The Best Fuel Injector Cleaners: Improve Your Vehicle’s Performance

Whether you just bought an older car to fix up in your spare time or want to make your new model sing, Gumout High-Mileage Fuel Injector Cleaner is a good place to start. This chemical fuel injector cleaning system comes in a set of six, with each container holding 6 ounces of the formula. Designed to tackle carbon deposits on weathered vehicles, this formula is built to work on engines with more than 75,000 miles on them. 

Don’t let that deter you if you’ve got a newer model, though. It just makes the results that much more powerful. This cleaner effectively corrodes the carbon that’s caked onto the fuel injection system. It’s safe to use with the oxygen sensors in super and turbocharged vehicles; and, due to its quality manufacturing, won’t void OEM contracts. So, if you’re looking to improve your engine without investing in shop time, this fuel injector cleaner is a solid choice overall. 

Keep in mind that each bottle works for a single treatment. It comes with six, but they are in clear containers which exposes the contents to light. Store them in a dark place to avoid shortening the shelf life.

The Sea Foam IC5 Fuel Injector Cleaner is an excellent choice because it's affordable and simple to use. It's designed to clean fuel injectors and improve injector spray patterns, which increase engine performance. The product can be used in all types of gasoline fuel injection engines. It restores fuel economy, reduces exhaust emissions, and lubricates upper cylinders. 

IC5 is available in a concentrated 5.25-ounce bottle and treats up to 25 gallons. It even works on capless tanks. When used regularly, IC5 can boost performance by preventing hard starts, rough idling, and hesitations. Users report that their vehicles drive noticeably smoother after using this product. Overall, it does a good job of cleaning the fuel injectors and the entire fuel system. 

Some people, however, don't notice a significant difference in fuel economy after using IC5.

When you fix a part of your car, the goal is to keep it working for as long as possible. That’s why the high-efficiency rating of the STP Water Remover All-Season Cleaner is so desirable. It is built to preserve the well-being of your fuel injector system as a whole. The main use of this formula is to remove water from your fuel system (an essential part of perfecting the combustion itself). It achieves this goal without the use of alcohol, making it a safe additive for vehicles of all types. The result is fuel lines that are less likely to freeze and a system that, as a whole, is less susceptible to corrosion. It’s a good pick if you live in an area prone to extreme weather since it will work in any climate. This fuel injector cleaner works with capless gas setups, meaning you can use it on just about any vehicle. Powerful and effective year-round, this is a highly efficient solution. 

It’s worth a mention that this works best in conjunction with a full fuel injection system cleaning job. So long as it’s used properly, it can prevent residue buildup as your vehicle ages.

The Red Line Complete SI-1 Fuel System Cleaner is designed to clean fuel systems and prevent corrosion from occurring. Using SI-1 ensures long life and improved operation of your gas-powered engine. This product contains synthetic upper cylinder lubricant and cleans injectors, carburetors, valve, and combustion chamber deposits using high-temp and low-temp detergents. 

It can tackle all types of fuel injectors, including GDI, and can be used with oxygenated fuel. You can also use it safely on a regular basis. The SI-1 boosts fuel stability, keeps gum and varnish from forming, and cleans pollution control valves. 

One bottle per tank provides almost 100 percent efficiency and effectively cleans your fuel system. While this product is a little more expensive than some of its competitors, it is one of the best fuel system cleaners available.

The Liqui Moly 2007 Jectron Gasoline Fuel Injection Cleaner removes carbon deposits from injection and inlet valves, fuel pipes, and fuel distributors, and it's ideal for engines with catalytic converters. It's an excellent inexpensive product to use on older, sluggish vehicles. Jectron stops starting problems, hesitation, and stalling and promotes smoother idling and better throttle response. It is a low-pollution product that promotes environmentally sound combustion. Jectron also works to reduce fuel consumption and restore an engine's original performance by using accurate injector dosing and fuel atomization. Some users report they can actually hear a difference when the cleaner hits the combustion chambers. Overall, the engine should feel more responsive, stronger, and quieter after using this product. Some users, however, don't notice a difference in mileage after using it.

The Chevron Techron Fuel Injection Cleaner is compatible with carbureted or fuel-injected spark ignition engines. You can safely use it every 1,000 miles and on vehicles with catalytic converters and oxygen sensors. This product restores lost fuel economy and removes water to prevent gas line freeze. Users report that provides an increase in horsepower, makes the engine run much more smoothly and improves the idle. It tackles carbon deposits and can slightly improve fuel economy. It's also easy to use as the container's neck fits down the fuel filler neck, and it’s a great option for vehicles with high mileage. 

However, not all users notice a change in fuel economy after using this product. Also, it is not recommended for air-cooled, two-stroke engines.

Over time, your vehicle’s fuel injectors can become altered, which in turn alters performance — but with Berryman Products B-12 Chemtool Fuel Injector Cleaner, you can bring back their former glory. Specially formulated to reduce emissions and lower your maintenance costs, using this fuel injector cleaner on a regular basis will restore your injectors, bringing them back to their original factory spray pattern. 

Made with a solvent-based formula, this product will eliminate moisture and gum (along with other residues left behind by fuel) in no time at all. Once applied, it gets to work cleaning intake valves, port deposits, and more. And while it does so, you’ll wind up with improved engine performance, better fuel economy, and a smooth-running fuel system.

While this fuel injector cleaner is compatible with a number of different makes and models, make sure to check that it’s suitable for use in your particular vehicle. It may not deliver the results you expect if it isn’t a proper match. 

If you’re facing a fuel system that’s full of dangerous deposits that just won’t go away, you need a bottle of STP Super Concentrated Fuel Injector Cleaner. This extra-strong formula is made to be even more effective on your fuel injectors, delivering the performance and acceleration you’ve lost over time.

In fact, this fuel injector cleaner is actually made with concentrated detergents and jet fuel, which is a carrier of active ingredients. Once used, the liquid will dissolve and eliminate dangerous deposits in your fuel injectors and throughout the fuel system. It can get rid of varnish, gum, and carbon, and it’ll solve woes like hard starts and rough idling. If you use this cleaner every oil change, you can see improved acceleration, more power, and the old factory-fresh engine performance you loved when you first bought your vehicle.

This product is safe for any gasoline engine and can treat up to 21 gallons of gas, but it isn’t suitable for use with diesel engines.

Royal Purple Max Atomizer Fuel Injector Cleaner is a highly concentrated formula that’s designed to restore a high level of engine performance under the hood. 

Formulated just for modern direct injection engines, this cleaner can be used with any kind of fuel injection setup. Once it’s added into your gas tank, its highly concentrated polyether amine (PEA) detergents will unclog and unchoke injectors. You’ll see restored fuel injector spray patterns, better fuel atomizing, and overall enhanced performance. 

If you use Royal Purple’s fuel injector cleaner regularly, you’ll easily combat issues like slow, rough starts and a rough idle. It’ll lead to quick starts, smoother idle, and more power from your engine. All you have to do is add it into your fuel at least once every 3,000 miles — or even as frequently as every time you fill up. This cleaner even stabilizes ethanol to prevent harmful effects on your engine.