Best Fuel Additives For Petrol Engines of 2026

Last updated on 27/05/2026
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1
Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 2 x 500ml
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Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 2 x 500ml

Cataclean
Why we love it
  • Improves fuel economy significantly.
  • Enhances engine performance.
  • Reduces emissions efficiently.
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
Show More
9.8
Exceptional
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9.8
Exceptional
Cataclean

Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 2 x 500ml

Why we love it
  • Improves fuel economy significantly.
  • Enhances engine performance.
  • Reduces emissions efficiently.
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
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Value for Money
2
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
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LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1

Liqui Moly
14% Off
Why we love it
  • Smoother engine performance guaranteed.
  • Certified effectiveness with TÜV Thüringen.
  • Extends engine's lifespan significantly.
Main Highlights
  • SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thermal resilience. Additive ensures smoother-running engine, extending the engine’s lifespan. Can be used with manual & automatic transmissions. Not suitable for use with wet clutches.
  • LOWER FUEL CONSUMPTION and diminished emission of pollutants due to smoother engine operation.
  • EASY TO ADD DURING OIL CHANGES: The 300 ml bottle is sufficient for up to 5 liters of engine oil. Shake well before use and add to fresh oil. Can be mixed with all gear & engine oils on the market. Long-lasting performance, up to 50,000 km.
  • CERTIFIED EFFECTIVENESS proven by TÜV Thüringen: Chemical components in Cera Tec smooth out rough surfaces, the ceramic particles fill in uneven surface imperfections. Prevents direct contact of all metal parts, reducing friction and wear & tear. Turbo & Cat tested.
  • EVERYTHING THAT DRIVES WORKS BETTER WITH LIQUI MOLY: We manufacture over 4,000 products: engine oils, additives, vehicle care, chemical servicing and repair, adhesives and sealing products. Our products are currently distributed to over 150 countries worldwide. They are popular everywhere, ensuring a superior driving experience and improved engine performance.
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9.6
Superb
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9.6
Superb
Liqui Moly

LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1

14% Off
Why we love it
  • Smoother engine performance guaranteed.
  • Certified effectiveness with TÜV Thüringen.
  • Extends engine's lifespan significantly.
Main Highlights
  • SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thermal resilience. Additive ensures smoother-running engine, extending the engine’s lifespan. Can be used with manual & automatic transmissions. Not suitable for use with wet clutches.
  • LOWER FUEL CONSUMPTION and diminished emission of pollutants due to smoother engine operation.
  • EASY TO ADD DURING OIL CHANGES: The 300 ml bottle is sufficient for up to 5 liters of engine oil. Shake well before use and add to fresh oil. Can be mixed with all gear & engine oils on the market. Long-lasting performance, up to 50,000 km.
  • CERTIFIED EFFECTIVENESS proven by TÜV Thüringen: Chemical components in Cera Tec smooth out rough surfaces, the ceramic particles fill in uneven surface imperfections. Prevents direct contact of all metal parts, reducing friction and wear & tear. Turbo & Cat tested.
  • EVERYTHING THAT DRIVES WORKS BETTER WITH LIQUI MOLY: We manufacture over 4,000 products: engine oils, additives, vehicle care, chemical servicing and repair, adhesives and sealing products. Our products are currently distributed to over 150 countries worldwide. They are popular everywhere, ensuring a superior driving experience and improved engine performance.
Show More
3
Wynn's Formula Gold High-Performance Petrol System Treatment - Enhances Engine Efficiency - Improves Acceleration & Reduces Noise - Cleans & Protects Fuel Injection System - 500ml
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Wynn's Formula Gold High-Performance Petrol System Treatment - Enhances Engine Efficiency - Improves Acceleration & Reduces Noise - Cleans & Protects Fuel Injection System - 500ml

Wynn's
Why we love it
  • Elevates engine performance significantly.
  • Ensures efficient fuel consumption.
  • Helps pass emission tests.
Main Highlights
  • ✅ HIGH-PERFORMANCE PETROL ENGINE BOOSTER: Wynn's Formula Gold High-Performance Petrol System Treatment is designed to enhance engine performance by improving combustion immediately. A more efficient combustion process results in better acceleration, smoother engine operation, and reduced engine noise. By optimising fuel burn, the treatment contributes to a more responsive driving experience and minimises power loss over time. Ensuring a cleaner and more effective fuel burn not only improves engine longevity but also helps maintain optimal performance levels, making it an ideal addition to any vehicle maintenance routine.
  • ✅ FUEL EFFICIENCY & CONSUMPTION REDUCTION: This advanced formula actively works to lower petrol consumption by optimising the fuel system's efficiency. By cleaning and maintaining fuel injectors, the treatment ensures a precise air-fuel mixture, which directly leads to improved mileage and reduced fuel wastage. The result is a more cost-effective driving experience with fewer trips to the petrol pumps. Over time, continuous use helps prevent build-up in the injection system, allowing the engine to operate with maximum efficiency, reducing the strain on fuel components and prolonging their lifespan.
  • ✅ INJECTION SYSTEM CLEANING & PROTECTION: A clean fuel system is essential for maintaining vehicle performance and efficiency. Wynn's Formula Gold Petrol System Treatment actively cleans and protects the entire fuel injection system, preventing deposits from forming on critical components such as injectors, intake valves, and combustion chambers. A well-maintained injection system allows for smoother fuel delivery, preventing engine hesitation and misfires. By continuously safeguarding these components, the treatment ensures that the vehicle maintains optimal power output while extending the life of the fuel system.
  • ✅ REDUCTION OF HARMFUL EMISSIONS: Designed to contribute to a cleaner environment, this treatment significantly reduces harmful exhaust emissions such as carbon monoxide (CO) and hydrocarbons (HC). By promoting more complete combustion, the formula helps decrease the production of toxic gases, making it an ideal solution for those aiming to meet stringent emissions regulations. Regular use can assist in passing MOT emissions tests by lowering pollution levels and ensuring the engine operates within regulatory standards. A cleaner exhaust system means less impact on the environment and improved air quality.
  • ✅ SAFE FOR CATALYTIC CONVERTERS & ALL PETROL ENGINES: Wynn's Formula Gold Petrol System Treatment is formulated to be completely safe for use in all petrol engines, including those equipped with catalytic converters and modern exhaust after-treatment systems. Unlike harsh additives that can damage sensitive engine components, this treatment is carefully engineered to enhance performance without causing harm. Suitable for both older and newer vehicles, it provides a versatile solution for maintaining engine efficiency. For optimal performance, it is recommended to use this treatment in every third tank of fuel to continuously benefit from its cleaning and protective properties.
Show More
9.4
Superb
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9.4
Superb
Wynn's

Wynn's Formula Gold High-Performance Petrol System Treatment - Enhances Engine Efficiency - Improves Acceleration & Reduces Noise - Cleans & Protects Fuel Injection System - 500ml

Why we love it
  • Elevates engine performance significantly.
  • Ensures efficient fuel consumption.
  • Helps pass emission tests.
Main Highlights
  • ✅ HIGH-PERFORMANCE PETROL ENGINE BOOSTER: Wynn's Formula Gold High-Performance Petrol System Treatment is designed to enhance engine performance by improving combustion immediately. A more efficient combustion process results in better acceleration, smoother engine operation, and reduced engine noise. By optimising fuel burn, the treatment contributes to a more responsive driving experience and minimises power loss over time. Ensuring a cleaner and more effective fuel burn not only improves engine longevity but also helps maintain optimal performance levels, making it an ideal addition to any vehicle maintenance routine.
  • ✅ FUEL EFFICIENCY & CONSUMPTION REDUCTION: This advanced formula actively works to lower petrol consumption by optimising the fuel system's efficiency. By cleaning and maintaining fuel injectors, the treatment ensures a precise air-fuel mixture, which directly leads to improved mileage and reduced fuel wastage. The result is a more cost-effective driving experience with fewer trips to the petrol pumps. Over time, continuous use helps prevent build-up in the injection system, allowing the engine to operate with maximum efficiency, reducing the strain on fuel components and prolonging their lifespan.
  • ✅ INJECTION SYSTEM CLEANING & PROTECTION: A clean fuel system is essential for maintaining vehicle performance and efficiency. Wynn's Formula Gold Petrol System Treatment actively cleans and protects the entire fuel injection system, preventing deposits from forming on critical components such as injectors, intake valves, and combustion chambers. A well-maintained injection system allows for smoother fuel delivery, preventing engine hesitation and misfires. By continuously safeguarding these components, the treatment ensures that the vehicle maintains optimal power output while extending the life of the fuel system.
  • ✅ REDUCTION OF HARMFUL EMISSIONS: Designed to contribute to a cleaner environment, this treatment significantly reduces harmful exhaust emissions such as carbon monoxide (CO) and hydrocarbons (HC). By promoting more complete combustion, the formula helps decrease the production of toxic gases, making it an ideal solution for those aiming to meet stringent emissions regulations. Regular use can assist in passing MOT emissions tests by lowering pollution levels and ensuring the engine operates within regulatory standards. A cleaner exhaust system means less impact on the environment and improved air quality.
  • ✅ SAFE FOR CATALYTIC CONVERTERS & ALL PETROL ENGINES: Wynn's Formula Gold Petrol System Treatment is formulated to be completely safe for use in all petrol engines, including those equipped with catalytic converters and modern exhaust after-treatment systems. Unlike harsh additives that can damage sensitive engine components, this treatment is carefully engineered to enhance performance without causing harm. Suitable for both older and newer vehicles, it provides a versatile solution for maintaining engine efficiency. For optimal performance, it is recommended to use this treatment in every third tank of fuel to continuously benefit from its cleaning and protective properties.
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4
Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, Treats 500L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (500ml)
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Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, Treats 500L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (500ml)

Archoil
Why we love it
  • Converts low-quality into premium.
  • Highly concentrated formulation.
  • Resolves engine problems effectively.
Main Highlights
  • EXCEPTIONAL HIGH-PERFORMING PREMIUM PETROL FUEL. AR6900-P MAX converts low-quality supermarket petrol into high-performing premium petrol using a carefully selected blend of detergents, lubricants, stabiliser, and combustion improvers.
  • HIGHLY CONCENTRATED FORMULATION with no fillers. 100% Active Ingredients and manufactured in the UK. 1ml Treats 1L of Petrol. 500ML bottle treats up to 500L of fuel.
  • TRANSFORMS ALL PETROL ENGINES GUARANTEED. This petrol system cleaner, engine cleaner, carb cleaner and fuel treatment is suitable for all petrol engines and delivers ongoing Fuel System cleaning, Fuel Injector cleaner, GPF, EGR, CAT, (catalytic converter cleaner) Turbo cleaner and Exhaust cleaning.
  • 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.
  • MULTIPLE PERFORMANCE AND FUEL ECONOMY BENEFITS. This petrol cleaner additive for cars maintains engine performance and improve fuel economy. This petrol 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.
  • 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.
Show More
9.3
Superb
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9.3
Superb
Archoil

Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, Treats 500L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (500ml)

Why we love it
  • Converts low-quality into premium.
  • Highly concentrated formulation.
  • Resolves engine problems effectively.
Main Highlights
  • EXCEPTIONAL HIGH-PERFORMING PREMIUM PETROL FUEL. AR6900-P MAX converts low-quality supermarket petrol into high-performing premium petrol using a carefully selected blend of detergents, lubricants, stabiliser, and combustion improvers.
  • HIGHLY CONCENTRATED FORMULATION with no fillers. 100% Active Ingredients and manufactured in the UK. 1ml Treats 1L of Petrol. 500ML bottle treats up to 500L of fuel.
  • TRANSFORMS ALL PETROL ENGINES GUARANTEED. This petrol system cleaner, engine cleaner, carb cleaner and fuel treatment is suitable for all petrol engines and delivers ongoing Fuel System cleaning, Fuel Injector cleaner, GPF, EGR, CAT, (catalytic converter cleaner) Turbo cleaner and Exhaust cleaning.
  • 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.
  • MULTIPLE PERFORMANCE AND FUEL ECONOMY BENEFITS. This petrol cleaner additive for cars maintains engine performance and improve fuel economy. This petrol 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.
  • 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.
Show More
5
TECHRON PEA Concentrate Plus Petrol Fuel Injector System Cleaner - 300ml
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TECHRON PEA Concentrate Plus Petrol Fuel Injector System Cleaner - 300ml

TECHRON
Why we love it
  • Enhances fuel economy performance.
  • Offers powerful engine acceleration.
  • Strengthens engine corrosion resistance.
Main Highlights
  • Fuel economy performance
  • Engine power and acceleration
  • Cold start performance
  • Deposit-related knock and ping protection
  • Engine corrosion resistance
Show More
9.2
Superb
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9.2
Superb
TECHRON

TECHRON PEA Concentrate Plus Petrol Fuel Injector System Cleaner - 300ml

Why we love it
  • Enhances fuel economy performance.
  • Offers powerful engine acceleration.
  • Strengthens engine corrosion resistance.
Main Highlights
  • Fuel economy performance
  • Engine power and acceleration
  • Cold start performance
  • Deposit-related knock and ping protection
  • Engine corrosion resistance
Show More
6
2X Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

2X Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

Briggs & Stratton
Why we love it
  • Preserves fuel up to 3 years.
  • Protects against ethanol's corrosive effects.
  • Prevents engine gum and varnish.
Main Highlights
  • Keeps fuel fresh for up to 3 years
  • Fuel Fit not only keeps the carburettor clean for easy starting but now also protects against the corrosive effects of ethanol
  • Detergent ingredients to prevent gum and varnish build-up on engine parts
  • Metal de-activators which stop chemical reactions caused by dissolved metals in fuel
  • Corrosion inhibitor that forms a protective barrier on metal parts against harmful effects of ethanol-water mix
Show More
9.1
Superb
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9.1
Superb
Briggs & Stratton

2X Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

Why we love it
  • Preserves fuel up to 3 years.
  • Protects against ethanol's corrosive effects.
  • Prevents engine gum and varnish.
Main Highlights
  • Keeps fuel fresh for up to 3 years
  • Fuel Fit not only keeps the carburettor clean for easy starting but now also protects against the corrosive effects of ethanol
  • Detergent ingredients to prevent gum and varnish build-up on engine parts
  • Metal de-activators which stop chemical reactions caused by dissolved metals in fuel
  • Corrosion inhibitor that forms a protective barrier on metal parts against harmful effects of ethanol-water mix
Show More
7
Wynn's Total Action Petrol Injector & Fuel System Cleaner Additive Treatment 325ml
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Wynn's Total Action Petrol Injector & Fuel System Cleaner Additive Treatment 325ml

Wynn's
5% Off
Why we love it
  • Boosts engine performance significantly.
  • Reduces emissions and smoke.
  • Prevents EGR Valve clogging.
Main Highlights
  • Triple action cleaning: before, during and after combustion.
  • Reduces CO and HC emissions and exhaust smoke.
  • Improves combustion, engine performance, and fuel economy.
  • Prevents clogging of the EGR Valve.
  • Cleans the catalytic converter and gasoline particulate filter.
Show More
9.1
Superb
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9.1
Superb
Wynn's

Wynn's Total Action Petrol Injector & Fuel System Cleaner Additive Treatment 325ml

5% Off
Why we love it
  • Boosts engine performance significantly.
  • Reduces emissions and smoke.
  • Prevents EGR Valve clogging.
Main Highlights
  • Triple action cleaning: before, during and after combustion.
  • Reduces CO and HC emissions and exhaust smoke.
  • Improves combustion, engine performance, and fuel economy.
  • Prevents clogging of the EGR Valve.
  • Cleans the catalytic converter and gasoline particulate filter.
Show More
8
Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 2 x 250ml Treats 500L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (2 x 250ml)
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Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 2 x 250ml Treats 500L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (2 x 250ml)

Archoil
Why we love it
  • Transforms low-quality diesel instantly.
  • Improves engine performance effectively.
  • Reduces harmful exhaust emissions.
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. 2 x 250ML bottle treats up to 500L 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.
Show More
9.0
Superb
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9.0
Superb
Archoil

Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 2 x 250ml Treats 500L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (2 x 250ml)

Why we love it
  • Transforms low-quality diesel instantly.
  • Improves engine performance effectively.
  • Reduces harmful exhaust emissions.
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. 2 x 250ML bottle treats up to 500L 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.
Show More
9
Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 500ml
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Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 500ml

Cataclean
3% Off
Why we love it
  • Improves engine performance dramatically.
  • Reduces vehicle maintenance costs.
  • Significantly lowers emission levels.
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
Show More
8.9
Excellent
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8.9
Excellent
Cataclean

Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 500ml

3% Off
Why we love it
  • Improves engine performance dramatically.
  • Reduces vehicle maintenance costs.
  • Significantly lowers emission levels.
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
Show More
10
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
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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

STP
Why we love it
  • Boosts overall fuel system cleanliness.
  • Enhances engine performance noticeably.
  • Promotes superior fuel economy.
Main Highlights
  • ADVANCED 5 IN 1 PETROL SYSTEM CLEANER: Powerful concentrated fuel additive cleans injectors, intake valves and the entire fuel system to help restore peak petrol engine performance
  • RESTORES POWER & ENGINE RESPONSE: Helps remove harmful carbon deposits and fuel system build-up that can cause hesitation, rough idling, poor acceleration and reduced throttle response
  • IMPROVES FUEL ECONOMY & MPG: Engineered with advanced cleaning technology to optimise fuel combustion, improve petrol efficiency and support smoother everyday driving
  • HELPS PROTECT ENGINE COMPONENTS: Formulated with STP Wearguard technology to reduce friction, condition the fuel system and help maintain long-term engine health
  • EASY TO USE FUEL ADDITIVE: Simply pour one 400ml bottle into your fuel tank before refuelling; suitable for most petrol cars and ideal for regular preventative engine maintenance
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8.8
Excellent
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8.8
Excellent
STP

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

Why we love it
  • Boosts overall fuel system cleanliness.
  • Enhances engine performance noticeably.
  • Promotes superior fuel economy.
Main Highlights
  • ADVANCED 5 IN 1 PETROL SYSTEM CLEANER: Powerful concentrated fuel additive cleans injectors, intake valves and the entire fuel system to help restore peak petrol engine performance
  • RESTORES POWER & ENGINE RESPONSE: Helps remove harmful carbon deposits and fuel system build-up that can cause hesitation, rough idling, poor acceleration and reduced throttle response
  • IMPROVES FUEL ECONOMY & MPG: Engineered with advanced cleaning technology to optimise fuel combustion, improve petrol efficiency and support smoother everyday driving
  • HELPS PROTECT ENGINE COMPONENTS: Formulated with STP Wearguard technology to reduce friction, condition the fuel system and help maintain long-term engine health
  • EASY TO USE FUEL ADDITIVE: Simply pour one 400ml bottle into your fuel tank before refuelling; suitable for most petrol cars and ideal for regular preventative engine maintenance
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We scanned 214 products

We reviewed these offers relevant to the Fuel Additives For Petrol Engines 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 Cataclean, Liqui Moly, Wynn's, Archoil, TECHRON, Briggs & Stratton, STP, 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 Additives For Petrol Engines in the market, we considered we took a deep dive into 1071 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.

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