The best fuel system cleaners of 2024


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Over time all vehicles go through some wear and tear, which is why regular maintenance is important, caring for your car can help prevent minor problems from becoming major issues. The fuel system is one area of car maintenance that is sometimes overlooked. Carbon buildup and other harmful contaminants can interfere with your engine’s performance, fuel system cleaners help to remove harmful deposits and prevent new ones from forming. Regular maintenance with a fuel system cleaner, and regular oil changes, can help you avoid more serious engine trouble down the road. Here are the best fuel system cleaners currently available on Amazon.

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$5.97 at Amazon

This STP Complete Fuel System Cleaner is packed with cleaning agents that will clean the fuel system and restore performance for vehicles with over 75,000 miles. This cleaner is recommended to be used every 4,000 miles or during an oil change. It’s very simple to use and just needs to be poured into the gas tank while it’s half full. This fuel system cleaner from STP has a stellar 4.7 out of 5-star rating from users. Reviewers commented on how much they liked the quality and value of this product. 

Key Specs

  • Prevents rough idling and stalling
  • Improves fuel efficiency
  • Prevents corrosion
  • Use every 4,000 miles
  • Recommended for vehicles with 75,000 miles or more
  • 5.25 oz. bottle

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$11.14 at Amazon

This K&N Performance+ Fuel System Cleaner is safe for any type of gasoline engine, whether it’s carbureted or fuel injected, and will clean up the entire fuel system. It will reduce carbon buildup while improving throttle body response and restoring lost acceleration. This fuel system cleaner has a stellar user rating at Amazon. 75% of all user ratings are 5-star ratings. Reviewers have cited quality and value as two major pros of this product. 

Key Specs

  • Reduces carbon deposits buildup
  • Safe for any gasoline engine
  • Treats a maximum of 21 gallons of fuel
  • 15.2 oz. bottle
  • Made in the U.S.A

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$8.98 at Amazon

This Chevron Techron Concentrate Plus Fuel System Cleaner will clean, restore and protect the fuel system. It restores lost engine performance and helps improve fuel economy. It also reduces rough idling, engine surge and spark plug fouling. This cleaner is recommended to be used every 3,000 miles and treats up to 12 gallons of fuel. Some pros about this product, according to reviewers, are the quality, value, and ease of use. 

Key Specs

  • Cleans and maintains the fuel system
  • Restores lost power, acceleration and fuel economy
  • Smoother idling
  • Treats up to 12 gallons of fuel
  • Recommended to be used every 3,000 miles

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$23.06 at Amazon

The Liqui Moly Pro-Line Gasoline System Cleaner removes carbon deposits and buildup from the injectors and combustion chamber of your vehicle. It can also reduce emissions and improve the efficiency of the engine. This cleaner can treat up to 18 gallons of fuel. Positive reviews of this product noted improved fuel economy and better engine performance.

Key Specs

  • Removes deposits from the combustion chamber and injectors
  • Reduces emissions
  • Improves engine efficiency
  • Corrosion resistant
  • Treat a maximum of 18 gallons of fuel

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$18.99 at Amazon

Quicksilver Quickleen Engine and Fuel System Cleaner has a powerful detergent blend that works great with all grades of gasoline and ethanol fuel. This cleaner acts quickly to remove carbon deposits and buildup from the carburetors, injectors, spark plugs, intake valves, piston crowns and cylinder heads. It can be used at every fill up and one ounce treats up to five gallons.

Key Specs

  • Powerful detergents
  • Works with all grades of gas and ethanol
  • Extends the life of the spark plugs
  • Prevents engine knocking
  • Smoother idling

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$29.25 at Amazon

The Red LIne Complete Fuel System Cleaner is a fuel additive that cleans carburetors, injectors, valve chambers and combustion chambers. This additive uses a blend of high and low-temperature detergents to clean out the fuel system. This cleaner is recommended to be used every 3,000 miles.

Key Specs

  • Cleans and prevents corrosion
  • Cleans injectors, carburetors, combustion and valve chamber deposits
  • Enhances fuel economy
  • Helps regain lost horsepower
  • Use every 3,000 miles

Frequently Asked Questions

How to use a fuel system cleaner?

Using a fuel system cleaner is very easy, but always read the instructions before adding it to your fuel tank. While at the gas station for a routine fill up, add the fuel system cleaner additive first and then fill the tank with gas. 

What does a fuel system cleaner do?

A fuel system cleaner uses a blend of detergents that clean your fuel system by removing carbon buildup and lessen buildup that will occur in the future. They also limit corrosion and rust while improving throttle response and acceleration. 

What is the difference between fuel system cleaners and fuel injector cleaners?

They have similar names and do a lot of the same things, but they aren’t identical. Fuel injection cleaners only clean the injectors themselves while fuel system cleaners target the entire fuel system. 

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