Best Petrol Fuel Additive of 2026

Last updated on 25/05/2026
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1
Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, 1L Treats 1,000L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (1Litre)
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Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, 1L Treats 1,000L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (1Litre)

Archoil
Why we love it
  • Exceptional premium fuel conversion.
  • Revitalizes any petrol engine.
  • Improves performance and economy.
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. 1L bottle treats up to 1,000L 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.
  • 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
9.7
Exceptional
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9.7
Exceptional
Archoil

Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, 1L Treats 1,000L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (1Litre)

Why we love it
  • Exceptional premium fuel conversion.
  • Revitalizes any petrol engine.
  • Improves performance and economy.
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. 1L bottle treats up to 1,000L 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.
  • 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
Value for Money
2
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
9.6
Superb
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9.6
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
3
3X Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

3X Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

Briggs & Stratton
Why we love it
  • Preserves fuel for three years.
  • Protects against ethanol corrosion.
  • Prevents engine gum build-up.
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
9.4
Superb
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9.4
Superb
Briggs & Stratton

3X Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

Why we love it
  • Preserves fuel for three years.
  • Protects against ethanol corrosion.
  • Prevents engine gum build-up.
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
4
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
9.2
Superb
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9.2
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.
Show More
5
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
9.0
Superb
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9.0
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
6
Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, Treats 500L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (2 x 250ml)
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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 (2 x 250ml)

Archoil
Why we love it
  • Transforms low-quality petrol easily.
  • Improves engine performance significantly.
  • Reduces harmful emissions 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. 2 x 250ml bottles 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.
  • 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
8.8
Excellent
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8.8
Excellent
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 (2 x 250ml)

Why we love it
  • Transforms low-quality petrol easily.
  • Improves engine performance significantly.
  • Reduces harmful emissions 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. 2 x 250ml bottles 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.
  • 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
7
Millers Oils – Petrol Power Ecomax 500 ml Bottle

Millers Oils – Petrol Power Ecomax 500 ml Bottle

Millers Oils
Why we love it
  • Boosts fuel's octane rating significantly.
  • Promotes engine efficiency and cleanliness.
  • Reduces harmful emissions effectively.
Main Highlights
  • Increases octane rating of fuel by 2 numbers. Improved efficiency and cleanliness of petrol injectors and carburettor jets
  • Efficient detergent package to clean and maintain as new conditions within the engine and fuel system. Reduces combustion chamber deposits and improves inlet manifold and valve cleanliness
  • Reduces emissions of hydrocarbons (HC) and carbon dioxide. Maintains catalyst efficiency and may invigorate catalytic convertors
  • Tests show sharper performance, smoother running engines and improved fuel consumption
Show More
8.7
Excellent
Product image 1
8.7
Excellent
Millers Oils

Millers Oils – Petrol Power Ecomax 500 ml Bottle

Why we love it
  • Boosts fuel's octane rating significantly.
  • Promotes engine efficiency and cleanliness.
  • Reduces harmful emissions effectively.
Main Highlights
  • Increases octane rating of fuel by 2 numbers. Improved efficiency and cleanliness of petrol injectors and carburettor jets
  • Efficient detergent package to clean and maintain as new conditions within the engine and fuel system. Reduces combustion chamber deposits and improves inlet manifold and valve cleanliness
  • Reduces emissions of hydrocarbons (HC) and carbon dioxide. Maintains catalyst efficiency and may invigorate catalytic convertors
  • Tests show sharper performance, smoother running engines and improved fuel consumption
Show More
8
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
8.7
Excellent
Product image 1
8.7
Excellent
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
9
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
3% Off
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
Show More
8.7
Excellent
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8.7
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

3% Off
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
Show More
10
Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

Briggs & Stratton
Why we love it
  • Preserves fuel up to 3 years.
  • Protects against ethanol corrosion.
  • Prevents gum, varnish build-up.
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
8.7
Excellent
Product image 1
8.7
Excellent
Briggs & Stratton

Briggs & Stratton Fuel Fit Additive/Stabiliser. 992381

Why we love it
  • Preserves fuel up to 3 years.
  • Protects against ethanol corrosion.
  • Prevents gum, varnish build-up.
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

We scanned 845 products

We reviewed these offers relevant to the Petrol Fuel Additive 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, Briggs & Stratton, Wynn's, Millers Oils, 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 Petrol Fuel Additive in the market, we considered we took a deep dive into 4226 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: