12 Best Fuel Injector Cleaners of 2021

1. Red Line RED60103 – Best Overall

• 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

• 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.

• 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.

• 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. 

• 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.

• 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.

• 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.

• Compatible: Gasoline
• Cleanup: 21 gallons

STP makes this fuel injector cleaner to not only improve the vehicle's performance but also give users an easier time as it comes in an easy pour bottle.

This fuel injector cleaner is compatible with gasoline engines and improves the engine performance by removing harmful deposits like gum, carbon and varnish on the fuel injectors.

Moreover, it is helpful in unclogging dirty fuel injectors which further restores performance. It also restores acceleration and power while saving or optimizing gas consumption.

As you may know, lack of maintenance can lead to rough idling and hard starts, this fuel injector makes sure to deal with that appropriately.

Additionally, you can expect good results owing to the fact that it is made with jet fuel which is a high quality carrier of active ingredients.

Because this fuel injector cleaner still contains some kerosene, it might not be ideal for some engines, but the good news is that it contains almost insignificant percentages and should hence be safe for most engines.

Lucas Oil brings this deep clean fuel cleaner to reduce harmful nitrous oxide emissions. This fuel cleaner is a good choice if you don’t have many requirements to keep the car engine running.

This one is a mild fuel cleaner that contains additive package and specific carrier fluid. It doesn’t have any type of kerosene, diesel fuel or other harmful substances that can hamper the performance of your engine.

Moreover, it eliminates engine knocking and pinging whilst preventing the need for higher octane fuel and hence making it a good fuel injector cleaner for almost any engine.

Also, it promises to deeply cleanse the combustion chamber and entire fuel system in order to lend great performance as well as increase mileage.

Because the use ratios gallons are not included you can easily put too much or less of the product per gallon of fuel. However, this is a small problem to deal with by consulting the manufacturer.

• Compatible: Gasoline
• Cleanup: 21 gallons

Gumout brings you this high mileage fuel injector which has been specially formulated to increase air flow to increase engine power.

This fuel injector cleaner removes tough carbon deposits from the engines and you can expect good engine performance and fuel economy at an affordable price.

Moreover, it helps in easy start ups of cold engines while also improving throttle response. And you can use it in supercharged and turbocharged vehicles to avail maximum benefits.

Plus, it is perfect in improving gas mileage and decreasing hydrocarbon and carbon monoxide emissions. For best results, use it every 3000 miles.

This fuel injector cleaner prevents carbon buildup on intake valves, ports and fuel injectors in an efficient way. It also reduces engine vibration when the car is standing idle.

If you have a very rough engine, this fuel injector might not make it smooth enough but it still improves the engine's overall performance greatly.

• Compatible: Gasoline
• Cleanup: 35 gallons

This 5-in-1 cleaner by STP is manufactured with advanced cleaning technology to ensure superior fuel system cleanup and to make it one of the best complete fuel system cleaners.

Since it is formulated specially to save gas, restore peak performance and reduce friction by providing enough lubrication to the entire fuel system, it keeps fuel fresh even during storage.

Moreover, it contains 3 times better cleaning agents to remove harmful intake valve deposits. Plus, it prevents ethanol deposits that can cause harm to the engine and holds back corrosion.

And it will be ideal for modern gasoline engines like hybrid, turbo, and direct inject, including boats, lawnmowers, and motorcycles.

This fuel system cleaner might not improve gas mileage significantly, and it is also a little pricier, but it is still worth trying out.

• Compatible: Gasoline

Chevron Techron 9280 is an efficient fuel injector cleaner that is compatible with gasoline engines. It is a fuel injector cleaner made to clean clogged injectors which further cause loss of power and hesitation.

Since this product helps restore lost fuel economy, it is also safe to use when it comes to keep the injectors clean of deposits.

Moreover, it cleans harmful deposits and dirty carburetors and fuel injected spark ignition engines. Use it every 1000 miles to get utmost performance.

The only downside to this cleaner is not very effective in preventing engine knocking, pinging and running. But it is still safe for oxygen sensors and catalytic converters.