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10 Best Diesel Fuel System Cleaner in The UK

Last updated on 07/07/2025
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1
9.8
Exceptional
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WYNNS Professional Diesel Injector Cleaner - One-Tank Solution for Optimal Fuel System Performance - Cleans & Lubricates Injectors - Improves Fuel Economy & Engine Efficiency - 500ml
Wynn's
WYNNS Professional Diesel Injector Cleaner - One-Tank Solution for Optimal Fuel System Performance - Cleans & Lubricates Injectors - Improves Fuel Economy & Engine Efficiency - 500ml
3% 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.
9.8
Exceptional
Save 3%
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Best Value
2
9.7
Exceptional
Save 9%
Cataclean Diesel Fuel & Exhaust Cleaner Catalytic Converter Valve & Injector Cleaner 500ml
Cataclean
Cataclean Diesel Fuel & Exhaust Cleaner Catalytic Converter Valve & Injector Cleaner 500ml
9% 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
9.7
Exceptional
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3
9.6
Superb
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STP Diesel Fuel Additive Twin Pack
STP
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
9.6
Superb
Save 23%
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4
9.4
Superb
Fastcar 2 x Redex Diesel System Cleaner (500ml For The Price Of 250ml)
Fastcar
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)
9.4
Superb
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5
9.2
Superb
Liqui Moly 5156 Pro-Line Diesel System Cleaner 500ml
Liqui Moly
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.
9.2
Superb
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6
9.0
Superb
Comma DDTOX400M 400ml Diesel D-Tox Solution
Comma
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
9.0
Superb
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7
8.9
Excellent
Wynn's Total Action Diesel Cleaner – All-in-One Fuel and Exhaust System Cleaner – Protects Injectors, Valves, Turbo, DPF, EGR & Combustion Chamber – 325ml
Wynn's
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.
8.9
Excellent
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8
8.9
Excellent
Carlube Diesel Injector Cleaner, Increases Power Economy
Carlube
Carlube Diesel Injector Cleaner, Increases Power Economy
Why We Love It
  • Improves and protects fuel systems.
  • Reduces unwanted deposits significantly.
  • Enhances overall fuel economy.
Main Highlights
  • Cleans and protects entire fuel systems
  • Reduces inlet valve and injector deposits
  • Helps improve fuel economy
  • Helps prolong the life of fuel systems
8.9
Excellent
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9
8.8
Excellent
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)
Archoil
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.
8.8
Excellent
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10
8.8
Excellent
Save 12%
Wynn's High Performance Diesel Fuel System Treatment - Enhances Combustion, Improves Acceleration, Reduces Fuel Consumption & Black Smoke - 500ml
Wynn's
Wynn's High Performance Diesel Fuel System Treatment - Enhances Combustion, Improves Acceleration, Reduces Fuel Consumption & Black Smoke - 500ml
12% OffFree Shipping
Why We Love It
  • Improves engine performance instantly.
  • Reduces fuel consumption effectively.
  • Protects against oxidation.
Main Highlights
  • ✅ IMPROVES COMBUSTION FOR OPTIMAL ENGINE PERFORMANCE: This high-performance diesel treatment is formulated to enhance combustion efficiency immediately upon use. The powerful blend of active ingredients optimises the fuel-to-air ratio, allowing for a cleaner and more complete burn inside the engine. As a result, the engine runs more smoothly and efficiently, leading to improved throttle response and faster acceleration. Enhanced combustion also contributes to a reduction in harmful emissions and particulate matter, resulting in a cleaner exhaust. This makes it particularly effective for vehicles that operate under demanding conditions, where peak engine performance is essential.
  • ✅ REDUCES FUEL CONSUMPTION FOR COST-EFFICIENT DRIVING: By promoting more complete combustion, this treatment directly contributes to a reduction in fuel consumption. It maximises the energy extracted from each litre of diesel, helping the engine to deliver better mileage without compromising performance. Whether used in long-distance driving or frequent short trips, this product supports fuel efficiency by optimising the way diesel is burned. The result is lower fuel costs over time and less frequent refuelling. Regular application helps maintain this improved fuel economy, making it a smart choice for fuel-conscious drivers and fleet operators alike.
  • ✅ REDUCES BLACK SMOKE FOR CLEANER EMISSIONS: This advanced diesel system treatment addresses one of the most visible signs of inefficient fuel use: black smoke. By improving the combustion process, the treatment drastically reduces unburned hydrocarbons that manifest as dark exhaust. This contributes not only to a cleaner vehicle but also to a more environmentally friendly operation. Vehicles treated with this formula emit noticeably less smoke, which can be a critical factor in passing emission tests or complying with urban environmental regulations.
  • ✅ PROTECTS THE FUEL SYSTEM FROM OXIDATION AND CORROSION: The formula includes special additives designed to shield the fuel system from the damaging effects of oxidation and corrosion. Diesel engines are particularly susceptible to water contamination and fuel degradation, which can lead to rust, corrosion, and the formation of sludge within the fuel tank and injection system. This treatment provides a protective barrier that inhibits these processes, extending the lifespan of fuel components such as injectors, pumps, and lines. It is especially beneficial in vehicles that are not used regularly, where stagnant diesel may pose a greater risk.
  • ✅ TREATS UP TO 70 LITRES WITH ONE 500ML BOTTLE: The concentrated nature of this formula ensures that a single 500ml bottle is sufficient to treat up to 70 litres of diesel fuel. This high-yield ratio makes it a cost-effective solution for those looking to maintain peak engine performance without frequent applications. Suitable for cars, vans, trucks, and other diesel-powered machinery, this treatment integrates seamlessly into routine maintenance schedules. Its easy-to-use format allows it to be poured directly into the fuel tank, ensuring fast action and visible results.
8.8
Excellent
Save 12%
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