Best Diesel Additives of 2026

Last updated on 01/04/2026

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Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L

Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L

Optimized engine operation guaranteed.
Restores engine power instantly.
Delivers ultra-fast results.

Main Highlights

Optimised engine operation
Restoration of engine power
Optimisation of fuel consumption
Improved driver experience
Ultra-fast results!

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Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L

Optimized engine operation guaranteed.
Restores engine power instantly.
Delivers ultra-fast results.

Main Highlights

Optimised engine operation
Restoration of engine power
Optimisation of fuel consumption
Improved driver experience
Ultra-fast results!

Value for Money

Millers Oils 2 X Diesel Power Ecomax 500ml, Fuel Additive Treatment

Millers Oils 2 X Diesel Power Ecomax 500ml, Fuel Additive Treatment

Boosts vehicle performance significantly.
Ensure cleaner, efficient combustion.
Reliable brand in auto accessories.

Main Highlights

Millers Oils 2 X Diesel Power Ecomax 500ml Fuel Additive Treatment
Brand : Millers Oils
Product type: AUTO ACCESSORY

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Millers Oils 2 X Diesel Power Ecomax 500ml, Fuel Additive Treatment

Boosts vehicle performance significantly.
Ensure cleaner, efficient combustion.
Reliable brand in auto accessories.

Main Highlights

Millers Oils 2 X Diesel Power Ecomax 500ml Fuel Additive Treatment
Brand : Millers Oils
Product type: AUTO ACCESSORY

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)

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)

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.

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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)

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.

Hydra DPB-100 Diesel Power Blast - Diesel Fuel System Cleaner | Diesel Injector Cleaner with Diesel Fuel Additive | 1 Litre Treats 1,000L

Hydra DPB-100 Diesel Power Blast - Diesel Fuel System Cleaner | Diesel Injector Cleaner with Diesel Fuel Additive | 1 Litre Treats 1,000L

Boosts fuel and engine performance.
Ideal for extensive diesel use.
Ensures customer satisfaction guarantee.

Main Highlights

Inexpensive Quality Product: Hydra DBP-100 is a diesel additive that helps in Diesel cleaning. This fuel injector cleaner turns the cheapest fuel into premium fuel, but at a much better cost than buying at a filling station. Perfect for cold starting, smoother engine with better pick-up with reduced diesel knock, smoke and harmful emissions.
Extensive use: DBP-100 DIESEL FUEL INJECTOR CLEANER is for diesel engines. It is a diesel cleaner and fuel stabiliser, that contains cetane booster, and lubricants. It also contains detergents that clean fuel lines, pumps, injectors, fantastic turbo diesel cleaner, EGR valves, helps keep DPF clean
Exceptional Performance: Hydra DBP-100 is a high performance cleaning diesel Injector additive. Hydra uses polyetheramine, which creates the best diesel injector cleaner; that removes existing carbon deposits and prevents new formation. It helps restore engine performance and power to as new.
Perfect Lubricant: The dpf cleaner diesel and regenerator helps in decreased fuel pump, injector and cylinder wear issues. It is low in sulphur and works at low temperatures. The diesel injector cleaner also helps to improve fuel economy. Giving an HFRR wear profile of less than 300.
Customer Satisfaction: Hydra DBP-100 ensure 100% customer satisfaction for all their products. In case of any query related to the diesel injector cleaner, feel free to contact us. We will try providing a solution to our best capacity.

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Hydra DPB-100 Diesel Power Blast - Diesel Fuel System Cleaner | Diesel Injector Cleaner with Diesel Fuel Additive | 1 Litre Treats 1,000L

Boosts fuel and engine performance.
Ideal for extensive diesel use.
Ensures customer satisfaction guarantee.

Main Highlights

Inexpensive Quality Product: Hydra DBP-100 is a diesel additive that helps in Diesel cleaning. This fuel injector cleaner turns the cheapest fuel into premium fuel, but at a much better cost than buying at a filling station. Perfect for cold starting, smoother engine with better pick-up with reduced diesel knock, smoke and harmful emissions.
Extensive use: DBP-100 DIESEL FUEL INJECTOR CLEANER is for diesel engines. It is a diesel cleaner and fuel stabiliser, that contains cetane booster, and lubricants. It also contains detergents that clean fuel lines, pumps, injectors, fantastic turbo diesel cleaner, EGR valves, helps keep DPF clean
Exceptional Performance: Hydra DBP-100 is a high performance cleaning diesel Injector additive. Hydra uses polyetheramine, which creates the best diesel injector cleaner; that removes existing carbon deposits and prevents new formation. It helps restore engine performance and power to as new.
Perfect Lubricant: The dpf cleaner diesel and regenerator helps in decreased fuel pump, injector and cylinder wear issues. It is low in sulphur and works at low temperatures. The diesel injector cleaner also helps to improve fuel economy. Giving an HFRR wear profile of less than 300.
Customer Satisfaction: Hydra DBP-100 ensure 100% customer satisfaction for all their products. In case of any query related to the diesel injector cleaner, feel free to contact us. We will try providing a solution to our best capacity.

Dipetane 5L Fuel Additive | Improve Fuel Economy | Reduce Emmisions | Helps keep DPF Clean Diesel and Petrol | Flush and clean Engine, Injector and EGR valve

Dipetane 5L Fuel Additive | Improve Fuel Economy | Reduce Emmisions | Helps keep DPF Clean Diesel and Petrol | Flush and clean Engine, Injector and EGR valve

No harmful chemicals involved.
Environmentally safe composition.
Pure and clean performance.

Main Highlights

✅ [ IMPROVES FUEL ECONOMY ] Increase fuel economy by up to 10% due to Dipetane enabling a more efficient and complete fuel burn saving you money.
✅ [ AIDS DPF CLEAN ] Dipetane is a complete fuel system cleaner it helps keep DPF and Catalytic Convertors clean. Also cleans and keeps clean; valves, pistons, injectors, sensors and EGR valves. Helps engine last longer giving complete Engine Flush. Works alongside Ad Blue and compliments the AdBlue benefits.
✅ [ LESS SMOKE ] Dipetane will remove soot and other internal combustion deposits from the engine through the complete combustion process created by Dipetane meaning less exhaust smoke and restores performance.
✅ [ FOR ALL ENGINES ] Ideal for all vehicles, Diesel, Petrol or kerosene engines, our unique fuel treatment upgrades all fuels without additives. No detergents, no cetane enhancers, no octane boosters, and no heavy metals. Simply pour it into your fuel tank, and it gets to work right away.
✅ [ REDUCE EMISSIONS] Increases the air/fuel mixing rate, creates cleaner combustion, resulting in a substantial reduction in harmful emissions by up to 25%, positively contributing to the environment with less greenhouse gases entering the atmosphere and helping you pass your MOT.

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Dipetane 5L Fuel Additive | Improve Fuel Economy | Reduce Emmisions | Helps keep DPF Clean Diesel and Petrol | Flush and clean Engine, Injector and EGR valve

No harmful chemicals involved.
Environmentally safe composition.
Pure and clean performance.

Main Highlights

✅ [ IMPROVES FUEL ECONOMY ] Increase fuel economy by up to 10% due to Dipetane enabling a more efficient and complete fuel burn saving you money.
✅ [ AIDS DPF CLEAN ] Dipetane is a complete fuel system cleaner it helps keep DPF and Catalytic Convertors clean. Also cleans and keeps clean; valves, pistons, injectors, sensors and EGR valves. Helps engine last longer giving complete Engine Flush. Works alongside Ad Blue and compliments the AdBlue benefits.
✅ [ LESS SMOKE ] Dipetane will remove soot and other internal combustion deposits from the engine through the complete combustion process created by Dipetane meaning less exhaust smoke and restores performance.
✅ [ FOR ALL ENGINES ] Ideal for all vehicles, Diesel, Petrol or kerosene engines, our unique fuel treatment upgrades all fuels without additives. No detergents, no cetane enhancers, no octane boosters, and no heavy metals. Simply pour it into your fuel tank, and it gets to work right away.
✅ [ REDUCE EMISSIONS] Increases the air/fuel mixing rate, creates cleaner combustion, resulting in a substantial reduction in harmful emissions by up to 25%, positively contributing to the environment with less greenhouse gases entering the atmosphere and helping you pass your MOT.

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

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

Boosts fuel system cleaning.
Recovers peak engine performance.
Offers superior engine protection.

Main Highlights

What You'll Get - 400 ml Diesel Fuel System Cleaner
Concentrated Cleaning Power - Cleans and conditions the entire fuel delivery system in one tank
Restores Power and Performance - Recovers peak engine performance by removing harmful deposits
Protects Your Engine - Reduces friction and protects key engine parts from wear and corrosion
Reduces Diesel consumption and exhaust emissions - promotes better fuel economy

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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

Boosts fuel system cleaning.
Recovers peak engine performance.
Offers superior engine protection.

Main Highlights

What You'll Get - 400 ml Diesel Fuel System Cleaner
Concentrated Cleaning Power - Cleans and conditions the entire fuel delivery system in one tank
Restores Power and Performance - Recovers peak engine performance by removing harmful deposits
Protects Your Engine - Reduces friction and protects key engine parts from wear and corrosion
Reduces Diesel consumption and exhaust emissions - promotes better fuel economy

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

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

Restores lost engine performance.
Reduces harmful exhaust emissions.
Protects the fuel system.

Main Highlights

✅ CLEANS THE ENTIRE DIESEL FUEL SYSTEM: Effectively removes dirt, carbon deposits, and other harmful residues that accumulate within the fuel system over time. Ensures a cleaner and more efficient combustion process by thoroughly cleaning key components such as the fuel pump, diesel injectors, and intake valves. By dissolving stubborn contaminants, it helps prevent clogging and improves the overall efficiency of the fuel delivery system. Designed to work in a single treatment, providing a powerful 'one tank' clean-up that restores optimal fuel system functionality.
✅ RESTORES FUEL ECONOMY: This product helps optimise fuel consumption by ensuring a cleaner and more efficient fuel-burning process. By eliminating harmful deposits and improving fuel atomisation, it contributes to a smoother and more complete combustion cycle. This results in less fuel waste and improved miles per gallon, allowing for greater cost savings over time. By restoring lost performance, the cleaner enables engines to operate at peak efficiency, reducing unnecessary fuel consumption caused by inefficient combustion. Ideal for vehicles experiencing a decline in fuel economy due to carbon build-up and fuel injector blockages.
✅ PREVENTS PROBLEMS WITH TURBO, EGR VALVE & DPF: Designed to maintain the cleanliness of crucial engine components such as the turbocharger, Exhaust Gas Recirculation (EGR) valve, and Diesel Particulate Filter (DPF). Helps prevent carbon and soot build-up, which can lead to blockages and reduced performance. By keeping these components clean, it enhances engine efficiency and reduces the risk of costly repairs. Supports proper airflow and exhaust circulation, ensuring smooth turbo operation and reducing emissions. Helps to minimise common diesel engine issues such as sluggish acceleration, excessive smoke, and reduced power caused by carbon deposits.
✅ ELIMINATES AND AVOIDS STARTING PROBLEMS: Effectively addresses hard starting issues caused by contaminated fuel or clogged injectors. Ensures a smoother ignition process by restoring proper fuel flow and combustion efficiency. Helps eliminate rough idling, misfires, and hesitation that often result from a dirty fuel system. By cleaning the fuel injectors and fuel pump, it improves cold starts and reduces strain on the battery and starter motor. Ideal for vehicles that experience difficulties starting due to carbon deposits and injector blockages. Consistent use helps prevent future starting problems and maintains reliable engine operation under various driving conditions.
✅ RESTORES LOST ENGINE PERFORMANCE & REDUCES EMISSIONS: The Extreme diesel system cleaner revitalises the engine power by cleaning and protecting critical fuel system components. Improves throttle response, acceleration, and overall drivability by ensuring an uninterrupted fuel supply. Reduces harmful exhaust emissions by promoting cleaner combustion and minimising unburned fuel residues. Helps the engine run more smoothly and quietly, reducing vibrations and improving overall efficiency. Supports compliance with emission standards by lowering carbon monoxide, nitrogen oxides, and particulate matter in exhaust gases.

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

Restores lost engine performance.
Reduces harmful exhaust emissions.
Protects the fuel system.

Main Highlights

✅ CLEANS THE ENTIRE DIESEL FUEL SYSTEM: Effectively removes dirt, carbon deposits, and other harmful residues that accumulate within the fuel system over time. Ensures a cleaner and more efficient combustion process by thoroughly cleaning key components such as the fuel pump, diesel injectors, and intake valves. By dissolving stubborn contaminants, it helps prevent clogging and improves the overall efficiency of the fuel delivery system. Designed to work in a single treatment, providing a powerful 'one tank' clean-up that restores optimal fuel system functionality.
✅ RESTORES FUEL ECONOMY: This product helps optimise fuel consumption by ensuring a cleaner and more efficient fuel-burning process. By eliminating harmful deposits and improving fuel atomisation, it contributes to a smoother and more complete combustion cycle. This results in less fuel waste and improved miles per gallon, allowing for greater cost savings over time. By restoring lost performance, the cleaner enables engines to operate at peak efficiency, reducing unnecessary fuel consumption caused by inefficient combustion. Ideal for vehicles experiencing a decline in fuel economy due to carbon build-up and fuel injector blockages.
✅ PREVENTS PROBLEMS WITH TURBO, EGR VALVE & DPF: Designed to maintain the cleanliness of crucial engine components such as the turbocharger, Exhaust Gas Recirculation (EGR) valve, and Diesel Particulate Filter (DPF). Helps prevent carbon and soot build-up, which can lead to blockages and reduced performance. By keeping these components clean, it enhances engine efficiency and reduces the risk of costly repairs. Supports proper airflow and exhaust circulation, ensuring smooth turbo operation and reducing emissions. Helps to minimise common diesel engine issues such as sluggish acceleration, excessive smoke, and reduced power caused by carbon deposits.
✅ ELIMINATES AND AVOIDS STARTING PROBLEMS: Effectively addresses hard starting issues caused by contaminated fuel or clogged injectors. Ensures a smoother ignition process by restoring proper fuel flow and combustion efficiency. Helps eliminate rough idling, misfires, and hesitation that often result from a dirty fuel system. By cleaning the fuel injectors and fuel pump, it improves cold starts and reduces strain on the battery and starter motor. Ideal for vehicles that experience difficulties starting due to carbon deposits and injector blockages. Consistent use helps prevent future starting problems and maintains reliable engine operation under various driving conditions.
✅ RESTORES LOST ENGINE PERFORMANCE & REDUCES EMISSIONS: The Extreme diesel system cleaner revitalises the engine power by cleaning and protecting critical fuel system components. Improves throttle response, acceleration, and overall drivability by ensuring an uninterrupted fuel supply. Reduces harmful exhaust emissions by promoting cleaner combustion and minimising unburned fuel residues. Helps the engine run more smoothly and quietly, reducing vibrations and improving overall efficiency. Supports compliance with emission standards by lowering carbon monoxide, nitrogen oxides, and particulate matter in exhaust gases.

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

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

Maximizes diesel engine performance.
Increases fuel economy significantly.
Prolongs engine life effectively.

Main Highlights

REDEX DIESEL FUEL ADDITIVE: Use Redex Diesel Treatment Fuel Additive, the specialist diesel system cleaner, lab designed to maximise performance and offer potential increases in fuel economy for your diesel engine
IMPROVE ENGINE LIFE: This incredible Diesel Injector Cleaner removes harmful deposits that build up in the fuel system, which will help prolong your engine's life, and improve day-to-day performance Don't settle for anything less
SAVE FUEL & REDUCE EMISSIONS: By cleaning out those harmful deposits, Redex Diesel Additive and Cleaner will help your car become more fuel efficient, meaning you will reduce your emissions and use less fuel
EASY TO USE DIESEL CLEANER: Pour one shot of Redex Fuel Additive directly into your fuel tank It can be used as often as you like to keep your engine running well We recommend using a shot in each tank
OVER 100 YEARS OF EXCELLENCE: At Redex, we have spent over a century offering solutions to your car troubles to make your life easier and stress free If you want the right tools to maintain, repair or clean your vehicle, we have what you need
Redex
Redex Diesel 250ml
Accessories

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

Maximizes diesel engine performance.
Increases fuel economy significantly.
Prolongs engine life effectively.

Main Highlights

REDEX DIESEL FUEL ADDITIVE: Use Redex Diesel Treatment Fuel Additive, the specialist diesel system cleaner, lab designed to maximise performance and offer potential increases in fuel economy for your diesel engine
IMPROVE ENGINE LIFE: This incredible Diesel Injector Cleaner removes harmful deposits that build up in the fuel system, which will help prolong your engine's life, and improve day-to-day performance Don't settle for anything less
SAVE FUEL & REDUCE EMISSIONS: By cleaning out those harmful deposits, Redex Diesel Additive and Cleaner will help your car become more fuel efficient, meaning you will reduce your emissions and use less fuel
EASY TO USE DIESEL CLEANER: Pour one shot of Redex Fuel Additive directly into your fuel tank It can be used as often as you like to keep your engine running well We recommend using a shot in each tank
OVER 100 YEARS OF EXCELLENCE: At Redex, we have spent over a century offering solutions to your car troubles to make your life easier and stress free If you want the right tools to maintain, repair or clean your vehicle, we have what you need
Redex
Redex Diesel 250ml
Accessories

STP Diesel Fuel Additive Treatment Bundle, Includes Diesel Injector Cleaner and Ultra 5-in-1 Diesel System Cleaner, Cleans Injectors and Restores Performance For A Smoother Engine, Made in the UK

STP Diesel Fuel Additive Treatment Bundle, Includes Diesel Injector Cleaner and Ultra 5-in-1 Diesel System Cleaner, Cleans Injectors and Restores Performance For A Smoother Engine, Made in the UK

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

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STP Diesel Fuel Additive Treatment Bundle, Includes Diesel Injector Cleaner and Ultra 5-in-1 Diesel System Cleaner, Cleans Injectors and Restores Performance For A Smoother Engine, Made in the UK

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

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

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

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.

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

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.

We scanned 895 products

We reviewed these offers relevant to the Diesel Additives 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 Wynn's, Millers Oils, Archoil, HYDRA, DIPETANE, STP, Redex, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Diesel Additives in the market, we considered we took a deep dive into 4476 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 Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L. We love many things about this product by Wynn's. What sets it apart from the competition is Optimized engine operation guaranteed, Restores engine power instantly, Delivers ultra-fast results.
The best value product for most shoppers and where user satisfaction is continuously the highest is Millers Oils 2 X Diesel Power Ecomax 500ml, Fuel Additive Treatment by Millers Oils based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Diesel Additives and the best cost-to-value ratio is Redex Diesel Fuel System Cleaner 250ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fuel Economy Fuel Additives For Diesel Engines, Suitable For Hybridsat Redex with a 30% discount.
Our list of the best Diesel Additives 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.