What is the Best Oil Additive to Stop Engine Knocking?

Are you wondering how engine oil additives work and how to choose the best oil additive to stop engine knocking and improving engine performance? If yes, you are at the right place. This guide will help you understand what to look for when choosing an oil additive to eliminate engine knocking , and several important tips for using oil additives safely and effectively.

If you have ever heard a cranky sound from under the hood of your car, then the possible cause of it might be a knocking engine. The reason behind a knocking engine can be several things, and that include bad spark plugs, uneven air distribution, incorrect ignition, etc.

These sounds are not only irritating but can also be dangerous to the point that they can damage your car engine in the long run. You can use oil additives to stop engine knock but knowing how and when to use it is the catch!

If not addressed, engine knocking can lead to dangerous conditions for your car engine. It can be critical to the point where your car’s engine can stop working.

best oil additive to stop engine knocking
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The engine knock oil additive works as a savior to not only protect the car engine but also prevent it from further knocking. It lubricates the engine and works as a protective cover to prevent further corrosion.

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In this article, we will discuss everything related to getting rid of engine knock. And we will also mention what are the best oil additives to stop engine knocking, which can save you both time and money in the long run.

So, what are you waiting for? Read the entire article and discover the desired details now!

What Causes Engine Knock?

Before you move on to know what are the best oil additives to use when there is an engine knocking problem in your car, you must understand what causes knocking in your car’s engine in the first place.

Here we have listed some of the most common and possible causes of knocking sound in the engine. Check them out one by one to understand the issue properly and identify the main culprit quickly. Here we go:

Low Octane Rating

When you use gasoline in your vehicle engine that has a lower octane value than the recommended level, it can lead to a deteriorating fuel quality, which in turn leads to an engine knocking sound.

The various types of fuel are assigned names and numbers based on their octane ratings. When the assigned number is high, the fuel is considered to be more refined. Hence, when there is a low octane rating of the fuel, it will lead to a knocking engine sound.

Faulty Spark Plugs

This is one of the significant engine knocking causes that you must look out for! When you have a faulty spark plug in your car engine system, it is bound to make an engine knocking sound.

The spark plugs are responsible for causing the spark in the engine’s combustion chamber. When the plugs are faulty or incorrect, it may cause incorrect detonation, which in turn will produce an engine knocking sound.

Lean Air or Fuel Mixture

If you are still wondering about what causes engine knock, then you must know that the presence of too much oxygen in the fuel may also lead to the same problem.

When there is a lean fuel mixture, it will result in multiple detonations as a result of lesser oxygen in the fuel mix, and that, in turn, will lead to engine knocking.

And if you do not attain this problem for extended periods, it may lead to a damaged cylinder and piston.

Low Oil Pressure

This is another reason to look out for when you are thinking about what causes an engine to knock! When there is low oil pressure in the engine system, it will lead to a knocking sound in the engine.

The oil is mainly responsible for maintaining lubrication and dissipating the heat in parts of the engine like valve stems, camshafts, rocker arms, etc.

Eventually, the knocking sound may increase before the engine starts properly, and the oil is dissipated entirely around these parts. And when the pressure is low, it will take time to get dissipated, which in turn will start making a knocking sound.

Carbon Deposits

Before you get to know how to fix engine knocking, you must know the exact reason as to what is causing it in the first place! And having excess carbon deposits in carbon-based fuel will cause the engine knocking sound to increase.

The fuels like diesel or gasoline have high carbon content, and sometimes there can be excess carbon in these fuels. The excess carbon can accumulate in the combustion chamber, spark plugs, valve, cylinder wall, piston, and other parts of the engine system.

This can lead to increasing compression and decreasing the chamber volume, which will eventually lead to engine knocking at some point.

These are some of the possible causes why engine knocking occurs in our cars. And the best way to get rid of engine knock is to use oil additives. We will get to know some of such top-quality oil treatments and best oil additive to stop engine knocking but before that, let us discuss what are the benefits of using these oil additives and how they will protect our car engine systems!

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What Engine Oil Additives Do to the Engine?

Oil additives not only treat the engine knocking sound but also have numerous other advantages. In this section, we will discuss a few such amazing benefits of using engine oil additives.

So, let’s read all the important points and then decide whether you should use the engine oil additives to get rid of engine knock or look for other solutions.

Environment Friendly

If you have second thoughts about using oil additives and often think should you use engine oil additives, then you must know that using it is suggested because it is environment friendly.

The oil additives are Eco-friendly in the way that it reduces carbon emission. It doesn’t impact the environment in a negative way like other additives.

Increase Overall Engine Performance

You may think, do engine oil additives really work? It does! Not only on the engine knocking sound but also on the overall engine. It protects the engine and increases the overall performance.

It prevents wear and tear of the engine components and also helps in the lubrication of the entire engine system. On top of that, it promotes engine oil cleanliness that helps in burning excess chemicals into ashes.

Improves Viscosity

Another significant reason why you should use engine oil additives is that they improve viscosity. With time the car engine loses its viscous nature and is prone to more damage.

And if unattended for a more extended period, it may lead to more complications when the engine is heated and cooled. Thus, using oil additives to keep the Viscosity Index at normal reading is another popular benefit you may look out for!

Prevents Corrosion

When you use a premium-quality and best oil additive to stop engine knocking, it is also essential that you take care of its corrosive property! The engine oil contains a certain type of acid that can damage the engine parts severely. But when you add the oil additives to the engine, it will subsequently help fight the acid build-up in the system and treat the engine oil by neutralizing the acid. This helps in preventing further damage to the car engine.

Improves Block Leaks and Seals

Are you still thinking about what are the benefits of using engine oil additives? Well, consider this last one as another significant benefit!

When you own a vehicle that is 5 or more years old, it is expected that the car engine will not be in proper condition with just regular maintenance, and engine oil treatment is a must in such long times.

And with the addition of the engine oil additives, problems like fuel leaks, blocked seals, regular wear and tear, cracks, and other such issues are solved effectively.

Besides these, there are other benefits too, like these are quite economical, provide enough power and promote oil cleanliness as well. Now, we will discuss what is the best oil additive to stop engine knocking in the following section.

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7 Best Oil Additives to Stop Engine Knocking

This is the most significant part of the article, probably what you were looking for! In this section, we will discuss the properties of a few products that are good for your car engine oil that not only controls the engine knocking sound but also ensure a high-end overall performance of your car engine.

So, are you ready to know about what is the best oil additive to stop engine knocking? Keep reading to know more.

Lucas Heavy Duty Oil Stabilizer

If you are looking for a high-end and best oil additive to stop engine knocking, you must buy the Lucas Heavy Duty Oil Stabilizer. It is an efficient product that helps increase the oil life by at least 50%. When you apply this oil additive to the engine, it also reduces the total consumption of the engine oil.

The best part about this product is that it eliminates the dry starts and raises oil pressure to an extended level.

lucas heavy duty oil stabilizer

The package contains auto parts, replacement parts, automotive accessories, and other relevant items. It is a heavy-duty oil stabilizer made of 100% petroleum product that not only eliminates the dry starts but also reduces friction and regular wear and tear of the engine.

All in all, if you are looking for the best oil additive for engine knock, then you can go with the Lucas Oil Stabilizer without any doubt!


  • Increases power and miles per gallon.
  • Safely blends with other automotive lubricants.
  • Increases oil life up to 50%.
  • Raises oil pressure.
  • Eliminates dry starts.
  • It comes in 2 pack size options.
  • It has an affordable price range.


  • Thicker consistency.
  • No warranty from manufacturers.

Archoil Oil Additive

This is another good oil additive to stop engine knock easily. It has a 16oz AR9100 Friction Modifier that treats one power stroke quickly. It also fixes 6.0L, and 7.3L Powerstroke cold starts injector problems and reduces the regular wear and tear by extending the component life of the car engine.

Besides all these fantastic features, this oil additive also reduces engine noise, heat, and vibration. It is compatible with all kinds of diesel and gasoline engines, hydraulics, gearboxes, differential, and power steering systems.

archoil oil additive

It eliminates injector problems and dissolves Powerstroke cold starts. The solid boundary film provides lubrication that provides extreme pressure protection. The power strokes prevent static friction, rough idling, bucking, or smoking until the engine is properly started. It enhances the vehicle’s performance by executing a smoother and quieter operation.

Archoil AR9100 Oil Additive has a long-lasting effect on the vehicle engine, ensuring you don’t have to rebuy the oil additive frequently. Overall, if you’re looking for the best oil additive to stop knocking, this is the one for you!


  • Reduced friction improves efficiency and power.
  • Remove and sludge carbon deposits in the engine.
  • Extended oil life cycle.
  • Ample load-carrying capacity under extreme operating conditions.
  • Smooth and quiet vehicle operation.


  • A bit pricey.

Sea Foam Motor Treatment

Out of all the engine oil additives mentioned in this list, the Sea Foam Motor Treatment oil has superior qualities. It has an sf16 16oz motor tune-up that enhances the engine performance.

It is made of 100% pure petroleum, which makes it an even better choice. It liquefies the gum and varnish deposits and internal engine contaminants to ensure the quality of the oil is taken care of!

The best part about this oil additive is that it has both EPA and Pea registration which qualifies its quality.

sea foam sf-16 motor treatment

It has a straightforward usage kit which makes the application easier. It is compatible with all kinds of vehicles, including gas and diesel motors and truck and SUV motors.

It also controls moisture in fuels and stabilizes fuels. You can use it on gas, diesel blends, and gas-ethanol blends vehicles. The Sea Foam auto marine motor treatment has better noise control features, so if you were thinking about what is the best oil additive for noisy lifters, then go for this!

According to many car and pickup truck enthusiasts, Sea Foam Motor Treatment is the best oil additive to stop engine knocking and improving engine performance.


  • It comes in 3 different style options.
  • Very low price range.
  • Liquefies gum and varnish deposits.
  • Lubricates upper cylinders.
  • Stabilizes gas and diesel fuels for up to 2 years.
  • Easy and simple use kit for quick application.


  • No good customer service.

Marvel Mystery Oil

Applying an oil additive is the best way to get rid of engine knock. And the wiser way is to choose the right product to serve the purpose. The Marvel Mystery Oil is an extravagant engine oil additive that ensures the work and performance of your engine are rightly managed.

It provides top-end lubrication to all the significant parts of the vehicle engine and ensures that the overall performance of the engine is improved. It is essential to restore power and fuel economy to enhance vehicle performance.

marvel mystery oil

The advanced engine technology stabilizes the fuel for months and keeps the condition of the engine up to date. This, in turn, promotes easy startup of the engine as well. So, if you have a problem that the engine knock on startup then goes away, then you can use this oil additive very easily.

It comes with a 1-gallon pack that contains 128 ounces of oil which is sufficient for the overall usage of most vehicle types. It reduces cold oil starts and is all-weather compatible. So, no matter how cold or hot the weather around you is, Marvel Mystery Oil additive will work well in maintaining vehicle engine efficiency.


  • It prevents rust and corrosion in the long run.
  • Easy to apply.
  • Long-lasting protection with unparalleled lubrication.
  • All-weather compatible.


  • A bit pricey than others in comparison.

Liqui Moly Cera Tec Friction Modifier

Are you still wondering about what are the best oil additives to stop engine knocking? Well, the Liqui Moly Cera Tec Friction Modifier is another product you will love using on your car!

This excellent engine oil additive doesn’t only control the knocking sound of the engine but also ensures it lasts longer and becomes more efficient. It is mixable with almost all kinds of commercially available vehicles with absolutely no deposits due to commonly used filter systems.

liqui moly cera tec friction modifier

It can resist all kinds of weather, be it too cold or too hot, and when your car engine has Liqui Moly Cera Tec Friction Modifier additive oil, you can be assured of its power-packed efficiency even in the worst weather conditions.

This high-tech ceramic wear protection remains stable under dynamic load and high thermal conditions. With complete engine protection and power-packed efficiency, this is genuinely another best engine treatment to stop knocking sound.


  • A low friction rate improves efficiency.
  • Prevent direct metal-to-metal contact.
  • It has an affordable price range.
  • Smoother performance.
  • Easy and quick to apply.
  • Lasts for a more extended time.


  • No warranty from manufacturers.
  • No different style or size options are available.

Lucas Oil Octane Booster

If you are looking for the best oil additive for engine noise, this one’s for you! And not only the noise but the Lucas Oil Octane Booster also enhances the overall performance of the car engine effortlessly.

With an easy and quick application procedure, this one is undoubtedly your go-to product to control the engine knocking sound. It has an environmentally friendly nature that promotes clean fuel burn with very few harmful emissions.

lucas octane booster

Not only for cars or trucks but this great oil additive can also be used for carburetors and fuel-injected engines. It can also be safely used on oxygen sensors, turbos, and catalytic converters.

The brand suggests that it is 3 times more efficient than other such products in the market. With high-end performance and long-lasting effect, this is undoubtedly the engine knock oil treatment you have been looking for so far!


  • Easy to apply.
  • Lasts longer.
  • Improves overall performance.
  • It has an affordable price range.
  • Ethanol-free.
  • Environment friendly.


  • It comes in 12-pack size, so you do not get a single piece that increases the total cost of the product.
  • No other style or pack size is available.

BG MOA Engine Oil Supplement

In the list of the top 7 best oil additives to stop engine knocking, this might be last, but when it comes to performance, the BG MOA Engine Oil Supplement is undoubtedly not the last!

It has impeccable properties have earned it a place in the top 7 list of best oil additives in the market. It allows safe and extended oil change intervals, so you don’t have to apply the oil additive too frequently to get better results.

In short, it lasts relatively longer than usual. On top of that, it ensures the reliability and efficiency of the critical engine components and does not let them collapse in the long term.

bg moa engine oil supplement

It also prevents excessive oil consumption by the engine, which works as a boon for vehicle owners who own vehicles over 5 years old. Not only that, it is compatible under all weather conditions, which means no matter how hot or cold the weather is, your car engine will run super efficiently.

BG MOA provides a long-lasting effect with the overall increased performance of the engine besides just controlling the knocking sound. All in all, your search for the best engine oil additives to stop knocking sound ends here!


  • It has a very affordable price range.
  • Ensures high-end performance with long-lasting effect.
  • Quick and easy application procedure.
  • All-weather compatible.


  • It does not have multiple style or size options.
  • No warranty from manufacturers.

What are the Best Oil Additives to Stop Engine Knocking? – Author’s View

Using oil additives to stop engine knock is one of the most prominent methods to control the issue of engine knocking. No matter how worse the condition of the engine knocking sound is when you use the right oil additive, the problem is sure to get away soon.

If you have read the whole article, you already know the best products to serve the purpose. You have also got an idea about the possible causes of engine knocking and the best benefits of using one.

While the best way to get rid of engine knock is to use an oil additive, is it possible to choose one amongst these 7 high-quality oil additives to stop engine knocking.

Each of them possesses qualities that are unique and different from the others. Some have an affordable price range while some have long-lasting effectiveness, but overall, almost all of them effectively control the engine knocking sound to an extended level. However, if you ask for any recommendations, then I would suggest buying the:

These three engine oil additives have superior qualities that make them trustworthy. I would personally recommend buying Lucas Oil Octane Booster as the best oil additive to stop engine knocking if you have a problematic engine knocking issue. However, all the others mentioned in the list are effective enough to serve the purpose.

Please take a look at all the top-rated and best oil treatments listed above and decide what is best for your engine-knocking condition!

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About Jace Cuban

I am an automotive enthusiast who loves to be around cars and pickup trucks. Applying innovative car care products and installing different latest car accessories are my hobbies. Also, I love sharing my adventurous experience with car lovers.

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