Does Sea Foam Work? All About The Sea Foam

Yes. Sea Foam is something that will work for practically any car owner. 

For those who are not aware, Sea Foam is an all-around cleaning solution for biodiesel, gasoline, ethanol, and diesel engines. 

Besides getting all of your engine’s gunk out, a proper Sea Foam formula also allows vehicles to restore any performance that your vehicle may have lost.

In this article, we’ll be talking about everything that you need to know about Sea Foam. That way, you’ll know exactly how to use it and be sure that it’s the best engine cleaning solution.

What is Sea Foam?

What is Sea Foam?

Sea Foam Motor Treatment is an engine cleaning solution that’s made to rid your car’s engines of all kinds of dirt and debris that may have accumulated inside it. 

The company behind Sea Foam has been around for more than 70 years. Despite that, their best-selling product continues to be their Motor Treatment cleaning solution. Why? Probably because it can be used by almost anyone driving any vehicle without any sorts of problems.

Sea Foam Ingredients

Quite interestingly, the chemical formulation that makes up Sea Foam is exclusively composed of non-corrosive, harmless, and organic petrol-based chemicals. You may easily find Sea Foam’s ingredients to create your own cleaning solution but this isn’t recommended.

With all that being said, here’s a breakdown of all the chemicals that Sea Foam is made of:

Naptha25% to 35%
Isopropyl Alcohol (IPA)10% to 20%
Pale Oil40% to 60%

Depending on the product, these three ingredients are formulated at different ratios. For you to know mo regarding the subject, we suggest looking at these safety data sheets.

Since water doesn’t mix with gasoline and freezes on its own, causing pipelines to freeze, it can be dangerous for fuel tanks to contain. For that reason, Sea Foam contains isopropyl alcohol, which is well-known for its capacity to dissolve H2O into all kinds of fuel like gas and diesel.

Remember that products such as Sea Foam are strictly marketed as engine cleaners. They are not to be used as a replacement for engine oil. Never do this as it might cause severe damage to your automobile’s engine. In fact, your vehicle’s engine may need to get replaced altogether.

How to Use Sea Foam?

For mechanics, Sea Foam is something they use every day. However, normal people like us do not utilize the engine cleaning product regularly. Because of that, we can easily run into trouble when we’re using it for the first time.

Don’t worry though as we’ve got you covered. Below is every step that’s necessary for you to use Sea Foam motor engine treatment formula in practically any situation.

Regular System Maintenance:

If you’re performing regular maintenance on your fuel system, add 1 oz per gallon.

Automobile Engine Cleaning:

Car engine cleaning calls for you to make use of 2 or more ounces per gallon. 

Remember – the more Sea Foam that you add, the more it’ll clean your engine. Hence, it’s best if you utilize Sea Foam for engine cleaning solely when your fuel tank is low for the best results.

Injector Cleaning Machines

Make use of a 50/50 mix of Sea Foam and gasoline.

Diesel Machine Maintenance

Employ 100% Sea Foam for cleaning diesel injectors or for when you prime diesel fuel filters.

2-Stroke Pre-Mix

Simply add 2 ounces of Sea Foam per gallon.

Stabilizing Fuel For Storage

If you don’t plan on using your automobile for a long time, then it’s best that you stabilize its fuel for storage. The best way to do this is to add 1 oz of Sea Foam per gallon of fuel.

Once you’ve done what’s mentioned above, your fuel will stay stabilized for up to 2 years.

Does Sea Foam Really Work?

Does Sea Foam Really Work?

Sea Foam is an engine cleaner that’s been around for almost 80 years. As such, there shouldn’t be any doubts as to whether it works or not. Now with that being said, according to various surveys, Sea Foam has not left most of its consumers disappointed after it’s used.

It’s essential that you follow manufacturer instructions very precisely and carefully. Never mix it with petrochemical solvents or oil as you’ll risk destroying your engine. In addition, doing this might also cause your car to emit toxic gases or vapors that can leave you in the hospital.

Keep in mind that Sea Foam isn’t some magic substance that’ll automatically make your car’s engine spotless. Any automobile with a faulty fuel pump, bad fuel injectors, or any other underlying problems apart from carbon deposits cannot be fixed by your Sea Foam.

Advantages of Sea Foam

What makes Sea Foam better than other alternatives on the market? Let’s talk about all the different advantages that Sea Foam has so you’ll know why it’s your best option:

  1. Sea Foam is very versatile. It can be utilized on gasoline, biodiesel, diesel, ethanol, oil, as well as injector cleaning machines.
  1. Makes both fuel stabilizers and fuel injections spotless.
  1. Restores lost engine power by dissolving fuel deposits in your vehicle’s engine.
  1. Prolongs your automobile’s engine life by lubricating the upper parts of its cylinders.
  1. Safeguards the entire fuel system of your car.
  1. Resists varnish along with gum formation, and therefore, stabilizes your car’s fuel.
  1. Allow your engine to start more easily by preserving ignition vapors.

Disadvantages Of Sea Foam

Like almost everything else, Sea Foam isn’t perfect. Using it comes with some disadvantages that you and all other consumers should know about:

  1. Makes your engine consume more fuel. With that said, note that this only happens when you add too much Sea Foam to your vehicle’s gas tank.
  1. Causes potential issues with your car’s oxygen sensors. You see, most enthusiasts say that too much Sea Foam can make this occur.
  1. Not compatible with certain fuel injector systems. As mentioned earlier, Sea Foam is not a perfect all-in-one product. Engines from several car brands like Mercedes-Benz keep fuel flowing via a high-pressure pump, which isn’t meant to accommodate Sea Foam.

The Proper Way to Use Sea Foam

Here’s the proper way to use Sea Foam according to the brand’s website:

Regular System Maintenance

Add 1 ounce of Sea Foam per gallon

Engine Cleaning

Sea Foam cleans better if more is applied to your fuel. Therefore, add 2 ounces or more of the cleaning solution when your engine’s tank is low to get the best results.

Fuel Injector Cleaning

Make use of a 50/50 solution of Sea Foam and gasoline.

Diesel Injector Or Diesel Primer Maintenance

Utilize 100% Sea Foam cleaning solution for cleaning diesel injectors or priming your fuel filters.

2-Stroke Pre-Mix Cleaning

Add 2 ounces of Sea Foam per gallon when your tank is low on fuel.

Fuel Stabilization

Apply 1 ounce of Sea Foam per gallon to stabilize your fuel. 

Fuel that’s stabilized with Sea Foam should remain stabilized while stored for up to 2 years.

Some Important Tips

  1. Add Sea Foam each time you refuel if you’ve got a car with a smaller engine.
  1. Cars and trucks that are regularly driven should receive Sea Foam every 3000 miles.
  1. Sea Foam should be applied every 3 months to regularly used engines.
  1. Make Sure to add Sea Foam to the fuel tanks of any engine that isn’t used regularly.

Things You Should Know

  • Use Sea Foam Exclusively When It’s Needed

Engine cleaning solutions such as Sea Foam can be abused. And yes, this remains true even if your product is said “non-abrasive” on the label. With that being said, don’t use Sea Foam too much, or else you run the risk of permanently causing damage to your automobile’s engine.

  • Never Spray Sea Foam Into Your Vehicle’s Air Intake

Spraying Sea Foam into the engine intake of your vehicle cause permanent damage. With that in mind, it’s important that you only apply Sea Foam directly to your car’s gas tank.

  • Don’t Forget About Proper Storage

The best place to store Sea Foam is in a place that’s cool, dry, and away from children. Your drawer or lockable cabinet are both great options. Alternatively, you may put your Sea Foam inside an insulated box if you don’t what’s mentioned above.

  • Stick To Sea Foam’s Manufacturer Recommendations

Like most chemical solutions, Sea Foam can become a dangerous substance when you treat it wrongly. Thus, it’s essential that you adhere to all of the manufacturer’s recommendations. That way, you can be certain that you’ll get to avoid any potential risks.

3 Best Sea Foam That Seems Fit For You

#1- Sea Foam SF-16 Motor Treatment

Sea Foam SF-16 Motor Treatment - 16 oz. , white

Sea Foam’s flagship product is its SF-16 motor treatment cleaning solution. The product is over 70 years old, meaning it has stood the test of time. It’s meant to be a universal cleaning solution that can be utilized on all engines. However, as seen above, there are different variations for all sorts.


Works On Gas And Diesel Engines – Mechanics have dubbed Sea Foam’s SF-16 treatment to be an all-in-one solution for all types of engines. The stuff can be used on cars, generators, and marine craft. If anything, the only thing you can’t use SF-16 treatment on is electric automobiles.

Stabilizes Fuel For Up To 2 Years – Stored gasoline and diesel evaporate after a while. SF-16 can help slow down the evaporation process. Furthermore, it prevents gunk and varnish from forming. Last but not least, the SF-16 also helps preserve ignition vapors for up to 2 years.

Cleans Your Engine – The special formula that Sea Foam’s SF-16 treatment is composed of is capable of making the insides of your vehicle’s engine spotless. Needless to say, it doesn’t guarantee that you’ll have a completely clean engine after applying SF-16 treatment.

Suitable For Older Vehicles – You may utilize SF-16 treatment on older cars without issues. It’s even good for aged machines because it’s capable of cleaning carburetor passageways.

Very User-Friendly – Part of the reason why Sea Foam’s SF-16 treatment is so successful is that it’s a breeze to use. Those without prior experience with the formula are sure not to encounter any problems when using it for the first time for any of its many purposes.

Suitable for all engine typesReduces your milage
Cleans fuel injectors and carburetorsMay mess with your vehicle’s oxygen sensors
Cleans upper engine areas and crankcasesIncompatible with certain fuel injector systems
Prevents corrosion and adds lubricationHighly flammable
Very easy to use

Final Thoughts…

The SF-16 motor treatment cleaning solution is Sea Foam’s flagship product. It does everything that you need to stabilize your fuel and make your engine spotless. Furthermore, it works on both diesel and gasoline vehicles, truly making it the ultimate all-in-one cleaning solution.

#2- HM-16 High Mileage Motor Treatment

Sea Foam High Mileage Motor Treatment HM16, 16 oz, Pack of 1, Silver

It’s no secret that Sea Foam lowers your mileage. Fortunately, the brand has developed a special formulation that improves the fuel consumption of gasoline cars and trucks. Also, it cleans fuel injectors, carb jets, reduces car engine wear, and eliminates harmful crankcase residues.


Improves Mileage – As indicated on its label, the Sea Foam HM-16 formula improves the fuel consumption of your vehicle. It’s most effective for SUVs and trucks that have got over 75,000 miles on them.

Reduces Engine Wear & Tear – Like other Sea Foam products, the HM-16 formula reduces engine wear and tear. When used properly, it’ll surely increase your engine’s lifespan.

Cleans Your Engine – The Sea Foam HM-16 cleaning formula has been proven to remove the gunk and other nasty material that may be inside your engine. As a result, using it will make your automobile run better, which is great news for any driver.

Stabilizes Your Fuel – With HM-16, you’ll be able to stabilize your gasoline and prevent it from evaporating for 2 years. Also, you will get to rid your tank of any gunk that might form.

Works On All Types of Gasoline Engines – You may use Sea Foam’s HM-16 solution on any gasoline engine. For a hassle-free experience, it’s best that you follow the instructions mentioned above. In addition, never utilize the solution on a diesel engine.

Drastically improves your vehicle’s mileageDoesn’t work with diesel
Prolongs your engine’s lifespanStill causes increased fuel consumption
Stabilizes gasoline for 2 yearsHighly flammable
Cleans the insides of your engineIncompatible with certain fuel injector systems
Suitable for all types of gasoline carsMay mess with your vehicle’s oxygen sensors

Final Thoughts…

With the price of fuel nowadays, the Sea Foam HM-16 formula could be a lifesaver. It will make your car run better for much longer. However, sad to say, it still cannot normalize fuel consumption. You’ll still be using more gas than when you’re not using HM-16.

#3- ST20 Truck & SUV Motor Treatment

Sea Foam Truck & SUV Motor Treatment ST20, 20 oz

SUVs and trucks are more popular than ever. Because they’re larger vehicles, they’re equipped with bigger engines. The people behind Sea Foam knew that their standard formula wouldn’t be suffice for such engines. For that reason, they released the ST20 Truck & SUV motor treatment.


Specially Formulated For Bigger Engines – Pickup trucks like the Ford F-150 or the Chevrolet Silverado have large engines designed with the power to carry heavy loads. Such engines don’t have the conventional needs of a normal engine. They need a Sea Foam formula that is crafted just for them.

Works With Gasoline And Diesel – Sea Foam’s products often exclusively function with either gasoline or diesel engines. The ST20 Truck & SUV Cleaning Formula works on both diesel and gas-powered vehicles, making it very versatile.

Stabilizes Your Fuel For Up To 2 Years – As you’d expect, this Sea Foam formula also has the ability to stabilize your fuel for a maximum of 2 years. In addition, it’ll also keep your tank clean.

Cleans Your Engine – When applied properly, the ST20 Sea Foam formula will make your car’s engine spotless. It’ll remove any gunk that may have accumulated throughout the years.

Prolongs Your Vehicle’s Lifespan – Because ST20 cleans your auto’s engine, it improves its performance. In doing so, the solution prolongs your vehicle’s lifespan, which is great news if you’re the type who does not like going to the dealership to get a new automobile every year.

Ideal for larger vehiclesDecreases your car’s mileage
Suitable for both gasoline and diesel enginesHighly flammable
Keeps your fuel stabilized for up to 2 yearsIncompatible with certain fuel injector systems
Cleans your engineMay mess with your vehicle’s oxygen sensors
Prolongs the lifespan of your automobile


Sea Foam’s ST20 cleaning solution is your go-to if you’ve got a larger vehicle to maintain. The formula stabilizes your fuel, cleans your engine, and prolongs the life of your car. Aside from that, it’s also extremely versatile since it can be used on both gasoline and diesel machines.

Can You Put too Much Sea Foam in Gas?

The formulation of Sea Foam’s products is mainly derived from petroleum, which doesn’t cause damage to your car’s fuel system or engine components. Now with that out of that way, in the event that you think you’ve applied too much Sea Foam, simply add more gas to your tank.

How Long Does It Take For Sea Foam to Work?

So how long does it take for Sea Foam to work? It really depends. Remember that when more of the solution is added to your vehicle’s tank, the more it’ll clean. Nevertheless, there’s no specific timeframe wherein the product’s results are guaranteed to emerge. Therefore, our recommendation is for you to wait for Sea Foam to improve your engine’s performance.

Can I Put Sea Foam in a Full Gas Tank?

Yes. It’s possible to put Sea Foam in a full tank of gas. However, doing this is not recommended by the manufacturer. Instead, you should apply the dosage rates stated by the manufacturer. That way, you can be certain that you’ll not be causing any damage to your automobile.

Wrapping Everything Up

Sea Foam is an excellent all-around cleaning solution. The product has special versions for cars of all types. Furthermore, its been around for almost 80 years has proven that it’s a reliable go cleaner and fuel stabilizer. That said, keep in mind that Sea Foam isn’t perfect. It isn’t suitable for certain engines. Moreover, it could be harmful when used or stored in the wrong manner.

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