The Best Fuel System Cleaners For 2023

Most car owners and drivers are not aware of the contaminants and dirt that gets accumulated in the fuel system. The contaminants don’t take long to circulate. You will be surprised to see the germs and dirt collected in your fuel system over time. One of the common reasons why the fuel system of your car gets clogged is the impurities and unnecessary contaminants accumulating in the system.

You need fuel system cleaners to get rid of these contaminants and keep your vehicle clean and safe. If you are looking for the best fuel system cleaner for your car, you have come to the right place. In this post, we have compiled a list of the top 10 fuel system cleaners for four-wheelers. Take a look at the options mentioned below and choose the cleaner that fits your preference and budget.

What Are The Fuel System Cleaners?

The accumulated debris impacts the efficiency of your fuel system. Almost all cars, regardless of their brands, are exposed to these contaminants at some point. If you don’t pay attention to the fuel system of your vehicle, chances are these small issues can block your fuel system. This can also lead to a variety of car issues, such as the inefficient fuel system. In most cases, your car will consume a significant amount of fuel.

Fortunately, there is a way you can avoid this issue. A fuel cleaner can be used to eliminate all sorts of contaminants accumulated in your fuel system effortlessly. The regular fuel cleaning can boost your engine’s efficiency. Whether you use an outdated model or a brand-new vehicle, a fuel system cleaner can help eliminate impurities and unnecessary contaminants swirling around the fuel system.

Let’s dive deep into the 10 best fuel system cleaners you must purchase for your car.

1. Lucas Oil 10512 Fuel System Deep Cleaner

The specialty of this product is that it offers deep cleaning just like it claims. Lucas Oil 10512 deep cleaning product is known for removing the carbon buildup and contaminants from a number of internal components effortlessly. Safety is not going to be your concern with this strong fuel system cleaner. It doesn’t contain kerosene and harmful compounds that can damage your engine.

The areas this cleaner covers are intake ports, fuel injectors, cylinder heads, valves, piston tops, etc. Even if you use cheap and low-quality gasoline, Lucas Oil 10512 Fuel System Deep Cleaner will keep your system in good condition. The product avoids engine knocking and pinging that’s quite common with the low-octane fuel.

Deep Cleaning

Once it starts to dislodge the stubborn particles, you will notice the results. It helps you enjoy a smoother and longer ride. Besides that, the product prevents nitrous oxide emissions.

Rest assured that you won’t have to deal with the noise, odor, and emission after the application. Now that Lucas Oil 10512 treats multiple components located around the fuel system, it leaves no deposits or carbon buildup on the surface of your car’s internal components.

Bottle Size And Design

With all the areas getting cleaned thoroughly, you will notice an improvement in the fuel economy and overall driving experience. You will no longer need to spend extra on the excess fuel consumption due to the carbon buildup. The company offers a 16-ounce bottle that can be used for cleaning up to 30 gallons. This bottle contains a reasonable amount of cleaner.

The main drawback of the product is that it takes time to show the results.


  • Eliminates stubborn deposits
  • Covers most of the internal components
  • Cleans the whole combustion chamber
  • Improves MPG performance
  • Clean up to 30 gallons
  • Free of diesel fuel, kerosene, and harmful chemicals

The Pros

  • Offers deep cleaning
  • Treat multiple components
  • Prevents emission, sound, and odor
  • Improves fuel efficiency
  • Compatible with older engines
  • Offers durable results

The Cons

  • Takes time to produce results

2. ACDelco 88865595 Fuel System Cleaner

If you are looking for an effective and strong fuel system cleaner for a thorough cleaning, then the ACDelco 88865595 product is your ultimate choice. This solution has the potential to clean all the internal components of your vehicle, maximizing the fuel efficiency and removing the buildup of contaminants and carbon deposits.

Improved Fuel Efficiency

The formula is especially used for cleaning injectors, combustion chambers, and intake valves. The product cleans the fuel system thoroughly, ensuring that no deposit or residue is left in the tank and other components.

ACDelco 88865595 Fuel System Cleaner is compatible with older fuel systems. You can even use it to soften the hard and stubborn deposit and dislodge it from the internal components. Once the buildup is removed from the system, the fuel can travel freely. This is how this fuel cleaning formula improves fuel efficiency and allows you to enjoy a smooth and fast ride.

Thorough Cleaning

ACDelco 88865595 Fuel System Cleaner can also be used as a stabilizer that keeps your engine and overall fuel system in tip-top condition even if it hasn’t been used for a while. By cleaning the intake valves and combustion chambers, this strong cleaning solution allows you to start your engine easily. Overall, the ACDelco fuel system cleaner allows you to enjoy a comfortable and smooth ride. Not only does it improve the acceleration performance, but this formula can make your rides a whole lot comfortable.

The only drawback is its small bottle that allows you to clean a single gallon. This won’t be enough if you need the best fuel performance. If you need to clean the fuel tank and internal components frequently, then you will have to buy 3-4 ACDelco 88865595 bottles.


  • Offers deep cleaning
  • Dislodge all particles
  • 12-ounce bottle
  • Powerful formula
  • Maximize fuel efficiency

The Pros

  • Clean multiple internal components
  • Stabilize the engine
  • Increases the speed
  • Improves fuel efficiency
  • Easy to apply
  • Prevents carbon buildup

The Cons

  • The solution is not sufficient for multiple application

3. Liqui Moly 2007 Jectron

Liqui Moly 2007 Jectron is known for its excellent cleaning qualities. This injector cum cleaner can eliminate all sorts of impurities and debris accumulated on the car’s internal components and fuel system in just one application. If you are looking for a solution to the engine issues, such as the vibration and chatter sound, then this cleaning product can make a perfect fit for your vehicle.

Improved Fuel Efficiency

Liqui Moly 2007 Jectron is compatible with older and new fuel systems. The company claims that the product will produce instant results. All you got to do is apply it appropriately. In fact, it is specially designed for older engines.

The product is available in a 300ml container. This fuel system cleaner covers fuel injector, fuel pipes, inlet valves, and other internal components. In addition to offering a thorough cleaning, Liqui Moly 2007 Jectron is known for preventing emission. This eco-friendly product can help you retain the car’s performance.

A Comfortable Ride

By cleaning the combustion chambers and fuel injectors, it allows fuel to pass through the internal components easily. This enables the car owners to enjoy a hassle-free ride. It also helps improve the acceleration as well as fuel economy. The best part about this product is its low price. Despite offering deep cleaning, this fuel system cleaner comes at an affordable price. It prevents carbon buildup.


  • Clean combustion chambers and inlet valves thoroughly
  • Prevents engine issues
  • Facilitate the smooth flow of the fuel
  • Stabilize the engine
  • Remove carbon-buildup

The Pros

  • Improves fuel economy
  • Offers deep cleaning
  • Eco-friendly cleaning formula
  • Reliable and durable
  • Cost-effective solution

The Cons

  • No cons that we know of

4. Chevron Techron 10055 Fuel Injection Cleaner

Designed for all types of engines, Chevron Techron 10055 Fuel Injection Cleaner is the mechanics’ first choice when it comes to a fuel system cleaning application. This product is used for restoring fuel economy and horsepower. The solution contains PEA, which is known for removing the toughest deposits on the internal systems efficiently.

So, even if you have not maintained or serviced your vehicle for a while, you can count on Chevron Techron 10055 Fuel Injection Cleaner for removing all sorts of dirt particles and contaminants seamlessly.

Coming to the drawback, you are going to need to apply Chevron Techron 10055 Fuel Injection Cleaner every 1000 miles. This means you need to use this cleaner frequently to get the desired results. It is one of the cheapest fuel system cleaning formulas on the market.


  • Restore acceleration and fuel economy
  • A safe cleaning formula
  • Need to be used every 1000 miles
  • Prevents gas-line freeze
  • Contains PEA
  • Compatible with different vehicles

The Pros

  • Offers a better fuel economy
  • Increases horsepower
  • Easy application
  • Affordable
  • Compatible with older engines

The Cons

  • You need to apply it multiple times for the best results

5. Hot Shot Everyday Diesel Treatment

You only need one treatment of the Hot Shot Everyday Diesel fuel system cleaner to restore the fuel economy of your vehicle. This product is designed to clean the internal components of your car and improve fuel economy. Used specifically for the diesel engines, Hot Shot Everyday Diesel Treatment keeps your fuel tank clean and free of contaminants.

You don’t need servicing and maintenance of the car given that you pour the solution into the fuel tank efficiently. The product is completely safe and ash-less. It prevents emission, engine vibration, and unusual odor. Rest assured that the product will have no adverse effect on your vehicle or the internal components.

Overall, the formula improves the car performance and internal components. It has also proven to be a great solution to corrosion and rust. It prevents the buildup of deposits and contaminants on the metal surfaces, thus reducing the risk of corrosion. The USP of the brand is its ability to clean up to 400 gallons.


  • It disperses moisture
  • Prevents corrosion
  • Offers better fuel economy
  • Cleans the fuel system and internal components

The Pros

  • Prevents carbon buildup
  • Instant results
  • Improved fuel performance
  • Compatible with diesel engines
  • Stabilizes engine

The Cons

  • Not compatible with a gasoline engine

6. Red Line oil Complete SI-1 60103 Fuel System Cleaner

The carbon buildup and deposits are the common reasons for a poor-performing vehicle. One way to reduce the emission and improve fuel economy is by applying the Red Line Oil 60103 fuel system cleaner to the internal components. This cleaning product can be used for cleaning fuel injectors, valves, and combustion chambers.

Red Line oil cleaner is recommended for older fuel systems. This formula contains PEA, which happens to be the strongest compound for fuel tank cleaning. It is capable of eliminating even the harshest deposits from the internal parts effortlessly.

Improve Fuel Efficiency

You only need to apply it once to get the best results. The detergent can dislodge all kinds of impurities and debris inside the fuel system. With the Red Line Oil Fuel System Cleaner, you don’t need a fuel injector that contains a high level of octane.

This formula improves your vehicle performance and allows you to enjoy a smooth ride. It goes without saying that this advanced PEA-rich solution can boost fuel efficiency, saving you hundreds of dollars on excess fuel consumption.

After the successful application, you will not have to refill the fuel tank frequently. In fact, you can cover a longer distance with the same amount of fuel. This fuel system cleaner is safe for your engine and fuel system. However, the company sells a 15-ounce of Red Line oil Complete SI-1 60103 Fuel System Cleaner. This means you can use this product to clean only 20 liters.


  • Contains a combo of the high and low temp detergents
  • PEA-rich formula
  • Compatible with oxygenated fuel
  • Cleans multiple components
  • Clean up to 20 liters

The Pros

  • An ideal option for older fuel systems
  • Clean heavy deposits
  • Improves fuel efficiency
  • Offers quick results
  • Improve overall car performance

The Cons

  • It can clean only 20 liters

7. Gumout 510014 Regane Complete

Another effective fuel system cleaner containing PEA is Gumout 510014 Regane Complete. The PEA compound in its formula guarantees the removal of even the harshest and most stubborn carbon deposits from the internal system. One interesting quality that makes it stand out from the standard cleaning detergents is its ability to prevent future carbon buildup.

Once you have applied the cleaner to the internal system, rest assured that the internal components and fuel system will not experience the accumulation of contaminants for a while.

A Deep Cleaner

The best quality of this product is its lubrication and conditioning properties. Gumout 510014 Regane Complete isn’t a regular cleaner. In addition to removing the carbon deposits, it conditions and lubricates your vehicle. Gumout 510014 Regane Complete is a cost-effective solution to poor fuel performance, emission, and other such issues.

Available at a reasonable price, you only need to apply it once. Rest assured the solution will keep your car’s fuel system from attracting contaminants and debris. It’s safe to say that Gumout 510014 Regane Complete offers deep cleaning as it covers multiple components. This fuel system cleaner removes carbon deposits from the intake valves, injectors, combustion chambers, and cylinder heads.

Improved Horsepower

The driving performance and fuel efficiency will be improved almost instantly after the application. The formula improves the horsepower and overall efficiency of the engine, allowing you to enjoy a great and comfortable ride. You don’t need to fill your fuel tank frequently given that you have poured this PEA solution appropriately.


  • Improves fuel economy
  • Prevents carbon buildup
  • Avoid emissions
  • Cleans multiple internal components
  • 6 ounces of fluid

The Pros

  • Improve fuel efficiency
  • Lubricates and conditions the internal components
  • Remove carbon deposits
  • Offers deep cleaning
  • Cost-effective formula
  • Prevents corrosion

The Cons

  • Bottleneck isn’t compatible with all fuel systems

8. Royal Purple 11722 Max-cleaner

The USP of the brand is its effective formula that can clean the gasoline as well as diesel engines thoroughly. Whether you run a diesel or gas engine, Royal Purple 11722 max-cleaner is all you need to deep clean your fuel system. So, if you have been noticing a poor fuel performance and issues in the engine and fuel system, then give this cleaner cum stabilizer a try. This 2-in-1 product keeps your car engine stable even if you have not driven it for a while.

It is an ideal product to add to your fuel. Royal Purple 11722 Max-cleaner can boost horsepower up to 2.6%. This helps you enjoy a smooth and fast ride. You can notice the results after one treatment. You will be surprised to notice how your car doesn’t need as much fuel as it needed before the Royal Purple 11722 Max-cleaner application. If you drive your car regularly, then this cleaner and stabilizer is worth a shot.

The only part we did not like about this product is that it needs to be applied frequently. While the results are visible after each application, it doesn’t last long. The 12-ounce bottle can be used to clean up to 20 gallons, which is not that impressive.


  • Stabilizer cum cleaner
  • Clean up to 20 gallons
  • 12-ounce bottle
  • Increase fuel efficiency by 2.3 percent
  • Prevent the carbon buildup
  • Clean the entire fuel system efficiently

The Pros

  • Improves horsepower
  • Offers deep cleaning
  • Offers better fuel efficiency
  • Stabilize your engine
  • Affordable price

The Cons

  • It needs to be applied frequently

9. Motor MK – 10351 Catalytic and Emission Control Fuel System Cleaner

Designed for the exhaust system as well as the Catalytic converter, Motor MK – 10351 fuel system cleaner keeps the internal components of your vehicle safe from corrosion and carbon buildup. This 2-in-1 cleaning detergent is not only used for removing the carbon buildup from the fuel system, but it can offer the best protection to the converter.

One bottle of Motor MK – 10351 fuel system cleaner can be used for cleaning up to 16 gallons of fuel. The results of this product last for 6 months and 7000 miles. This means you don’t need to clean the fuel or use any other fuel maintenance product for 6 months following the application of Motor MK – 10351. The cleaning formula is safe for all types of gasoline engines.


  • Protect catalytic converters
  • Clean the fuel components
  • Last for 7000 miles
  • A safe product for all gas engines
  • Prevent carbon buildup

The Pros

  • Improves fuel economy
  • Comfortable and smooth ride
  • Long-lasting results
  • Used for converters

The Cons

  • Expensive

10. Gumout 510016 All-in-one Fuel System Cleaner

Many factors are responsible for poor fuel performance. However, it is mainly affected by the carbon deposits on the metal surfaces. Gumout 510016 All-in-one Fuel System Cleaner contains PEA formula that’s considered to be the strongest solution to all kinds of contaminants and dirt particles. This formula can condition the fuel system, thus extending its life. Additionally, it has proven to be a perfect solution to corrosion and premature engine wear signs.

The product cleans cylinder heads, inlet valves, combustion chamber, and fuel injectors. It can also be used for supercharged vehicles. You are going to need to re-apply the Gumout 510016 All-in-one Fuel System Cleaner every 3000 miles. The application is quite simple. Pour the solution into an empty gas tank and fill the tank with 18-35 gallons of gas.


  • PEA formula
  • Offers conditioning
  • Prevents friction, corrosion, premature wear, and carbon buildup
  • Offers deep cleaning
  • Need to be applied every 3000 miles

The Pros

  • Improves fuel economy
  • Clean injectors and other internal components
  • Removes the toughest stains and carbon deposits
  • Effective
  • Easy application

The Cons

  • Expensive

Safety Measures To Consider When Applying The Cleaner

The application of the fuel system cleaner seems quite simple. You only need to open the container and pour the detergent into the fuel tank. However, you must take precautions when using fuel injectors or cleaners. They contain extremely powerful compounds. It must not spill on your vehicle’s exteriors. Put on a pair of gloves when pouring the cleaner.

Another important thing to check is the amount of gas in the tank. You can’t pour the solution in a full or half-filled tank. You need to ensure that the tank is almost empty or has less than 1 gallon of gas before diluting the solution. Also, check the label of the product to know the amount of cleaner you need to dilute. You must also check the owner’s manual to know the size of the fuel tank and the amount of cleaner you can pour in it.

Once you have reconnected the injectors, drive your car in reverse to see if the problem persists. If you are sure you have installed the fuel components appropriately after the application, then you will not face any issue. However, if you experience the same problem, then it is a sign you need to replace your fuel pump.

Tips For Choosing The Best Fuel System Cleaner For Your Car

Do you have to struggle to start the engine? If the engine doesn’t start it one or two attempts, chances are the fuel injectors are clogged due to the carbon buildup. Clogged injectors can cause other serious issues, such as low fuel economy. The sooner you detect the issue, the lesser you will have to pay for your vehicle maintenance.

Now, before you purchase the fuel system cleaner, you need to consider a few crucial factors. Not all cleaners have the same quality and efficiency. Some are better than others. The quality of the fuel system cleaner largely depends on the ingredients they contain. Let’s take a look at some important factors you must take into consideration when buying the fuel system cleaner.

Deep Cleaning

Fuel inefficiency can lead to many issues. If you don’t fix the fuel system soon, the impurities in the system will cause serious problems, such as the constant knocking and pinging sound. If that’s the case, you are going to need to invest in a strong cleaner. Fuel system cleaner can also be used for the outdated models that have not been cleaned, serviced, and maintained properly. So, a simple way to boost the efficiency of your older vehicle is by cleaning the fuel system with a powerful cleaner.

If you are facing serious issues, consider investing in a cleaner that offers deep cleaning. Basically, your car needs more cleaning power if it has accumulated contaminants over the past few years. Make sure to check the label of the product before making a purchase. The main difference between the normal and deep cleaners is that the latter comes packed with strong compounds and detergents that can remove the stubborn particles accumulated on the surface of the fuel system. These cleaners are used to dislodge the debris and stains. However, deep cleaning isn’t necessary if you invest in regular car maintenance.

Fuel Efficiency

The major issue you face with the unclean fuel system is the poor functioning of the fuel and overall vehicle. The inefficient fuel system won’t let you enjoy a smooth ride. Now, improving your fuel efficiency does not need servicing or heavy repairs. All you need is a high-quality fuel system cleaner to get the impurities and contaminants out. Once you have dislodged the stubborn particles from your fuel system, you will be able to enjoy smoother and longer rides without using more fuel than required.

Some cleaning detergents feature a label that reads “Improve fuel efficiency”. Of course, every fuel system cleaner can eliminate unnecessary deposits from the fuel system and enhance its efficiency. However, the products that feature the special fuel efficiency label can clean the overall system instead of a few basic components. That being said, these detergents are better and effective than the regular cleaning detergents.

Condition And Lubricate The Fuel System

Just removing the deposits in the internal system is not enough, especially if you don’t lubricate and condition your car regularly. You need to ensure that these deposits do not start to accumulate again on the surface. If you want the internal components of your vehicle to stay in a tip-top condition for a while, then consider buying a cleaning product that can condition and lubricate your vehicle’s internal system.

Lubrication will keep the fuel system from deposits and carbon build-up. The contaminants cannot adhere to the lubricated and conditioned surface. Besides that, regular conditioning and lubrication keep the internal components from corrosion. This small investment can save you hundreds of bucks on regular repair and maintenance.

Bottle Size And Design

One of the most important yet often neglected factors in the fuel system cleaner is the bottle design and its size. The reason we suggest you consider the bottle design is that the fuel cleaning detergent contains strong compounds. You need to be very careful when injecting the cleaner into the fuel system. It must not spill on your vehicle’s exterior and on your clothes. The simple bottle design will allow you to place the cleaner directly into the fuel tank.

Now, the size of the bottle is also an important factor. The manufacturer ships this product with the information concerning the total amount of cleaning detergent you need to use to clean the fuel system. If you use a small car and need basic maintenance, the size of the bottle won’t be a big issue for you.

For those who have a turbocharged vehicle, it is extremely important to take a closer look at the size and design of the bottle before making a purchase. The best product will enable users to inject only a small amount of cleaning compound for a larger number of gallons. The lesser the cleaning your car’s fuel system needs, the longer this bottle will last.

Know The Difference Between Fuel System Cleaner And Injector

The deposits and carbon buildup doesn’t only impact fuel efficiency, but it can damage different internal components of your car in the long run. For example, corrosion and premature wear are quite common in vehicles that are not maintained and conditioned periodically. So, the accumulation of contaminants can affect many components (apart from the fuel system). Chances are you must have found the fuel injector products when searching for fuel cleaning detergents. That’s because many people confuse the fuel system cleaner with the injector and vice versa.

However, injector and cleaner are different. While they are both used to clean the fuel system and boost its efficiency, the injector is known for cleaning the fuel injectors only. Fuel cleaners, on the other hand, can be used for deep cleaning. They can clean all the internal components of your vehicle efficiently.

Ingredients Found In The Fuel System Cleaner

You need PIB or Polyisobutene for the basic maintenance of the fuel system. This chemical compound is specifically used for removing the carbon buildup from the internal components. It is recommended for the owners of the brand-new vehicle and those who have replaced the fuel system recently. Remember that PIB isn’t an effective option for dislodging the stubborn particles that have been accumulated on the surface of your car’s internal components over the past few years.

Another compound, i.e. PIBA or Polyisobutene Amine is a powerful ingredient found in the fuel system cleaner. It is used to remove the hard deposits in the fuel system effortlessly. It is capable of cleaning many internal parts of your vehicle. If you use it properly, you are not going to need maintenance and fuel system repairing. Still, PIBA is used for moderate cleaning only. For those who need the strongest cleaner for their outdated cars and fuel systems, the product containing polyetheramine is recommended. Even the car that’s in a really bad condition can be cleaned and repaired with this compound.


Fuel system cleaners are designed for improving fuel efficiency.  The main purpose of buying a fuel injector or cleaner is to remove the stubborn particles accumulated on the surface of the internal components. The fuel system cleaners we have mentioned on this list are cost-effective and modern solutions to poor fuel performance and engine issues.

  1. Can I Use Fuel System Cleaners for Fixing Leaks?

    No, cleaners cannot fix the leaks unless the cause of the leak is the buildup of contaminants in the internal components. You must hire a professional mechanic or take your vehicle to the automobile repair shop. You can also use oil additives to fix the leaks. The fuel system cleaner can only help you detect the leak.

  2. How Often Do I Need to Clean the Fuel System Injectors?

    This depends on a number of factors, such as your car model, manufacturer’s instructions, the fuel injector, and the fuel system cleaner you use. In general, new cars don’t need regular fuel cleaning. The older the car gets, the more cleaning it requires.

    As you cover more miles with your vehicle, the fuel system and internal components will start to experience carbon buildup. The engine of your car will also start to lose its efficiency.

    Experts recommend fuel system cleaning once your vehicle has covered 30,000 miles. If you have an older vehicle, then you may need frequent cleaning. How often you need fuel injector cleaning also depends on your goals. If you need a basic cleaning to fix some minor problems in your engine, then consider cleaning the fuel system every 4-6 months.

  3. Can Deposits Affect Driving and Fuel Efficiency?

    Yes, deposits that adhere to the surface of the internal car components can damage your car in multiple ways. The common problems caused by carbon buildup and stubborn deposits in the fuel system are lower mileage, excess fuel consumption, corrosion, hard starts, knocking and pinging sound, and poor acceleration.

  4. Do I Need to Replace the Fuel Injector?

    Engine knock is the common sign you need to replace the fuel injector. Difficulty in starting the engine can also indicate an inefficient fuel performance. Mostly, the fuel system cleaner is all you need to fix the issue. However, if you experience the same issue after the cleaner application, then it is probably time to take your vehicle to a professional mechanic and get the fuel injector replaced.

  5. Can Fuel System Cleaner Prevent Corrosion?

    Now, corrosion occurs when the deposits harden due to improper lubrication and poor maintenance. Some fuel system cleaners can lubricate and condition the fuel system. They remove the debris inside the internal components and prevent corrosion.

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David Rodriguez

David lives in Fort Wayne, Indiana with his wife, three children, and Hugo, his adorable medium-sized dog. For the past 11 years, he has been working for several automotive dealerships in Fort Wayne due to his lifelong passion for cars. He's one of the new authors on CarGuided.