition to preserving ignition vapors, adding protective lubricity, and preventing the growth of gum and varnish in fuel systems, adding Sea Foam to stored tanks of fuel can assist fuel in resisting evaporation.

Why is Sea Foam important?

Seafoam plays a variety of ecological functions in the marine environment, including supplying food and establishing habitat. Ecologically speaking, sea foam with a stable composition is more significant as a food source since it can endure longer and carry nutrients within the marine environment.

Is Sea Foam good for your skin?

Seafoam was used in the past to gently cleanse the body and face. Magnesium, a mineral that reduces tension, and silicon, a mineral associated with beauty, are both found in abundance in the sea foam extract. It gives the skin a clear and revitalized complexion while remineralizing and strengthening the skin.

That’s all for this article where we discussed the following;

  • What is sea foam? Benefits and drawbacks.
  • How to use seafoam.

Hope it was helpful. If so, kindly share. Thanks for reading.

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