10 Best Fuel System Cleaner Diesel in The UK

Last updated on 16/07/2025

Advertising disclosure

Archoil AR6400-D MAX Pro DPF Cleaner Diesel Fuel System, Diesel Injector Cleaner, Turbo, CAT Cleaner Concentrate - High Strength Carbon Removal & Exhaust Emissions Reduction for MOT Pass (400ml)

Why We Love It

Improves fuel economy significantly.
Ensures thorough engine cleaning.
Offers full ester lubrication.

Main Highlights

FAST, SAFE AND THOROUGH CLEANING. Suitable for all diesel engines, AR6400-D engine MAX contains a proprietary blend of carefully selected diesel additives / detergents and acts as a diesel particulate filter cleaner, egr cleaner and entire fuel system cleaner (fuel injectors, fuel filter, fuel pump, fuel lines). Also cleans engine, combustion area, glow plugs, turbo, DPF and catalytic converter.
RESOLVES AND PREVENTS RUNNING ISSUES. This diesel engine cleaner helps free a problematic EGR and rapidly reduces harmful emissions and unwanted smoke from the exhaust. Resolve engine running issues and restore lost engine performance and fuel economy. Enjoy a smoother and more responsive engine.
RESTORES ENGINE PERFORMANCE AND IMPROVES FUEL ECONOMY. This diesel fuel additive / diesel cleaner has been shown to enhance fuel mileage year round, by acting as a diesel fuel system cleaner, fuel injector cleaner, diesel turbo cleaner and catalytic converter cleaner.
FULL ESTER LUBRICATION. Additional diesel treatment functions include a proven Cetane Improver using the highest purity 2-EHN, proprietary ester lubricant, water remover and much more.
CUSTOMER SATISFACTION IS OUR PRIORITY. Feel free to contact us if you have any query regarding this petrol cleaner. All Archoil fuel cleaners include professional support and Performance and Emissions Pass Guarantee. Over a decade of success and trusted by professionals.

WYNNS Professional Diesel Injector Cleaner - One-Tank Solution for Optimal Fuel System Performance - Cleans & Lubricates Injectors - Improves Fuel Economy & Engine Efficiency - 500ml

4% Off

Why We Love It

Powerful one-tank cleaning solution.
Restores injector efficiency instantly.
Improves fuel economy significantly.

Main Highlights

✅ POWERFUL ONE-TANK CLEANING FOR DIESEL ENGINES: Formulated to deliver a deep and effective cleaning process in just one tank, ensuring that diesel engines operate at their peak performance. Designed to target and remove stubborn deposits, this advanced formula works efficiently to clean injectors and maintain optimal fuel delivery. It also contributes to keeping the EGR valve and turbo clean, preventing blockages that could impact engine efficiency. Suitable for all types of diesel engines, including high-pressure common rail and pump injector systems, this one-tank solution ensures thorough cleansing while optimising fuel combustion and engine power.
✅ CLEANS AND PROTECTS INJECTORS FOR OPTIMAL SPRAY PATTERN: Instantly eliminates harmful carbon deposits and residues that accumulate over time in injectors, restoring them to their original efficiency. By maintaining an ideal injector spray pattern, this treatment ensures precise fuel atomisation, resulting in improved combustion, lower emissions, and better fuel economy. The enhanced spray pattern promotes smoother engine operation, reducing vibrations and noise. Continuous use helps maintain the cleanliness of injectors, ensuring consistent fuel delivery and long-term engine reliability, making it an essential solution for preserving diesel engine health.
✅ LUBRICATION AND PROTECTION FOR INJECTION SYSTEMS: Provides superior lubrication to critical fuel system components, reducing wear and extending the lifespan of injectors and pumps. This protective action is especially beneficial for high-pressure injection systems, such as TDI, HDI, and other advanced diesel technologies, which require precision and durability to function effectively. By forming a protective barrier, this formulation minimises friction and enhances the smooth operation of fuel delivery components, preventing premature wear and costly repairs.
✅ RESTORES ENGINE PERFORMANCE AND PREVENTS STARTING ISSUES: Designed to bring engines back to their optimal working condition by eliminating contaminants that hinder performance. It helps to restore lost power, ensuring smooth acceleration and a steady idle. Additionally, this treatment minimises engine hesitation, misfires, and irregular combustion, providing a more reliable driving experience. By eliminating injector clogging and deposit buildup, it enhances combustion efficiency, making cold starts easier and more dependable.
✅ IMPROVES FUEL ECONOMY AND ENHANCES ENGINE RELIABILITY: Contributes to better fuel efficiency by ensuring a clean and well-maintained fuel system. With enhanced injector performance and optimised combustion, diesel engines operate more efficiently, reducing fuel consumption and operational costs. The increased fuel economy leads to lower emissions, making it an environmentally conscious choice. Additionally, this treatment enhances engine reliability by preventing unexpected breakdowns related to fuel system issues, offering peace of mind and long-term performance benefits for diesel vehicle owners.

Redex Diesel Injector Cleaner Set of 4 Bottles

Why We Love It

Improves overall vehicle performance.
Promotes environment-friendly driving.
Cost-effective fuel management.

Main Highlights

Pack of 4 Bottles of 500 ml.
Cleans injectors, reduces emissions and fuel consumption.

Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 1L Treats 1,000L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (1Litre)

Why We Love It

Transforms diesel into Super Fuel.
Ensures maximum engine performance.
Resolves potential engine problems.

Main Highlights

EXCEPTIONAL HIGH-PERFORMING SUPER DIESEL FUEL. AR6900-D MAX converts low-quality supermarket diesel into high-performing Super Diesel Fuel using a carefully selected blend of pure 2-EHN cetane improver, multiple detergents, ester lubricant, stabiliser and combustion catalyst.
HIGHLY CONCENTRATED FORMULATION with no fillers. 100% Active Ingredients and manufactured in the UK. 1ml Treats 1L of Diesel Fuel. 1L bottle treats up to 1,000L of fuel.
TRANSFORMS ALL DIESEL ENGINES GUARANTEED. Improved Cold Start, Eliminates Diesel Knock, Fuel System Cleaner, Fuel Injector Cleaner, Carbon Cleanr, DPF Cleaner, EGR Valve Cleaner, CAT Cleaner, Turbo Cleaner and Exhaust cleaner.
MAXIMUM ENGINE PERFORMANCE AND FUEL ECONOMY. This diesel additive maintains & improves engine pickup, performance and fuel economy. This diesel additive also lowers harmful exhaust emissions and exhaust particulates.
RESOLVES ENGINE PROBLEMS. Multiple detergents and post-combustion fuel-borne catalysts deliver a proprietary blend of Professional Grade Cleaning. Now you can reduce the chance of engine problems while enjoying a smoother and more responsive engine.
CLASS LEADING CETANE IMPROVER AND ESTER LUBRICANT using the highest purity 2-EHN and proprietary ester lubricant delivering below 290 on the HFRR scar wear test.
CUSTOMER SATISFACTION IS OUR PRIORITY. Feel free to contact us if you have any query regarding this diesel cleaner. All Archoil fuel cleaners include professional support and Performance and Emissions Pass Guarantee. Over a decade of success and trusted by professionals.

Fastcar 2 x Redex Diesel System Cleaner (500ml For The Price Of 250ml)

Why We Love It

Extends engine life significantly.
Enhances fuel efficiency effectively.
Bonus 500ml bottle included.

Main Highlights

Extends engine life
Improves fuel economy
100% extra free (500ml bottle)

Wynn's Total Action Diesel Cleaner – All-in-One Fuel and Exhaust System Cleaner – Protects Injectors, Valves, Turbo, DPF, EGR & Combustion Chamber – 325ml

Free Shipping

Why We Love It

Boosts Engine Performance significantly.
Promotes Better Fuel Economy.
Minimizes Exhaust Emissions effectively.

Main Highlights

✅ TRIPLE ACTION CLEANING POWER – BEFORE, DURING AND AFTER COMBUSTION: The advanced formulation of this diesel cleaner ensures a comprehensive three-phase cleaning process that begins before combustion, continues during combustion, and persists after the combustion cycle. This multi-level cleaning approach targets and eliminates carbon deposits, unburnt fuel residues, and accumulated soot within the system, which typically hinder engine efficiency and longevity. By working at every stage of the combustion process, this product offers superior internal cleansing that goes beyond traditional single-phase treatments.
✅ FULL SYSTEM COVERAGE – CLEANS THE ENTIRE FUEL AND EXHAUST SYSTEM: This total action diesel cleaner delivers deep cleaning across the entire fuel and exhaust system, including crucial and sensitive areas that are often neglected. Its powerful formula is designed to effectively clean fuel injectors, intake valves, the diesel particulate filter (DPF), exhaust gas recirculation (EGR) valves, the turbocharger, and the combustion chamber. By targeting all these critical components, the product helps maintain smoother fuel flow, optimal air intake, and efficient exhaust gas processing.
✅ 6-COMPONENT PROTECTION – PRESERVES ENGINE LONGEVITY: The formulation is engineered to provide protection for six vital components within diesel engines: the injectors, valves, DPF, EGR system, turbocharger, and combustion chamber. This protective capability not only cleans but also shields these components from further deposit build-up and corrosion. Continuous use helps prevent degradation of engine performance, reduces the likelihood of costly repairs, and contributes to extending the engine’s operational lifespan.
✅ REDUCES EXHAUST EMISSIONS – HELPS MEET ENVIRONMENTAL STANDARDS: Through its targeted cleaning action, this diesel cleaner significantly reduces harmful exhaust emissions, including particulate matter, nitrogen oxides, and unburned hydrocarbons. By restoring optimal combustion efficiency and ensuring clean injectors and emission control devices, the cleaner helps vehicles meet stringent emission regulations and environmental standards. This function is particularly valuable for high-mileage diesel engines and fleet vehicles that operate under demanding conditions.
✅ IMPROVES FUEL ECONOMY – RESTORES POWER AND REDUCES CONSUMPTION: By removing harmful deposits and improving the performance of key components, this product contributes to a noticeable improvement in fuel economy. Clean injectors and combustion chambers allow for more efficient fuel burning, reducing overall diesel consumption. Restored turbocharger and EGR valve functions further enhance airflow and engine breathing, leading to smoother acceleration and better throttle response. These enhancements help maximise the energy derived from each litre of diesel, making it an excellent solution for those seeking to maintain peak fuel efficiency and minimise operational costs over the long term.

Cataclean Diesel Fuel & Exhaust Cleaner Catalytic Converter Valve & Injector Cleaner 500ml

22% OffFree Shipping

Why We Love It

Optimizes engine performance.
Reduces emissions significantly.
Enhances fuel economy.

Main Highlights

VEHICLE MAINTENANCE > Safe for all engines, Cataclean original 8-in-1 engine cleaning system has been scientifically formulated to help your vehicle engine run better and last longer. Adding Cataclean as part of your regular vehicle maintenance routine to remove carbon build up improves fuel economy, reduce emissions, restores performance and protects catalytic converters
CLEANS & PROTECTS > Cataclean cleans, restores & protects the fuel tank and lines, fuel injectors, catalytic convertors, diesel particulate filters (DPF), exhaust gas recirculation valves, oxygen sensors, combustion chambers & intake and exhaust valves
REDUCE EMISSIONS > Regular use of Cataclean engine cleaning system can reduce emissions by up to 60% which can help prevent to MOT emissions failures and reduce air pollution
ENGINE PERFORMANCE > Using Cataclean fuel system cleaner restores engine performance, reduces vehicle maintenance costs and reduces fuel consumption, improving MPG fuel efficiency
USAGE > Add 500ml of Cataclean fuel additive per 15 litres of fuel every three months for optimum results

Liqui Moly 5156 Pro-Line Diesel System Cleaner 500ml

Why We Love It

Reduces pollutant emissions efficiently.
Suitable for all diesels.
Enhances fuel system maintenance.

Main Highlights

Reduces the pollutant emissions, optimizing smoke opacity before the emissions test. Successfully tested in international testbench investigations.
Suitable for all diesel engine vehicles including those with Common Rail and pumped-jet injection systems.
Add to the tank during each inspection and after carrying out repairs on the fuel system. To eliminate problems, we recommend mixing diesel system cleaner with fuel during refueling over a period of approximately 2,000 km.

STP Diesel Fuel Additive Twin Pack

23% Off

Why We Love It

Cleans and restores performance.
Lowers exhaust emissions.
Reduces rough idling.

Main Highlights

STP Diesel Bundle contains STP Diesel Injector Cleaner 200ml and STP Ultra 5-in-1 Diesel System Cleaner 400ml
Cleans & Unclogs: Powerful STP Diesel Injector Cleaner clears dirty injectors with just one treatment
Restores Performance: STP Ultra 5-in-1 System Cleaner is our most advanced diesel formula, helping to remove deposits and clear dirty injectors
Lowers Emissions: A cleaner engine may mean less exhaust emissions and lower fuel consumption
For All Diesel Engines: Suitable for all diesel engines including DI, IDI and common rail, and catalytic converters
Quick & Easy: Simply pour the entire bottle of STP Diesel Injector Cleaner or STP Diesel System Cleaner into a full tank
Reduces Rough Idling: For a smoother engine experience

Comma DDTOX400M 400ml Diesel D-Tox Solution

Free Shipping

Why We Love It

Maximises engine power.
Improves acceleration.
Premium product.

Main Highlights

Info: Maximises engine power. Info: Optimises BHP.
Info: Improves acceleration
Info: Reduces risk of non-starting
Info: Increases overall performance
Premium Product

8.9

Excellent

We scanned 383 products

We reviewed these offers relevant to the Fuel System Cleaner Diesel within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Archoil, Wynn's, Redex, Fastcar, Cataclean, Liqui Moly, STP, Comma, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Fuel System Cleaner Diesel in the market, we considered we took a deep dive into 1916 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Archoil AR6400-D MAX Pro DPF Cleaner Diesel Fuel System, Diesel Injector Cleaner, Turbo, CAT Cleaner Concentrate - High Strength Carbon Removal & Exhaust Emissions Reduction for MOT Pass (400ml). We love many things about this product by Archoil. What sets it apart from the competition is Improves fuel economy significantly, Ensures thorough engine cleaning, Offers full ester lubrication.
The best value product for most shoppers and where user satisfaction is continuously the highest is WYNNS Professional Diesel Injector Cleaner - One-Tank Solution for Optimal Fuel System Performance - Cleans & Lubricates Injectors - Improves Fuel Economy & Engine Efficiency - 500ml by Wynn's based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Fuel System Cleaner Diesel and the best cost-to-value ratio is STP Diesel Fuel Additive Twin Packat STP with a 23% discount.
Our list of the best Fuel System Cleaner Diesel is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Fuel System Cleaner Diesel in The UK

Related Deals You Might Like for Fuel System Cleaner Diesel

Redex Diesel Fuel System Cleaner 250ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Diesel Engines, Suitable For Hybrids

STP Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

Wynn's Extreme Diesel System Cleaner - Deep Cleaning Engine Treatment - Restores Fuel Economy & Reduces Emissions - Prevents Turbo, EGR Valve & DPF Issues - 325ml

STP Diesel High Milage Injector Cleaner 200 ml, Cleans and Protects your Engine for 300 miles, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

Carlube QID300 Diesel Injector Cleaner 300ml regular

Redex DPF Cleaner Diesel, DPF Diesel Particulate Filter Cleaner To Clear Soot Blockages Quickly & Avoid Costly Repairs, Hassle-Free DPF Cleaner To Prevent Clogging & Reduce Emissions, 250ml

STP Ultra 5 in 1 Petrol System Cleaner 400ml, Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

Redex RADD2201A Diesel fuel System Cleaner, 500 ml

Wynn's High Performance Diesel Fuel System Treatment - Enhances Combustion, Improves Acceleration, Reduces Fuel Consumption & Black Smoke - 500ml

Wynn's Diesel Injector Cleaner - Reduces Knocking & Black Smoke - Protects Fuel System from Corrosion - Safe for EGR, Turbo, DPF & SCR - 325ml

We scanned 383 products

We concluded that: