Best Fuel Injector Cleaner – Bonus: How to clean your fuel injectors guide

When your car sputters or has a rough idle, you may have issues with your fuel injectors. Top rated injector cleaner is not something you have to spend a fortune to purchase. In fact, our reviews will direct you toward finding the best product at the best price. See below the reviews for more information about fuel injectors.

Our Top Pick of Fuel Injector Cleaners

Top Pick
Lucas Fuel Injector Cleaner

The Best Fuel Injector Cleaner Reviews

Seafoam Fuel Injector Cleaner SF-16

Seafoam fuel injector cleaner is a fantastic product. We couldn't really find anything negative to say about this system cleaner. If you’re looking for a great fuel injector cleaner, this may be it. Seafoam fuel injector cleaner can actually be added to the fuel tank, carburetor or crankcase. Sea foam SF16 will remove moisture and clean the fuel system. The manufacturer recommends that you use every 5,000 miles.

Cost - Sea Foam fuel injector cleaner ranked in at number 2 on our price guide. This price was calculated on price per ounce. Seafoam will run about $.50 per ounce. This price makes this injector cleaner very appealing to savvy consumers.

Why It Made The List: It has a wide range of application locations, and it will be just as effective.

Seafoam Fuel Injector Cleaner

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Lucas Fuel Injector Cleaner and Fuel Treatment

Lucas system cleaner has to be one of the best products we’ve ever reviewed. It claims to lower exhaust emissions, increase fuel mileage and increase power while also acting as a fuel injector cleaner. Many customers purchased this product as a system cleaner and have found numerous benefits as preventative maintenance. It was even able to help solve the dreaded “check engine light” problem some customers have.

Cost - Lucas fuel injector cleaner tops the list of our price check rankings. At just under $.20 per ounce, it is easy to see why it is one of the best fuel injector cleaner products out there.

Why It Made The List: Lucas fuel injector cleaner works wonders on more components than just the injectors.

Lucas Fuel Injector Cleaner

Chevron Fuel Injector Cleaner

Chevron fuel injector cleaner, or Techron fuel injector cleaner, is categorized as a complete fuel system cleaner. It can be used in all ethanol fuels as it has been tested as both safe and effective. This system cleaner will clean and protect major components in your engine from fuel injectors and intake valves to carburetors and combustion chambers. It can be used every 3,000 miles. Not only is Techron fuel injector cleaner safe for use in your car or truck, but the manufacturer recommends use in all gasoline engines like boats, ATVs, motorcycles, and RVs.

Cost - Chevron fuel injector cleaner comes in third in our cost comparison. At the time of this review, it was roughly $.70 per ounce.

Why It Made The List: It works very well in all engines that take gasoline.

Techron Fuel Injector Cleaner

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer

Royal Purple Fuel System Cleaner has a recommended use of every 10,000 miles. It is a “state-of-the-art” fuel system cleaner. Not only will it protect newer engines through preventative maintenance, but it will also work to clean all engines. Royal Purple fuel system cleaner has been rated to improve fuel economy by 3.2%, on average. It has also been measured to increase horsepower 2.6%, on average. This engine cleaner will also reduce emissions and hydrocarbons.

Cost - Royal purple fuel system cleaner is lower on our list for price ranking. It ranks in at number 7 but is actually reasonably close to its competitors in price. At $.91 per ounce, it is just $.05 more than its nearest competitor.

Why It Made The List: It has been shown to increase horsepower and reduce emissions.

Royal Purple Fuel Injector Cleaner

BG Fuel Injector Cleaner - 44K

BG44k fuel injector cleaner is oxygen sensor and catalytic converter safe. It will clean fuel injectors and help to prevent common fuel system issues. Users claim that this product has given a tremendous increase in miles per gallon (MPG) of their car. Some users even reported that they have been using BG44k fuel injector cleaner for over two decades. The customer loyalty is a true testament to the quality that BG fuel injector cleaner provides. This is even more impressive when you consider the cost.

Cost - BG44k fuel injector cleaner ranked in 8 out of 8 on price for our review list. At $2.16 per ounce at the time of this review, it is just over two times the price of its competitors.

Why It Made The List: It can be used in cars that have a catalytic converter and not cause it any damage.

BG Fuel Injector Cleaner

Red Line Complete SI-1 Fuel System Cleaner

Red Line Complete is a fantastic fuel injector cleaner. Some users claim that this fuel system cleaner is the best product in its category. The manufacturer claims that this cleaner also “reduces the need for octane by 2 points.” This can be pretty significant if you are considering using an octane booster. Redline fuel injector cleaner may be able to provide the benefits you are looking for in just one product. Users also commented on the price of this fuel system cleaner saying it was one of the most cost-effective ways to achieve the desired results -- cleaning your fuel injectors.

Cost - Our cost analysis was comparative to that of other users of Red Line fuel injector cleaner. We found it came in at $.86 per ounce, which places it at number 5 in our list.

Why It Made The List: Cleans injectors while reducing the need to use higher octane gasoline. Saving you money in the long run.

Red Line Fuel Injector Cleaner

Star Tron Enzyme Fuel Treatment

Star Tron fuel injector cleaner is a perfect preventative product that has been rated safe for use in all engines, including 2-cycle pre-mix. This means you will get more bang for your buck because you can use it on all your engines, including your car. What makes Star Tron system cleaner so great is the stabilizing formula. You can use it when storing your vehicle, RV, boat or other engine driven machines, and the manufacturer says it will stabilize the fuel for up to 2 years. It can also rejuvenate old fuel. Don’t forget that this system cleaner is a world-class fuel injector cleaner as well.

Cost - Star Tron Fuel Injector Cleaner is ranked number 6 in our price list. It costs about $.86 per ounce, at the time of this review.

Why It Made The List: Doubles as a stabilizing formula to protect your fuel tank and lines when storing your car, boat, RV or other machines that use gasoline.

Star Tron Fuel Injector Cleaner

Liqui Moly Jectron Gasoline Fuel Injection Cleaner

The manufacturer of Liqui Moly fuel injector cleaner claims that the product will cause your engine to regain its original performance. Regular users would agree. In fact, it was hard to find any fuel injector reviews that said anything bad about Liqui Moly Jectron. This product is also safe to use with catalytic converters.

Cost - Liqui Moly Jectron fuel injector cleaner ranks number 4 on our price list at $.85 per ounce.

Why It Made The List: Has the potential to restore your engine to its original performance.

Liqui Moly Jectron Fuel Injector Cleaner

What Are Fuel Injectors?
And How Do I Know If They Are Dirty?

Fuel injectors are small valve-operated parts connected to the fuel rail above the intake manifold in a modern fuel combustion engine. Although small, fuel injectors play a vital role in the fuel injection system by controlling the amount and pressure of the fuel that is injected into the combustion chamber of the engine. Over time, fuel injectors can become dirty or clogged by collecting dirt and grime from the fuel as it passes through, causing the engine to operate less efficiently.

How do you know if your fuel injectors are dirty and need to be cleaned?

Here are a few signs to look for:

  • Higher fuel consumption
  • The vehicle fails an emissions test
  • The engine sputters or hesitates
  • The car idles “rough” (the engine struggles or shakes when the car is sitting still)
Best fuel injector cleaner

You don't need to take your car to a mechanic to clean your fuel injectors. You can do it yourself with one of the best fuel system cleaners.

If you are experiencing any of these symptoms, it may be time for a fuel injector cleaning. However, because most modern vehicles have computer and sensor systems that adjust for small changes in fuel pressure, your fuel injectors may need to be cleaned even if you are not yet experiencing symptoms this obvious. The only way to know for sure if your injectors need to be cleaned is to remove them from the fuel injection system and run them through a pressure test. Alternatively, most people find that using a fuel injector cleaner as an additive will alleviate most common symptoms. Nearly all system cleaners can be used as a preventative as well.

Fuel injector cleaning is a part of regular vehicle maintenance. Even if the vehicle is being operated correctly and in perfect conditions, fuel injectors will become dirty over time. Check your owner’s manual to see how often the manufacturer recommends cleaning or replacing the fuel injectors.

System cleaner: additives and preventatives

In addition to the more detailed fuel injector cleaning described below, there are a variety of other steps you can take to keep your vehicle’s fuel injection system healthy and operating at its full capacity. Here's a recap of the different types of products you can consider:

Fuel System Cleaner, also known as engine cleaner is a product that is added directly to the gas tank to prevent rust and corrosion, breaking down carbon buildup and keeping the fuel injectors clean. These cleaners are made by a variety of different companies, and the best results are usually attained by multiple treatments.

Fuel Additives, also known as fuel treatments or fuel stabilizers are another type of product added directly to the gas tank. In addition to cleaning the fuel system, fuel additives help to treat and stabilize the fuel in your gas tank. With a fuel additive, gas can be safely left in the tank of a vehicle for extended periods of time (some products claim to stabilize fuel for up to two years) while avoiding the effects of phase separation and oxidation that can cause problems when you go to start the engine back up again. This is important because adequately treating the fuel in your tank can help to prevent avoidable buildup or damage to your fuel injection system.

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How To Clean Fuel Injectors -
Detailed user guide for advanced cleaning kits

This guide will give you very detailed step-by-step instructions for cleaning your fuel injectors. This guide requires extra tools beyond a cleaner that can be put in with the gas.

  1. Obtain a fuel injector cleaning kit

    A fuel injector cleaning kit consists of a pressure tube that injects the fuel injector cleaner through the fuel injection system and burns up in the engine. These kits can be purchased for between $120-200 and usually come with a canister of fuel injector cleaner. Although most are universal, make sure that the package you buy will work for your vehicle.
  2. Disconnect the fuel pump relay or fuse

    The detailed instructions on the fuel injector cleaning kit you purchased should specify whether you will be disconnecting a fuse or a relay on your specific vehicle.
    Check your owner’s manual to find the exact location of the fuse or relay.
    This will prevent the fuel pump from pumping gas into the fuel injector system while you flush it out with the cleaner.
  3. Disconnect the fuel pressure regulator vacuum line

    Check your owner’s manual to find this line. It will be located between the fuel rail and the intake manifold.
  4. Open the fuel tank gas cap

    Leaving the gas cap open will prevent the possible buildup of pressure in the gas tank during the injector cleaning.
  5. Connect the fuel injector cleaning kit

    Follow the instructions that came with your kit to connect it properly.
    Make sure to take note of which adapters you will be using for your specific vehicle and how many PSIs of pressure you should apply for cleaning.
    Check the lines you have connected for leaks before moving on to the next step.
  6. Start the engine

    During the cleaning, the engine will burn the injector cleaner as fuel.
    The cleaning is complete when the pressure tube runs out of cleaner, and the engine dies (should take 5-10 minutes).
  7. Remove the cleaning kit

    Carefully reconnect any fuel lines disconnected in the process of installing the cleaning kit.
  8. Reconnect the fuel pump relay, gas cap, and pressure regulator vacuum line

    Once you have reconnected the power to the fuel pump and the vacuum line, make sure to check the fuel lines for leaks one more time before starting the engine.
  9. Run the engine

    With the hood open, listen for sputtering or hesitation in the engine as it idles.
    Close the hood and take the vehicle for a short drive to ensure that it is running smoothly. Pay attention to the response of the throttle and how well the car accelerates from a stop.
    If the fuel injection system is not functioning correctly, the fuel injectors may need to be replaced.

Fuel injector cleaning: Precautions and tips

MAKE SURE TO OPEN THE GAS CAP BEFORE YOU START. Failure to remove the gas cap can cause a dangerous buildup of pressure in the gas tank during the cleaning process.

CHECK FOR LEAKS OFTEN. Throughout this process, you will be disconnecting and reconnecting fuel lines multiple times. A leak can not only cause a mess but can also cause inaccurate pressure readings.

MAKE SURE TO VENTILATE YOUR WORK AREA. Never run your vehicle in a closed garage or other enclosed areas.

NOT ALL VEHICLES ARE ALIKE. Check your owner’s manual for any special instructions concerning the maintenance of your fuel injection system.

Reduce emissions by using the best fuel injector cleaning product

Cleaning your fuel injectors has been shown to reduce emissions.

Fuel Injector Cleaner -
Complete Comparison Chart

Lucas Fuel Injector Cleaner
Seafoam Fuel Injector Cleaner
Techron Fuel Injector Cleaner
Star Tron Fuel Injector Cleaner
Red Line Fuel Injector Cleaner
Royal Purple Fuel Injector Cleaner
Liqui Moly Jectron Fuel Injector Cleaner
BG Fuel Injector Cleaner

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