The Best Fuel Injector Cleaner 2022

The use of a quality fuel injector cleaner can completely transform the performance of your engine and fuel economy. Within this article, we list some of the best formulas for diesel and petrol engines that simply pour straight into your fuel tank.

Tweet Pin It
Best Fuel Injector Cleaner
YourCar is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Find out more.

After plenty of research and testing some of the formulas, we found that the best fuel injector cleaner is the STP Ultra 5-in-1. It’s suitable for both petrol or diesel powered cars and is designed to clean and protect the fuel system and injectors. However, if you would prefer a dedicated diesel fuel injector cleaner, the brand offer a diesel specific formula.

In order to rate the fuel injector cleaners, not only did we test a number of formulas (as shown in the image above), we also rated them based upon certain factors. These factors included their cleaning abilities, brand reputability, treatment duration and value for the money.

Fuel Injector Cleaner Comparison

Fuel Injector CleanerTypeTreatment
STP Ultra 5-in-1Petrol/DieselEvery 4,000 Miles
Redex Fuel System CleanerPetrolEvery Tank
Wynns 55964PetrolEvery Three Months
STP DieselDieselEvery 3,000 Miles
Hydra Power BlastDieselEvery Three Months
Forte Diesel SpecialistDieselEvery Three Months

For the best results when using a fuel injector cleaner, it’s advised that you pour the formula into the tank before you fill up with fuel. This allows the fuel and cleaner to mix more efficiently rather than the formula just sitting on top of the fuel if it was to be poured in afterwards.

Below is a list of the best fuel injector cleaners that restore performance, reduce fuel economy and easily mix with a full tank of fuel.

The Best Fuel Injector Cleaner

1. STP Ultra 5-in-1 System Cleaner

STP Ultra 5-in-1
The STP brand produce a number of fuel injector cleaners but their Ultra 5-in-1 formula is by far the best. It’s designed to clean both the fuel system and injectors as well as prevent the build up of harmful deposits.

Other features of the STP Ultra 5-in-1 include:

  • Concentrated 400 ml bottle
  • Restores peak performance
  • Reduces friction and inhibits corrosion
  • Designed for use every 4,000 miles
  • Treats 50/60 litres of fuel per bottle
  • Available in a diesel equivalent formula

Although expensive when compared to some of the alternatives, the STP Ultra 5-in-1 is the best fuel injector cleaner in the UK and worth the added investment. It completely clears out the fuel system and injectors whilst also providing preventative measures to prolong peak performance.
Check it Out

2. Redex Petrol Fuel System Cleaner

Redex Fuel System Cleaner
Redex are a brand that specialize in additives and their petrol system cleaner is one of their most rated products. It’s designed to restore performance and reduce emissions from a single treatment to a full tank of petrol.

Other features of the Redex Fuel System Cleaner include:

  • Use every tank of fuel
  • Available in a 250 ml or 500 ml bottle
  • Suitable for all petrol engines
  • Cleans and reduces emissions

Overall, it’s one of the cheapest fuel injector cleaners that’s actually worth buying and it won’t disappoint. For the best results, it’s worth pouring a bottle into every full tank of fuel, which will help maintain peak performance and efficiency.
Check it Out

3. Wynns 55964 Fuel Injector Cleaner

Wynns 55964
The Wynn’s Injector Cleaner is another highly rated formula that’s designed for petrol powered vehicles. From a single treatment of the formula, the brand states that it will clean and maintain the fuel system to its optimum condition.

Other features of the Wynn’s Fuel Injector Cleaner include:

  • Safe for turbochargers and catalytic converters
  • Reduces fuel consumption
  • Maximizes engine performance
  • Bottle treats 50 litres of fuel
  • 325 ml bottle

Overall, the Wynn’s Injector Cleaner is an excellent all-round option that’s affordable and highly effective. For the best results, it’s advised that you use the cleaner every three months or every third full tank of petrol.
Check it Out

4. STP Diesel Injector Cleaner

STP Diesel
Another STP injector cleaner that’s highly rated is their formula dedicated for bio and regular diesel cars. According to the brand, it’s able to unclog dirty injectors in one tankful to restore lost performance and fuel economy. For the best results, the brand recommend using this injector cleaner every 3,000 miles so that your car continues to run smoothly.

Other features of the STP Diesel Fuel Injector Cleaner include:

  • Cleans and prevents further build up of deposits
  • Restores lost performance and improves fuel economy
  • Pours into a full tank of diesel
  • 200 ml bottle
  • Available as a petrol alternative

Overall, this STP formula is the best diesel fuel injector cleaner that’s relatively affordable and provides great results. It’s also produced by the highly reputable brand that specialize in additives for complete peace of mind.
Check it Out

5. Hydra Diesel Power Blast Injector Cleaner

Hydra Power Blast
The Hydra Diesel Power Blast is a premium fuel injector cleaner that cleans the injectors and stabilizes the fuel. According to the brand, it can be used in all types of diesel engines, which includes cars, vans, boats, generators, military vehicles and much more.

Other features of the Hydra Diesel Power Blast include:

  • Available in 250, 500, 1000 or 2000 ml bottles
  • 50 ml treats 50 litres of diesel
  • Cleans and protects the injectors
  • Suitable for all diesel engines
  • Improves fuel stability

Although expensive, the Hydra Power Blast is a high quality diesel fuel injector cleaner and worth paying the extra. Considering that just 50 ml treats 50 litres of diesel, the full bottle will go along way and won’t disappoint.
Check it Out

6. Forte Diesel Specialist Injector Cleaner

Forte Diesel Specialist
Forte are a brand well-known for their highly rated DPF cleaner but they also produce a range of other additives such as this fuel injector cleaner. The “Specialist” formula is designed to provide rapid cleaning of the injectors by removing harmful deposits that have built up over time.

Other features of the Forte Diesel Specialist Injector Cleaner include:

  • 400 ml bottle size
  • Compatible with all diesels
  • Promotes easier cold starting
  • Lowers exhaust emissions
  • Mixes with 40 litres of diesel fuel

If it wasn’t for the expensive price tag, the Forte Specialist Injector Cleaner would be matching the STP alternative as the best. It pours straight into the fuel tank and specifically targets the injectors for better all-round performance. If the price isn’t an issue and you prefer to buy from the reputable Forte brand, their formula won’t disappoint.
Check it Out

How We Rated The Fuel Injector Cleaners

Due to the large amount of fuel injector cleaners on the market, it can be difficult to find the best that promise results. To help you choose the best, we have based our recommendations upon testing and research. After using the STP Diesel formula in one of my diesel cars, I certainly saw an increase in miles per gallon on long motorway drives. We have also been using the Redex formula in some of our petrol cars for many years too.

In terms of our research, our recommendations are also rated based upon their cleaning abilities, brand reputability, treatment duration and value for the money.


Fuel injector cleaners have been proven to work on a range of vehicles and can completely change their performance. From a sharper throttle response to improved fuel economy, there is a whole list of improvements that can be made.

All of our recommendations are suited to both diesel or petrol cars and simply pour into a full tank of fuel. For the best results, it’s advised to pour the cleaner into the tank before filling the tank up to the brim.

YourCar Author Dan

Written By Dan

Dan has been a car enthusiast ever since he can remember and has an extensive range of cars that include classic cars that he has restored himself from a barn find condition to modern performance cars. Whether you need advice on how to install car parts or recommendations on what products to buy, Dan’s first-hand experience will certainly help.

If you want to find out more about Dan, our testing process or the website itself, visit our about page for further information.

Follow #YourCarUK

Copyright © 2022. All rights reserved.