7 Best Fuel Injector Cleaners of 2021

by Joshua Thomas

With every passing day, the fuel injector loses its smoothness and creates problems while driving. And in most instances, it is often a result of clogging as minute particles from the fuel and carbon deposit accumulate over time.

However, the good news is that cleaning it is super easy as you only need to have the best fuel injector cleaner.

The fuel injectors are built to take the performance of your car engine to a whole new level. And they do this by removing carbon deposits to keep the system clean for a smoother fuel injection.

A fuel injector increases mileage, deals with leaks in the nozzles, and improves the overall vehicle performance. And it should be used every 1,000 miles on an average to get improved the best results.

Here we are all about helping you choose a good fuel injector for your vehicle, and we do this with in-depth review and a detailed buying guide.


7 Best Fuel Injector Cleaners of 2021
7 Best Fuel Injector Cleaners of 2021

Summary of 7 Best Fuel Injector Cleaners

IMAGE PRODUCT FEATURES
Red Line Complete SI-1 Fuel System Cleaner

1. Red Line RED60103 (Best Overall)

  • Quantity - 15 fluid ounces
  • Reduces octane need by 2 points
  • Concentrated and detergent based
  • Safe for continual use
Chevron Techron Concentrate Plus Fuel System Cleaner

2. Chevron 65740 (Best for Gasoline Engines)

  • Quantity - 20 fluid ounces
  • Excellent for all gasoline engines
  • Restore lost power and improves fuel economy
  • Minimizes cold starts
Lucas 10003 Upper Cylinder Fuel Injector Cleaner

3. Lucas LUC10003 (Best Value for Cash)

  • Quantity - 32 fluid ounces
  • Good value for money
  • Great for passing smog test
  • Ideal for both diesel and gasoline engines
BG 44K Fuel System Cleaner

4. BG 44K (Best Complete System Cleaner)

  • Quantity - 11 fluid ounces
  • Cleans up the entire system
  • Improves drivability
  • Works with all fuel system materials
Royal Purple Max-Clean Fuel System Cleaner

5. Royal Purple 11722 (Best Long-Lasting)

  • Quantity - 20 fluid ounces
  • More long-lasting protection
  • Ideal for both gasoline and diesel engines
  • Prevents stalling, hesitation and rough idling
Liqui Moly 2007 Jectron Gasoline Fuel Injector Cleaner

6. Liqui Moly 2007 (For Improved Performance & Drivability)

  • Quantity - 10 fluid ounces
  • Improves performance and drivability
  • Eliminates starting problems
  • Improves throttle response
Royal Purple 18000 Max Atomizer Fuel Injector Cleaner

7. Royal Purple 18000 (Cheap but Efficient)

  • Quantity - 6 fluid ounces
  • Highly affordable but efficient
  • Improves vehicle responsiveness
  • Enhanced power and overall performance

1. Red Line RED60103 - Best Overall

Red Line Complete SI-1 Fuel System Cleaner
Red Line Complete SI-1 Fuel System Cleaner
  • Compatible: Both Gasoline and Diesel
  • Cleanup: 30 gallons

Red Line is a top notch fuel additive made to take care of your vehicle. It is a concentrated and detergent based fuel additive that effectively cleans the valves, injectors, carburetors, and chamber deposits.

Also, it contains synthetic upper cylinder lubricant which is safe to use for your cars. It has the potential to clean nearly 100 percent in a single treatment so if you use it frequently you can go longer between treatments.

Moreover, this fuel injector cleaner is a perfect choice as it reduces need for octane by up to two points and one bottle keeps the vehicle in good shape for many miles

While the fuel economy might not increase very significantly when using this fuel additive it still makes up for this with many other

Pros

  • Reduces octane need by up to 2 points
  • Concentrated and detergent based
  • Cleans the injectors, valves and combustion chambers
  • Safe for continual use

Cons

  • No increase in fuel economy

2. Chevron 65740 - Best for Gasoline Engines

Chevron Techron Concentrate Plus Fuel System Cleaner
Chevron Techron Concentrate Plus Fuel System Cleaner
  • Compatible: Gasoline

Chevron Techron has been manufactured to clean and protect the entire fuel system. It is capable of dealing with carburetors, intake valves, fuel injectors and combustion chambers.

This system cleaner is an effective solution that suits both old and new engine needs. And by getting rid of deposits, it also increases the mileage.

This fuel injector will also restore lost fuel economy, lost power and fuel gauge sensor operation to give excellent performance.

Moreover, this cleaner system improves cold start problem and fuel stability for up to one year. Also, it reduces engine surge, rough idle, spark plus fouling and hesitation to improve the vehicle's overall performance.

Besides regular vehicles, you can also use it on motorcycles, boats, water craft, dirt bikes, RVs, ATVs and even lawnmowers.

For the best results, you need to regularly use this fuel additive as it is not a one-time solution, but you will not find any fuel injector cleaner, so this should not be a deal-breaker.

Pros

  • Reduces engine surge, spark plus fouling and rough idle
  • Restores fuel economy and power
  • Improves cold start problem
  • Safe for regular and continual use

Cons

  • Requires regular use for maximum effectiveness

3. Lucas LUC10003 - Best Value for Cash

Lucas 10003 Upper Cylinder Fuel Injector Cleaner
Lucas 10003 Upper Cylinder Fuel Injector Cleaner
  • Compatible: Both Gasoline and Diesel
  • Cleanup: 100 gallons

This top-rated fuel injector cleaner by Lucas which is good for both diesel and gasoline engines. Besides fuel injectors, it also works well for carburetors.

This cleaner gives your fuel system everything in right quantity to keep it up and running.

With a blend of super slick oils and additives containing high detergent, this fuel cleaner makes the engine operate efficiently. It burns the fuel properly so the consumption is less and power increases.

Plus, if you are concerned about passing smog tests, this cleaner is the right pick. Since it is used in vehicles requiring leaded fuel, it takes care of harmful emissions as well.

Other than that, it is effective in neutralizing the harmful effects caused by low sulphur diesel fuel. And because it cleans up to 100 gallons, it will give you the best value for cash given its smaller price tag.

Gas mileage might not increase significantly when using this fuel injector, but it improves the vehicle's overall performance.

Pros

  • Great for passing smog tests
  • Good value for money
  • Improves overall engine efficiency
  • Works for both gas and diesel engines

Cons

  • No significant mileage increase

4. BG 44K - Best Complete System Cleaner

BG 44K Fuel System Cleaner
BG 44K Fuel System Cleaner
  • Compatible: Gasoline
  • Cleanup: 20 gallons

BG 44K brings you this fuel system cleaner to help clean the entire fuel system quickly and efficiently.

Moreover, this fuel system is an effective cleaner when it comes to ports, combustion chambers, fuel injectors and intake valves.

Also, this cleaner increases power output as well as reduces problems like stumble, stalling, engine surge, power loss and hesitation. It works well with alcohol blended fuels and common fuel additives.

This product improves driveability and delivers quick clean up of corrosive deposits present in the fuel sending unit and coked fuel injectors. It is alcohol free and oxygen sensor safe.

For an 11-ounce bottle, this fuel additive seems a little pricier, but it is worth it for a premium quality product. And even with no significant mileage increase it is still one of the best fuel additives out there, thanks to the improved overall engine performance.

Pros

  • Improves driveability
  • Restores engine performance
  • Works with all fuel system materials
  • Increases power output

Cons

  • A little pricier
  • Doesn't improve mileage

5. Royal Purple 11722 - Best Long-Lasting Fuel Injector Cleaner

Royal Purple Max-Clean Fuel System Cleaner
Royal Purple Max-Clean Fuel System Cleaner
  • Compatible: Both Gasoline and Diesel
  • Cleanup: 20 gallons

This Royal Purple product is a top quality additive that works both for gasoline and diesel engines. And it is well known to maximize the performance of your fuel system.

It enhances fuel economy whilst restoring horsepower of the vehicle. Also, it contains high performance synthetic ingredients to clean the entire fuel system to deliver exceptional results.

Moreover, this product deeply penetrates into the fuel system to effectively clean the injectors, combustion chambers, intake valves and carburetor.

Plus, it takes care of engine knocking and pinging while also preventing common problems like hesitation, stalling and rough idling. And it meets EPA/CARB compliance standards.

You can use it for both 4 cycle and 2 cycle engines and it will also come in handy for stabilizing the fuel during storage.

Price is probably its only significant shortcoming but for 20 ounces of product, it is still fairly priced.

Pros

  • Works for both gasoline and diesel
  • Removes deposits from the engine
  • Suitable for both 4 cycle and 2 cycle engines
  • Prevents stalling, rough idling and hesitation

Cons

  • Relatively pricier

6. Liqui Moly 2007 - For Improved Performance and Drivability

Liqui Moly 2007 Jectron Gasoline Fuel Injector Cleaner
Liqui Moly 2007 Jectron Gasoline Fuel Injector Cleaner
  • Compatible: Gasoline
  • Cleanup: 18 gallons

Liqui Moly 2007 is a good fuel injector cleaner that will help improve your vehicle's overall performance and also make it more environment-friendly by minimizing emissions.

This cleaner makes sure to remove carbon deposits, and clean fuel pipe, inlet valves, fuel distributors, injection valve deposits efficiently.

By cleaning the contaminated petrol injection systems, it offers effortless starting, low pollution, smoother idling, no lean surging, good throttle response and environment friendly combustion.

Moreover, it is helpful in restoring the engine to its original performance by promoting accurate injector dosing and fuel atomization. The fuel consumption is also reduced and if you have an engine with catalytic converter, this is still a safe product to use.

For diesel engines this fuel additive might not work well but for gasoline ones, it is perfect. Also, there is no much product on the bottle, but it still goes a long way.

Pros

  • Eliminates starting problems
  • Minimizes vehicle emission
  • Removes carbon deposits from the fuel pipe and valves
  • Improves throttle response

Cons

  • Not suitable for diesel engines
  • The bottle size is quite small

7. Royal Purple 18000 - Cheap but Efficient

Royal Purple 18000 Max Atomizer Fuel Injector Cleaner
Royal Purple 18000 Max Atomizer Fuel Injector Cleaner
  • Compatible: Both Gasoline and Diesel
  • Cleanup: 10 gallons

The Royal Purple 18000 is one of the cheapest options on our fuel injectors review, but it is still highly efficient in cleaning.

It is highly concentrated and fully synthetic product that is designed to deliver high performance. And it will be effective in restoring fuel economy and maximizing horsepower.

Also, it is works wonders for the direct injection engines and will be ideal for use on both gasoline and diesel engines. If you want to clean clogged and coked injectors, this will work seamlessly.

And as its name suggests, this cleaner is loaded with highly concentrated polyether amine detergents to restore injector flow. Plus, it atomizes fuel and injector spray patterns.

Furthermore, this fuel cleaner is well known to enhance performance and power as well as promises easier starts. What's more, it stabilizes ethanol which can cause harm to the engine.

And although the gas mileage will not increase significantly, you can be confident that your vehicle's engine will run more efficiently.

Pros

  • Cleans clogged and coked injectors
  • Improves vehicle responsiveness
  • Enhances power and performance
  • Works on both gasoline and diesel engines

Cons

  • Does not improve gas mileage

How to Buy the Best Fuel Injector Cleaner

How To Buy The Best Fuel Injector Cleaners
How To Buy The Best Fuel Injector Cleaners

While buying a fuel injector, you need to determine how efficient it is before spending your cash on it. As there are different types of car engines, you also need to make sure you get the right fuel system cleaner for your specific engine.

1. Compatibility

By compatibility, we mean the fuel tank compatibility. If you own a diesel engine car, you need a fuel cleaner made for diesel tank and the same goes for gasoline engines.

To know which injector cleaner is compatible for your car, you can ask your mechanic if you are not certain what to buy.

Also before you buy, know about your car's engine, condition and how old it is because some fuel cleaners are not suitable for old cars.

If your car is too old, you need a powerful cleaner as the mild one will not perform as you expect. This is because the carbon deposit is thicker and hence tougher.

2. Ease of use

The fuel cleaner must be easy to use. And the ease of use encompasses everything from the ease of opening bottle to how easy it is to pour the product from it.

Also clear directions on the proportion of the cleaner to the amount of fuels that it can clean will ensure you have an easier time.

3. Budget

Your budget matters the most as there are different cleaners marked at different prices.

Basically, the quality cleaners cost somewhere around $15 and as the features improves, the price also goes up.

The quantity of the fuel injector on the container also determines the price and generally the more the fuel injector in the bottle the pricier it will be.

4. Brand

Brand name is always a significant factor to consider when buying anything for your vehicle. Whenever you buy any fuel injector cleaner, you should never invest in something from an unknown brand as you are more likely to end up with something substandard.

But, you still need to check the authenticity, goodwill, reputation and testimonials of the particular brand before buying.

Also, note that some brands focus on improving fuel consumption while some claim to clean the fuel pipes to deliver a smooth ride, so you need to know what you are looking for.

Some of the best fuel injector brands out there include Red Line, Chevron, STP and Royal Purple.

Conclusion

A car's fuel injector needs to be a perfect shape to offer smooth driving and the best way to ensure this is by using a good fuel injector cleaner to combat the carbon deposits accumulated on it.

And by considering factors like compatibility, budget and brand, choosing the best fuel injector cleaner should be a more effortless task.

Also, with our review above, you should now have an idea of where to start your shopping as we provide top-notch recommendations from leading brands.

About Joshua Thomas

Joshua Thomas just simply loves cars and willing to work on them whenever there's chance... sometimes for free.

He started CarCareTotal back in 2017 from the advices of total strangers who witnessed his amazing skills in car repairs here and there.

His goal with this creation is to help car owners better learn how to maintain and repair their cars; as such, the site would cover alot of areas: troubleshooting, product recommendations, tips & tricks.

Joshua received Bachelor of Science in Mechanical Engineering at San Diego State University.

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