Did you know that you can use an oil treatment for a knocking engine? With a simple oil treatment, you can get rid of that annoying engine knock once and for all. If you are wondering, what is the best oil additive to stop engine knocking, we will answer that question. Let’s look at the available products in-depth to find the best for your automobile.


Preview

Product

Size

Engine Compatibility

Check Price

LUCAS LUC10013 10013 Fuel Treatment - 1...

LUCAS LUC10013

1 gallon, 32 oz.

All

Chevron Techron Concentrate Plus Fuel System...

Chevron Techron Concentrate

12 oz., 20 oz.

All gasoline engines

Red Line (60103) Complete SI-1 Fuel System...

Red Line (60103)

Complete SI-1

15 oz.

All gasoline engines

Lucas Oil 10026-PK12 Octane Booster - 15 oz...

Lucas Oil 10026-PK12 Octane Booster

15 oz. (Pack of 12)

All gasoline engines

Klotz Higher Octane Booster, 128 Ounce Gallon

Klotz Higher

Octane Booster

16 oz., 1 gallon

All gasoline engines

Marvel Mystery Oil 50665 Ultimate Fuel and...

Marvel Mystery Oil

50665

12 oz.

All engines

104+ (10406-6PK) Octane Boost - Boosts Octane...

Gold Eagle 104+

10406-6PK

16 oz.

All gasoline engines


How Do Oil Additives Help Knocking Engines?

If you want to know how to fix engine knock, it makes sense to look at additives. Oil additives have been proven to alleviate the noises, especially when combined with zinc. This mineral is a known performance booster. Solutions with phosphorus also provide protection and reduce the metal to metal contact that occurs in car engines. Oil additives change the viscosity of the motor oil and can even reduce sludge. This allows the engine to run at optimal levels.


Factors to Consider When Choosing Oil Additives

Chemical Composition

When you want to find the best oil additive for engine knock, it is typically recommended to look for products with zinc and phosphorus. While these minerals will reduce the knock, you should also know that they could create damage to the catalytic converter over time. Read through the reviews to see what other customers have experienced.

Increased Miles Per Gallon

If the engine performance has been optimized, you should also expect to see an increase in fuel economy. As the engine struggles less to function, it will burn less fuel. While it cost money to provide engine treatments, you could make up that expense in the money saved on gasoline or diesel fuel.

Oil Viscosity

You don’t want to use an engine additive that isn’t meant with your oil viscosity. Each engine requires a specific viscosity to run at its best. You will want to check with the owner’s manual to ensure you are using the right oil and an appropriate additive. Otherwise, you could create more damage than good.

Prevention of Rust

With the right chemical composition, you will protect your engine from further damage. As the additive cleans out the sludge and gunk, it also provides a thin layer of protection on the metal parts. This doesn’t just reduce friction but keeps the components from rusting over time. It’s like having an engine insurance policy.

Adaptation to Climate

You want to think about the climate you drive in before you purchase an additive. Some don’t work as well in extreme heat or frigid cold temperatures. What might work for someone in Florida might not perform as well for you while driving the streets of Maine in the middle of winter.  

Engine Compatibility

The majority of engine additives can be used in a variety of motors, even motorcycles and four-wheelers. Other products are dedicated to a specific fuel type in mind. You don't want to use anything that’s not meant for your engine type, or you could create permanent damage, which will cost you far more than the additive did.


7 Best Oil Additives for Engine Knocking Reviewed

1. LUCAS LUC10013

Product Specifications

Size

1 gallon, 32 oz.

Cleans Sludge

Yes

Reduce Friction

Yes

Chemical Composition

Oils, additives, detergent

Engine/Motor Oil Compatibility

All

This Lucas oil treatment for engine knocking is one of the top-rated solutions. If you want to stop engine knock, you owe it to your automobile to give this Lucas formula a try. It not only cleans the fuel system but also keeps it lubricated for a longer life. It also neutralizes low-sulfur fuel problems. Overall, you can expect more power and better fuel economy. It’s the ideal solution for gas or diesel engines, as well as fuel injected or carbureted.

Some users even dump some of the Lucas treatment in their tanks to pass smog tests, because it decreases emissions. You can purchase this product by the gallon, so you will have plenty on hand when you need it. If you don’t want that much, consider purchasing the smaller bottle instead. Plus, the price is reasonable, considering how highly it’s rated and how much you can receive at one shot. If you want to avoid costly engine repairs, this is the ideal way to protect your car’s engine and fuel system.

Pros

  • Compatible with any engine
  • Treats up to 400 gallons
  • Highly rated
  • Buy in bulk

Cons

  • Might take some time to work

2. Chevron Techron Concentrate

Product Specifications

Size

12 oz., 20 oz.

Cleans Sludge

Yes

Reduce Friction

Yes

Chemical Composition

Polyetheramine (PEA)

Engine/Motor Oil Compatibility

All gasoline engines

Another oil additive for engine knock to consider is from Chevron. This product not only cleans and restores but also protects the fuel system. You can use it to increase the performance of fuel injectors, intake valves, carburetors, and combustion chambers for seamless engine operation. If you notice a loss of power, trouble accelerating, poor fuel economy, or you are having issues with the fuel gauge sensor, this product might help.

It also reduces engine surge, rough idle, hesitation as well as spark plug fouling. With this Chevron treatment, you can improve the cold start performance and help the fuel remain stable for up to a year. It’s recommended to use it every 3,000 miles, which is more frequently than some others. Plus, you can only use this formula on gas engines. But, you can dump this into your RVs, ATVs, boat, or dirt bike for increased performance in all vehicles. If you have a diesel, you will want the Techron D instead.

Pros

  • Reasonable price
  • Highly rated
  • Cleans and restores
  • Improves fuel economy

Cons

  • Must be used often

3. Red Line (60103) Complete SI-1

Product Specifications

Size

15 oz.

Cleans Sludge

Yes

Reduce Friction

Yes

Chemical Composition

Polyetheramine (PEA)

Engine/Motor Oil Compatibility

All gasoline engines

Many users swear that the best product for engine knocking is this formula from Red Line. This fuel system cleaner doesn't just remove buildup but also prevents further corrosion. With the cleaner, your car's injector valves, carburetors, and combustion chamber run smoothly with fewer deposits. Because the treatment also enhances the stability of gasoline, you receive a more efficient burn for a better fuel economy. 

You can use one bottle per tank to get the most effective treatment. With this schedule, you are looking at a little more of an expense, but Red Line claims you will achieve nearly 100 percent of efficiency after just one treatment. When looking at the customer reviews, we see that it has become an ideal solution for car knocking, so it might be worth the cost to you. Of course, it still comes in far cheaper than what you would spend on an expensive engine repair.

Pros

  • Works in one treatment
  • Highly rated
  • Removes build-up
  • Improves performance & fuel economy

Cons

  • Expensive

4. Lucas Oil 10026-PK12 Octane Booster

Product Specifications

Size

15 oz. (Pack of 12)

Cleans Sludge

No

Reduce Friction

Yes

Chemical Composition

Solvent naphtha (petroleum)

Engine/Motor Oil Compatibility

All gasoline engines

If you want to know how to stop engine knock, join with the other customers that found success with this Lucas formula. While it doesn’t come with a cleaner like some of the other options, it does provide a boost that allows for a cleaner fuel burn. In return, the engine produces fewer emissions and maximizes horsepower. You can use it with your turbocharged engine and won’t have to worry about damage to either the catalytic converter or oxygen sensors.

One bottle will treat up to 25 gallons of fuel, which is why the company offers a case at a time. Of course, this will cost you more upfront, but you have to consider the fuel savings down the road. If you want to get rid of motor knocking, you need to trust a leader in the industry. Just browse through the customer reviews, and you will see why this product comes highly rated.

Pros

  • Highly effective
  • Boosts performance
  • Made by a leader in the industry
  • Reduces emissions

Cons

  • Doesn’t remove sludge

5. Klotz Higher Octane Booster

Product Specifications

Size

16 oz., 1 gallon

Cleans Sludge

Yes

Reduce Friction

Yes

Chemical Composition

Tetraethyl lead substitute

Engine/Motor Oil Compatibility

All gasoline engines

Sometimes engine knock is caused by not having enough octane in the fuel. With this treatment from Klotz, that won’t be a worry for you any further. With this highly-rated fuel system solution, you effectively raise the pump gasoline octane by up to ten numbers. It also contains a tetraethyl lead substitute, which adds further lubrication and protects engine components.

With this injector and carburetor cleaner, you have ensured a more stabilized flame front with a controlled burn speed. Not only does this produce more performance, but it also helps retain better fuel economy while lowering emissions. Plus, you protect the car engine from further damage. You can purchase it as a pint for one use, or splurge on the gallon if you plan to use it often. Of course, either of these options is more expensive than most, but the customers rave about the benefits, making it a decent value anyway.

Pros

  • Works fast
  • Increases performance
  • Cleans and lubricates
  • Reduces emissions

Cons

  • Expensive

6. Marvel Mystery Oil 50665

Product Specifications

Size

12 oz.

Cleans Sludge

Yes

Reduce Friction

Yes

Chemical Composition

Mineral oil

Engine/Motor Oil Compatibility

All gasoline engines

It’s no mystery that this treatment is ideal for optimizing engine performance. The Marvel Mystery Oil remains one of the top choices to reduce engine knock. It can be used with any engine, including hybrids and GDI. With this solution, you can expect up to 99 percent reduction in deposits. In addition, it prevents corrosion and rust that comes from fuels that have ethanol.

The advanced technology allows the fuel to be stabilized for months after just one application. Plus, it promotes easier start-ups, even in cold weather. With the lubrication that comes from using the Mystery Oil, you can also expect better fuel economy and additional power.

Even though it’s a highly rated treatment, you can get your hands on it for a minimal price. In fact, it comes in a lot cheaper than most of what’s on the market. According to the reviews, you shouldn’t notice a difference between this and formulas that are more expensive.

Pros

  • Highly rated
  • Increases performance
  • Boosts fuel economy
  • Low price

Cons

  • Might take time to work

7. Gold Eagle 104+ 10406-6PK

Product Specifications

Size

16 oz.

Cleans Sludge

Yes

Reduce Friction

Yes

Chemical Composition

Proprietary blend

Engine/Motor Oil Compatibility

All gasoline engines

If boosting power is just as important as reducing engine knock, this formula from Gold Eagle might provide what you need. Not only does it upgrade the octane number, but it helps you achieve better fuel economy. Plus, the detergents help to clean out the fuel injectors to provide longer life. If your current vehicle is suffering from hesitation, pings, or knocks, you might get the solution you need with this bottle.

You can use one bottle to treat up to 18 gallons of gasoline. It is also safe for oxygen sensors and catalytic converters. One bottle measures 16 ounces, but you can purchase a pack of six to make things easier. If the cost seems shocking to you, just remember that this formula prevents more costly engine repairs later. Plus, a quick look at the customer reviews shows you that this product does what it says, making it worth every penny.

Pros

  • Top rated
  • Cleans injectors
  • Safe for sensors and catalytic converter
  • Available in a pack of six

Cons

  • Not street legal

Chemical Compounds in Oil Additives

Oil additives contain a variety of chemical compounds, each with its own benefits. LOAs (lubricating oil additives) reduce the friction and are often made with phosphorus. You might also find boron or molybdenum. Phosphorus commonly comes with the zinc and is used to boost performance.

With Magnesium Sulfonates, you can expect to remove the oil impurities, while inhibiting rust and reducing sludge. Extreme pressure agents, such as sulfur-phosphorus, potassium-borate, or chlorine, will create a film that reduces wear. There is also the possibility to get a compound with nanoparticles that increase horsepower and fuel economy without hurting the catalytic converter.


What Causes Engine Knock

Why is my engine knocking? That’s a common question heard by mechanics across the country. To learn how to stop engine knocking, you must first understand the cause. Unfortunately, there are many reasons for engine knock. It could be that the fuel is burning unevenly in the cylinders, creating premature detonations of the engine's fuel and air mixture. It could also be a faulty spark plug, the presence of carbon buildup on the cylinder walls, or just low-quality fuel.


How to Fix & Protect from Engine Knock

It's always best to have a mechanic look at your vehicle when the engine is making noise. You want to rule out anything significant that requires immediate attention. For example, you might need a rod bearing replacement, which can cost $2,500 or more. If that’s not the case, you have several steps to protect your engine. First, check your fuel octane level and make sure you are using what is recommended by the manufacturer. Secondly, use an additive to get rid of the carbon deposits and prevent buildup. Finally, you want to make sure that you change your spark plugs as recommended.


People Also Ask (FAQs)

How much will it cost to replace rod bearing components?

There’s no way to give an exact estimate as every car engine has different parts and a cost associated with it. The reality is that it is very expensive to repair engine components such as the rod bearings. It could easily cost you thousands of dollars, but only a qualified mechanic would be able to provide an accurate price.

What happens if engine sounds are ignored?

If you ignore the warning signs that something is wrong with your engine, you might face costly repairs. If the sounds are just a result of buildup, you can fix this with an additive before the components become damaged. A low-cost bottle could prevent you from spending countless dollars on engine repair.

How do I eliminate knocking engine?

The best engine knocking fix includes using a high-quality oil additive. With the right solution, you are guaranteed that your engine runs at its best and is protected from further wear.

How often should I change engine oil?

Because each vehicle is different, you need to check your owner’s manual. For the most part, mechanics often suggest changing your oil every 3,000 to 15,000 miles, depending on the type of oil in your motor.

What does a knocking engine sound like?

An engine knock often sounds like pinging or tapping. It can become more prevalent as you accelerate.

Can knocking engine cause damage?

If you ignore the buildup in your engine and allow it to continue, it’s likely that the motor will eventually experience permanent damage.


Conclusion

For most engines, we recommend using LUCAS LUC10013 to reduce the dreaded engine knocking. It has a reasonable cost and seems to work the best. Just look at those reviews! If you want to protect your vehicle’s engine and reduce the change of serious repairs, you owe it to your automobile to dump an additive in it.

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