Best Fuel Injector Cleaners

(Reviews & Buying Guide)

The fuel injector cleaner is a solution that allows you to maintain your fuel injectors to increase their lifespan. Indeed, the cost of changing an injector is quite high. Note that the fuel injectors primary role is to supply as much fuel as possible into the cylinder. Thus, when they wear out due to the presence of dirt, the performance of your vehicle decreases over time. Hence it is better to use an effective cleaner to prevent damage to the engine. We have reviewed best fuel injector cleaners available to ease your search effort. An injector cleaner can be used by anyone who wants to keep their car in good condition. If your engine is old, its better to use a high mileage oil as well to enhance its performance.

Best Fuel Injector Cleaners

fuel cleaner

Techron Concentrate Plus is the pride of Chevron and one of the best fuel injector cleaners appreciated by lot of users. This new reference product is specifically designed to remove harmful deposits from injectors, intake and exhaust valves, and combustion chambers. Whether you want to protect your new car, restore the performance of your old car, or simply keep your engine and fuel system clean. Techron Concentrate Plus reliably and safely cleans carbon deposits and normalizes fuel consumption of the engine. Techron Concentrate Plus will gently cleanse light to moderate deposits on all fuel system components, including the fuel pump, fuel line, and check valve.

Techron’s distinguishing technology works as a cleaner for the entire fuel system, not focusing on a single element. The active components of Techron oxidize the deposits causing them to dissolve in the fuel, then be burned in the combustion chamber, and then exit as exhaust gas.

However, the major drawback is that it is designed to use at regular intervals, which means the results are not long-lasting. So it is recommended to use it every 3000 miles or with every oil change.

Key features:

  • Cleans entire fuel system
  • Work on bikes, boat, and ATV engines as well
  • Eliminates spark plug fouling

fuel cleaner

SI-1 Red Line Injector and Valve Cleaner is a powerful package of the most powerful and one of the best fuel injector cleaners available for cleaning petroleum fuel injectors, intake valves, and combustion chambers. Complete SI-1 fuel system detergent can clean injectors to almost 100% efficiency in one treatment. The cleaning effect on injector deposits can raise fuel savings of around 12% or even higher, depending on the condition of the injectors. It is one of the best fuel injector cleaners that cleans all the fuel supply system.

SI-1 also contains detergent and a synthetic cylinder top lubricant that help clean the intake valves, environmental protection valves, combustion chamber deposits, and carburetors. One SI-1 bottle can reduce octane requirements by two numbers. SI-1 also protects the fuel system from rust.

Key features

  • Cleans with 100% efficiency
  • Cleans combustion chamber deposits

Lucas Fuel Treatment is designed for gasoline and diesel engines. The product does not contain alcohol, solvents, kerosene, diesel fuel, or anything that would be useless or harmful to the engine. Polymers have been removed from low sulfur diesel fuels and reformulated gasoline, not because polymers are toxic, but because they are associated with aromatics (vapors) in the fuel. Main lubricants of fuel have been removed, and, therefore, its power has dropped significantly. It replaces those polymers that make the fuel slicker. In fact, the user gets less fuel consumption per mile, which is more than enough to pay for the fuel processing product itself.

Lucas fuel treatment product lubricates rings and cylinder walls to extend service life. It provides more intensive combustion for more power and reduces fuel consumption per mile with fewer emissions. It cleans and lubricates all the essential parts, including valves, pumps, carburetors, injectors, and compression rings. Lucas fuel product is an excellent diesel fuel adjuster. Before heading out to the store with a fuming or dying engine, we suggest adding about half a gallon of the treatment agent to every 100 gallons of fuel. 

Key features:

  • Cleans and lubricates the fuel system
  • Increase potency
  • Increases the life of pumps and injectors

fuel cleaner

LIQUI MOLY 2007 JECTRON injection Cleaner is an extremely useful combination of cleaning and protection additives. It cleans the fuel system at the initial symptoms of contamination that include unstable rpm, abnormal thrust, engine starting issues thus secure itself into the list of best fuel injector cleaners.

It cleans carbon deposits, resins, and deposits of various types. It reduces emissions of harmful substances and also improves fuel efficiency.

Key features:

  • It removes carbon deposits on inlet valves, metering devices, injectors, and other fuel supply devices’ structural elements.
  • It Ensures optimal reception and low fuel consumption due to the precise dosage.
  • It reduces the concentration of harmful substances in exhaust gases.
  • It reduces CO2 emissions.

fuel cleaner

Max Clean is an additive (for both petrol and diesel) of extraordinary power for the total cleaning of any car and motorcycle fuel system. Royal Purple Max-Clean is a synthetic fuel system cleaner for penetrating fuel injectors, carburetors, valves, and combustion chambers to improve fuel economy.

It is a high-performance synthetic cleaner that optimizes the entire fuel system and can be used with maximum safety in petrol and diesel engines. Its versatility placed itself in our best fuel injector cleaners list.

Key features:

  • Cleans entire fuel system
  • Can be used in both gasoline and diesel

Benefits of a fuel injector cleaner

Less Fuel consumption: Removing carbon deposits from your vehicle’s fuel system helps reduce your vehicle’s overall fuel consumption. So the fuel injector cleaners are suitable for the wallet and the environment as well. Also keep in mind that the proper tire pressure also affects the fuel economy so always keep your tires properly inflated.

Performance: An engine covered in deposits does not perform well, which means you will not get the best results. Keeping clean with one of the fuel injector cleaners can help unleash your vehicle’s full potential.

Reduced maintenance costs: Frequent use of injector cleaner will delay the maintenance activities and will save money overall.

Drastic reduction of toxic emissions: In the process of mixing gasoline mist with oxygen in the internal space, the combustion of fuel is improved. Thus, the amount of toxic components emitted during this process is reduced. It is safe not only for the car but also for the environment.


Should I use a fuel injector cleaner?

“Should I use a fuel injector cleaner?” This question comes into every mind, and it is found that regular cleaning can help revitalize your car’s engine. Whether you are a fan of frequent cleaning or want to improve your vehicle’s performance, here are some great options for you.

Why is it necessary to clean the injector?

Carburetor cleaner or throttle valve cleaner are similar agents and will also extend engine life. But it is the injection system that is responsible for the reliable operation of the fuel injector. If the fuel injector is clogged, the engine will absorb petrol primarily in droplets. It not only increases fuel consumption but also leads to intense engine wear. Thus, the fuel injector’s optimum performance provides the desired ratio between oxygen and fuel consumption in the vehicle. As a result, there will be no excess fuel consumption.

When should a fuel injector be cleaned?

Petrol, but above all, diesel is never a clean mixture: various impurities can deposit there, which, in the long run, can dirty the injectors and compromise engine performance. Usually, it is necessary to evaluate a cleaning of the injectors every 20/25 thousand km traveled, practically in correspondence with each service (usually, this is a practice performed by default by the workshops).

How do you know that it’s time to use the fuel injector cleaner? Generally, the symptoms are as follows:

  • Difficulty starting the car
  • Increased fuel consumption
  • Performance decrease
  • Stopping the engine at low speeds
  • Black exhaust gases

Types of fuel injector cleaners

The first thing to consider before purchasing your injector cleaner is the type determined by the combustion mechanism. So you will find a special one for those who come to gasoline and another for diesel; Everyone is different and brings specific cleaning additives.

Keep in mind that a diesel engine’s compression is much greater than that of gasoline, so we shouldn’t be using the same products for both. We can tell you that the variety you will find in the market is vast, so you can get a diesel injector cleaner that will suit your car’s needs.

On the other hand, it is important to know that experts recommend cleaning injectors every 4,000 to 10,000 kilometers, as the accumulation of waste can be greater during this period. It all depends on the behavior of each vehicle and its working environment. There are two main types of cleaners: Solvents and detergents.


The most common type of fuel injector cleaning fluid is a solvent. These products typically use polyether amine to break down carbon composites. Over time, the fuel’s impurities begin to build up in your vehicle’s injector and combustion chamber. Dissolving the deposits into smaller parts will allow them to be thrown out through the exhaust system.


A much less common type is detergent. There is a lot of speculation about whether this helps cleanse your fuel system, and most people think dilution is the best option. Detergents work by activating chemicals that cause carbon deposits to slip out of the fuel system.

What to look for while buying best fuel injector cleaners


Generally speaking, the most important ingredient in a fuel purifier is polyether amine or PEA. It is a primary ingredient that chemically dissolves carbon deposits. Products containing this chemical will cleanse your system for the best performance.


Several factors decide the frequency. The frequency depends on the condition of the vehicle and its fuel system. So how often should a fuel injector cleaner use depend on your engine condition and, most notably, how it reacts to the cleaner fluid. The use of best fuel injector cleaner listed in our review will certainly reduce the frequency to use them.

Driving conditions:

If you live in colder climates or are often stuck in traffic, your car may be exposed to more carbon build-up. These conditions are less favorable for the vehicle’s fuel system and may require more frequent use of cleaners.

Fuel quality:

Another controversial requirement for fuel systems is to use or not use regular gasoline. Ignoring the cost factor, using regular fuel is the worst option in terms of cleanliness. Therefore, if you frequently use cheaper fuel, using a fuel cleaner can significantly improve your driving experience.


In general, the vehicle age does not determine the carbon deposits, but the mileage of the vehicle does. The more kilometers you drive, the more contaminants build-up and need cleaners.

Tips to do effective injector cleaning?

There are various methods to clean the injectors. We recommend to put into practice our approach before its too late for injectors.

Fill up fuel with additives: every petrol station has mixtures already additive with substances that help cleaning the injectors; filling up with these every 5/10 thousand km, you can be pretty sure you have clean injectors and a performing engine. It is the cheapest solution, but not always sufficient to eliminate the problem. Add specific additives for cleaning the injectors to the full tank of petrol.

There are additives for gasoline or diesel that you can easily find in specialized auto parts shops where you will find the best that suits your engine’s characteristics. Using them is very simple: with the tank almost empty, add the additive, then fill up, and you’re done.

Entrust manual cleaning to a trusted mechanic: the last way to go (but also the only one that guarantees 100% sure results) is the intervention of a specialized workshop able to disassemble the engine, manually remove the injectors, and clean manually.

Other Cleaning methods for fuel injectors

1.   Liquid cleaning of the injector with chemically active compounds.

This injector cleaning technology is based on chemically active substances (for example, a solvent). The chemical method of flushing the injectors consists of connecting a special installation to a line that supplies fuel. In this case, the vehicle’s fuel system must be isolated from the flushing line of the injector cleaning platform. It is necessary to prevent chemically active flushing from entering the car’s fuel tank. The fact is that the cleaning agent will dissolve old dirt, which will further impair its operation if it enters the fuel system of the car. 

It is necessary to start the engine, which will run on a mixture consisting of a solvent and fuel. A pressure cleaner is then run through the fuel injectors to dissolve and wash away any deposits. All washed away impurities, and the cleaner will be burned in the cylinders of an operating internal combustion engine. To properly clean the fuel system nozzles, the duration of the procedure should be half an hour. After cleaning the injector, you need to turn off the engine and be sure to replace the engine oil, spark plugs and oil filter. Also keep in mind that always use oil drains pans while replacing engine oil and filter to avoid any mess.

The cleaning process can be carried out without removing the injectors, which significantly simplifies the procedure. Simultaneously, the cleaning agent, circulating through the fuel system, penetrates the combustion chambers and ensures the removal of contaminants in the injectors’ internal channels, on the fuel rail, on the parts of the piston group and valve surfaces.

2.  Cleaning fuel injectors with ultrasound.

This procedure involves removing the injectors from the engine and installing them on a special stand. Such injector cleaning technology is based on the use of ultrasound waves and the effect of cavitation. For the procedure, the fuel injectors are placed in the bath of the cleaning stand, filled with a special chemically neutral liquid.

At the bottom, there is a source of ultrasonic waves, which ensures acoustic cavitation’s appearance in the cleaning solution. The formation of tiny air bubbles, when bursting in a liquid, form high-power acoustic waves. As a result of wave shocks, the injector’s internal cavities and external surfaces are intensively cleaned.

Electric current pulses are applied to them, ensuring the rhythmic closing/opening of the solenoid valve. The cleaning process’s speed is influenced by factors such as the power of the ultrasonic emitter and the temperature of the cleaning liquid. After completing the cleaning procedure, a unique stand checks the fuel injectors’ performance and the fuel mixture’s quality of atomization. 

Ultrasonic cleaning of fuel injectors is recommended when there is a noticeable deterioration in their performance, which, as a rule, indicates the presence of significant contamination of the injector. It should be noted that highly qualified specialists should carry out this procedure. When performing ultrasonic cleaning, violation of technological requirements often destroys the ceramic coating, solenoid valve winding, and other fuel injectors elements.

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