Best Car Fuel Injector Cleaners

A man standing at a gas station with his Ford Mustang
As a keen car investor, your pride and joy is likely to be an older car, which you may not drive on a daily basis. Such cars are particularly prone to a build-up of dirt in their fuel injectors. Over time, the injectors will fail to deliver the balanced mist of gas essential for fuel performance and efficiency, and your car will suffer.

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By cleaning your fuel injectors, you can save money. You’ll see a reduction in fuel costs, and less wear on expensive items like fuel pumps, injectors, and piston rings. The best fuel injector cleaners on the market are not expensive and are easy to use. Our top choice is Lucas Fuel Treatment.

Lucas Fuel Treatment

Best overall (5/5)

A blend of super slick oils and additives with a high detergent action, Lucas Fuel Treatment allows the engine to operate at its most efficient.

  • Formulated for both petrol/gasoline and diesel engines, carburetted or fuel injected
  • Especially effective for diesel cars that aren’t driven long distances
  • Lubricates fuel for increased MPG
  • Neutralises the harmful effects of low sulphur diesel fuel
  • Replaces the benefits of lead in gasoline without causing harmful emissions

The bottle lasts for ages and is effective even when you fill up with supermarket fuels.

With Lucas, you’re likely to see an improvement in your MPG. You may also experience a smoother engine, although it can take about 500 miles to see the difference.

BrandLucas
Model10013 (USA) / 10013 (UK)
Size128 fl. Oz. / 1 gallon

Chevron Techron Concentrate Plus Fuel System Cleaner

Best for petrol/gasoline engines (4/5)

Techron Concentrate Plus offers a complete fuel system treatment for petrol/gasoline vehicles.

  • Helps remove harmful deposits from fuel injectors, carburettors, inlet valves, and combustion chambers
  • Restores lost power and performance caused by deposit build-up
  • Improves cold start performance
  • Reduces harmful emissions
  • Will not harm catalytic convertors and oxygen sensors

Chevron recommend using this concentrate every 3,000 miles to clean the entire fuel system. Modern engines work at their best when they are clean. Techron is effective at keeping both modern and older engines clean.

Users agree that their cars felt smoother and more responsive after use. Many also saw an added benefit of increased MPG.

BrandChevron
Model65740 (USA) / 4035626 (UK)
Size20 fl. Oz. / 350ml

Wynn’s Full Petrol System Cleaner

Easiest to use (3/5)

Wynn’s Full Petrol System Cleaner increases engine power and reduces fuel consumption and toxic exhaust gases. It is ideal for all gasoline injection engines (both new and used).

  • Cleans the entire fuel system (injectors, carburettors, and valves)
  • Protects the fuel system from premature wear and tear by reducing rust and corrosion
  • Reduces carbon deposits in the combustion chamber
  • Simple and easy to use

For best results, use the cleaner in every third tank of fuel. Add one 325ml bottle to at least 20 litres of gasoline.

You may find, like other users, that your car feels completely different after using this product (in a good way!).

BrandWynn’s
ModelWYN70759 (USA) / W70759 (UK)
Size10.99 fl. Oz. / 325ml

STP Super Concentrated Fuel Injector Cleaner

Best for increasing MPG (4/5)

This well-known brand has gone all-out with its Super Concentrated Fuel Injector Cleaner, formulated with jet fuel. With high quality active ingredients, it unclogs dirty fuel injectors to restore performance.

  • Removes harmful deposits
  • Helps restore lost power and acceleration
  • Contains concentrated detergents that help remove harmful carbon, gum and varnish deposits
  • Helps to avoid problems such as rough-idling, weak acceleration, stumbling and stalling

If you’ve noticed a decline in your MPG, this product is great for helping to get it back to normal.  

BrandSTP
Model78575 (USA) / 78575 (UK)
Size5.25 fl. Oz.

Liqui Moly 2007 Fuel Injection Cleaner

Fastest-acting (4/5)

Holy Liqui Moly! This fuel injection cleaner is researched, developed and manufactured in the holy grail of car manufacturing countries, Germany.

  • Contains an effective combination of active agents for cleaning and protection
  • Removes and then prevents deposits on injection and intake valves, spark plugs, and in the combustion chamber
  • Suitable for all petrol/gasoline injection engines
  • One 300ml can is enough for up to 70 liters of fuel

This cleaner is ideal if you’re looking for something fast-acting and effective. Many users notice a difference after only a few miles.

BrandLiqui Moly
Model1803 (USA) / 1803 (UK)
Size300ml

Best Fuel Injector Cleaner Buying Guide

Why should I use a fuel injector cleaner?

Many people say using a fuel injector cleaner is unnecessary unless you’re experiencing issues. We all know that prevention is better than cure though. Taking a proactive approach will help your car perform at its best and last as long as possible.

Using a fuel injector cleaner is a low cost way of preventing future issues and damage. It’s particularly helpful if your car hasn’t been serviced for a long time.

When you fill up your tank, you expect to drive a certain number of miles on it. If deposits have caked the engine, it has to work harder (and is less efficient!) every mile. Using a fuel injector cleaner helps to maximise fuel economy.

Signs of clogged fuel injectors

Not sure if you have clogged fuel injectors? Common signs include lower fuel economy (nobody likes to hurt their wallet when it can be avoided!), rough start up and idling, stuttering and misfiring, and weak acceleration (no longer getting 0-60 in 4.4 seconds like the adverts promised?!).

How to use a fuel injector cleaner

This will be music to your ears. Fuel injector cleaners are so simple to use, and you can use them at a gas station during a regular fill-up.

With your bottle of fuel injector cleaner to hand, run your tank to near empty. Paying close attention to the instructions on the bottle, add the recommended amount to your fuel tank, then fill up with fuel. Simple. This will allow for an optimal mix of gas and cleaner.

There may be more steps for some products, so reading the instructions is key. The video below shows how easy it is to use these products.

Benefits of fuel injector cleaners

The key benefits of using a fuel injector cleaner include:

  • Reduced MPG (more miles for your bucks!)
  • A smooth-running engine (more enjoyment from your ride!)
  • Better performance
  • Reduced toxic exhaust gases
  • Protecting important engine components from damage

And remember, if you’re in the car investment game, maintaining your pride and joy will help you to realize its top value when you come to sell.

Considerations

How often should I use a fuel injector cleaner?

This depends on several factors, including your car’s age and servicing history, and how the car is currently performing. Older, less frequently driven cars may need extra TLC, as will cars that haven’t been regularly serviced. You’ll recognize if your car isn’t performing at its best.

Which conditions can affect the build-up of dirt?

Cold weather can cause more of a build-up, as can sitting in traffic for long periods of time. Longer, free-flowing traffic journeys are less likely to cause problems. So if you’re a frequent city-driver, you’re more likely to need to clean your fuel injectors than if you’re a countryside-cruiser.

Does it matter what type of fuel I use?

Generally, lower quality fuel has less detergent in than high quality fuel, and this can cause dirt to build up more quickly. If you are a regular low-grade filler-upper, using a fuel injector cleaner will make a notable difference to performance.

Petrol pumps

Does the car’s mileage have an impact?

In short, yes. The higher the car’s mileage, the worse the build-up of dirt will be.

How do I get the best results from my fuel injector cleaner?

Products can vary, so always follow the instructions on the bottle. It’s important you do exactly as they say to get the best results from the product.

How soon will I see results from a fuel injector cleaner?

Factors that will affect this include the amount of build-up the car has and the issues you’ve been experiencing. Improvements won’t always be noticeable straightaway. We love Liqui Moly 2007 Fuel Injection Cleaner for fast-acting results.

Conclusion

We’ve reviewed the top products available on the market today. All the products mentioned will do a sterling job of cleaning your fuel injectors.

Our favorite was Lucas Fuel Treatment, as it is long-lasting and effective. It also received fantastic reviews from users. They were particularly impressed with the smoothness of the ride and the improvements to MPG after use.

Liqui Moly 2007 Fuel Injection Cleaner came a close second. Many users saw a difference in fuel efficiency and performance after only a few miles.

For petrol/gasoline engines, a great choice is Chevron Techron Concentrate Plus Fuel System Cleaner. It is unbeatable in cleaning the entire fuel system, and users found their cars more responsive after use.

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