Best Stp Petrol Additives of 2025

Last updated on 08/12/2025
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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.
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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.
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Value for Money
2
STP Petrol Combo Pack – 200ml Injector Cleaner + 400ml 5 in 1 Fuel System Cleaner – Cleans Injectors, Boosts MPG, Reduces Emissions, Restores Petrol Engine Performance
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STP Petrol Combo Pack – 200ml Injector Cleaner + 400ml 5 in 1 Fuel System Cleaner – Cleans Injectors, Boosts MPG, Reduces Emissions, Restores Petrol Engine Performance

AXpower Inspirational Technology Empowering People
Why we love it
  • Powerful cleaning in one treatment.
  • Restores engine performance effectively.
  • Lowers emissions for cleaner driving.
Main Highlights
  • Petrol Bundle contains Petrol Injector Cleaner 200ml and Ultra 5-in-1 Petrol System Cleaner 400ml
  • Cleans & Unclogs: Powerful Petrol Injector Cleaner clears dirty injectors with just one treatment
  • Restores Performance: 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 Petrol Engines: Suitable for all diesel engines including DI, IDI and common rail, and catalytic converters
  • Quick & Easy: Simply pour the entire bottle of Petrol Injector Cleaner or Petrol System Cleaner into a full tank
  • Reduces Rough Idling: For a smoother engine experience
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9.6
Superb
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9.6
Superb
AXpower Inspirational Technology Empowering People

STP Petrol Combo Pack – 200ml Injector Cleaner + 400ml 5 in 1 Fuel System Cleaner – Cleans Injectors, Boosts MPG, Reduces Emissions, Restores Petrol Engine Performance

Why we love it
  • Powerful cleaning in one treatment.
  • Restores engine performance effectively.
  • Lowers emissions for cleaner driving.
Main Highlights
  • Petrol Bundle contains Petrol Injector Cleaner 200ml and Ultra 5-in-1 Petrol System Cleaner 400ml
  • Cleans & Unclogs: Powerful Petrol Injector Cleaner clears dirty injectors with just one treatment
  • Restores Performance: 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 Petrol Engines: Suitable for all diesel engines including DI, IDI and common rail, and catalytic converters
  • Quick & Easy: Simply pour the entire bottle of Petrol Injector Cleaner or Petrol System Cleaner into a full tank
  • Reduces Rough Idling: For a smoother engine experience
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3
AXpower Inspirational Technology Empowering People STP 5-in-1 Petrol Cleaner 400ml – 2 Pack – Cleans Injectors, Boosts Fuel Economy, Reduces Emissions, Improves Acceleration & Engine Efficiency
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AXpower Inspirational Technology Empowering People STP 5-in-1 Petrol Cleaner 400ml – 2 Pack – Cleans Injectors, Boosts Fuel Economy, Reduces Emissions, Improves Acceleration & Engine Efficiency

AXpower Inspirational Technology Empowering People
Why we love it
  • Reduces petrol consumption effectively.
  • Protects vital engine components.
  • Restores engine power and performance.
Main Highlights
  • 🔧 Complete 5-in-1 Engine Treatment Cleans injectors, restores lost power, improves fuel economy, reduces emissions, and helps prevent engine knocking.
  • ⚙️ Restores Acceleration & Engine Response Eliminates deposits and build-up for smoother driving and better throttle response.
  • 🌍 Eco-Friendly Engine Care Reduces harmful exhaust emissions and helps keep your engine running cleaner.
  • ⛽ Better MPG & Fuel Efficiency Improves combustion for more miles per litre and reduced fuel costs.
  • 🧴 2-Pack Value Includes 2 x 400ml bottles – enough for two full tank treatments or two vehicles.
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9.4
Superb
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9.4
Superb
AXpower Inspirational Technology Empowering People

AXpower Inspirational Technology Empowering People STP 5-in-1 Petrol Cleaner 400ml – 2 Pack – Cleans Injectors, Boosts Fuel Economy, Reduces Emissions, Improves Acceleration & Engine Efficiency

Why we love it
  • Reduces petrol consumption effectively.
  • Protects vital engine components.
  • Restores engine power and performance.
Main Highlights
  • 🔧 Complete 5-in-1 Engine Treatment Cleans injectors, restores lost power, improves fuel economy, reduces emissions, and helps prevent engine knocking.
  • ⚙️ Restores Acceleration & Engine Response Eliminates deposits and build-up for smoother driving and better throttle response.
  • 🌍 Eco-Friendly Engine Care Reduces harmful exhaust emissions and helps keep your engine running cleaner.
  • ⛽ Better MPG & Fuel Efficiency Improves combustion for more miles per litre and reduced fuel costs.
  • 🧴 2-Pack Value Includes 2 x 400ml bottles – enough for two full tank treatments or two vehicles.
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4
3 x STP Engine Flush 450ml - for Petrol and Diesel Engines

3 x STP Engine Flush 450ml - for Petrol and Diesel Engines

Fastcar
Why we love it
  • Boosts engine performance significantly.
  • Ensures cleaner, smoother operation.
  • Ideal for varied engines.
Main Highlights
  • Neutralises harmful engine acids
  • Unsticks internal engine components
  • Removing contaminants left behind by draining
  • Suitable for petrol and diesel engines
  • 3 x 450ml bottles
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9.3
Superb
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9.3
Superb
Fastcar

3 x STP Engine Flush 450ml - for Petrol and Diesel Engines

Why we love it
  • Boosts engine performance significantly.
  • Ensures cleaner, smoother operation.
  • Ideal for varied engines.
Main Highlights
  • Neutralises harmful engine acids
  • Unsticks internal engine components
  • Removing contaminants left behind by draining
  • Suitable for petrol and diesel engines
  • 3 x 450ml bottles
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5
STP Complete Petrol Fuel System Cleaner, Car Accessories, 400 ml & GST60450EN06 Oil Treatment for Petrol Engines 450 ml
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STP Complete Petrol Fuel System Cleaner, Car Accessories, 400 ml & GST60450EN06 Oil Treatment for Petrol Engines 450 ml

STP
10% Off
Why we love it
  • Prevents hesitation and power loss.
  • Removes deposits and corrosion.
  • Extra engine protection provided.
Main Highlights
  • Product 1: Cleans the Entire Fuel System in one tank
  • Product 1: Removes deposits from Injectors, Valves and Combustion Chambers
  • Product 1: Prevents hesitation and power loss
  • Product 1: Reduces Corrosion
  • Product 2: Reduces engine wear
  • Product 2: Reduces engine deposits, keeping vital engine parts cleaner
  • Product 2: Reduces oil consumption
  • Product 2: Provides extra engine protection
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9.2
Superb
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9.2
Superb
STP

STP Complete Petrol Fuel System Cleaner, Car Accessories, 400 ml & GST60450EN06 Oil Treatment for Petrol Engines 450 ml

10% Off
Why we love it
  • Prevents hesitation and power loss.
  • Removes deposits and corrosion.
  • Extra engine protection provided.
Main Highlights
  • Product 1: Cleans the Entire Fuel System in one tank
  • Product 1: Removes deposits from Injectors, Valves and Combustion Chambers
  • Product 1: Prevents hesitation and power loss
  • Product 1: Reduces Corrosion
  • Product 2: Reduces engine wear
  • Product 2: Reduces engine deposits, keeping vital engine parts cleaner
  • Product 2: Reduces oil consumption
  • Product 2: Provides extra engine protection
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6
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
12% OffFree Shipping
Why we love it
  • Boosts overall fuel system cleanliness.
  • Enhances engine performance noticeably.
  • Promotes superior fuel economy.
Main Highlights
  • 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 Petrol consumption and exhaust emissions - promotes better fuel economy
  • For capless fuel tanks, please use manufacturer supplied funnel to pour STP additive in
  • Packaging may vary
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9.1
Superb
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9.1
Superb
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

12% OffFree Shipping
Why we love it
  • Boosts overall fuel system cleanliness.
  • Enhances engine performance noticeably.
  • Promotes superior fuel economy.
Main Highlights
  • 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 Petrol consumption and exhaust emissions - promotes better fuel economy
  • For capless fuel tanks, please use manufacturer supplied funnel to pour STP additive in
  • Packaging may vary
Show More
7
STP GST53200EN Petrol Injector Cleaner 200 ml (Pack of 2)
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STP GST53200EN Petrol Injector Cleaner 200 ml (Pack of 2)

STP
14% Off
Why we love it
  • Fast injector cleaning solution.
  • Enhances engine performance drastically.
  • Reduces harmful emissions effectively.
Main Highlights
  • The information below applies to each unit in the pack
  • What You'll Get - 200 ml Petrol Injector Cleaner, Concentrated Cleaning Power
  • Fast & Efficient- Unclogs injectors in just one tankful
  • Cleans and conditions the entire fuel delivery system while smoothing rough idiling
  • Restores power and acceleration
  • Reduces exhaust emissions
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8.9
Excellent
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8.9
Excellent
STP

STP GST53200EN Petrol Injector Cleaner 200 ml (Pack of 2)

14% Off
Why we love it
  • Fast injector cleaning solution.
  • Enhances engine performance drastically.
  • Reduces harmful emissions effectively.
Main Highlights
  • The information below applies to each unit in the pack
  • What You'll Get - 200 ml Petrol Injector Cleaner, Concentrated Cleaning Power
  • Fast & Efficient- Unclogs injectors in just one tankful
  • Cleans and conditions the entire fuel delivery system while smoothing rough idiling
  • Restores power and acceleration
  • Reduces exhaust emissions
Show More
8
STP 50500EN 500ml Complete Fuel System Cleaner for Petrol Engines
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STP 50500EN 500ml Complete Fuel System Cleaner for Petrol Engines

STP
Why we love it
  • Restores lost engine horsepower.
  • Reduces harmful exhaust emissions.
  • Prevents engine knocking and pinking.
Main Highlights
  • STP Complete Fuel System Cleaner for Petrol engines
  • Restores lost horsepower whilst reducing exhaust emissions
  • Cleans and conditions the entire fuel system
  • Stops knocking and pinking
  • 1 x 500ml bottle
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8.8
Excellent
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8.8
Excellent
STP

STP 50500EN 500ml Complete Fuel System Cleaner for Petrol Engines

Why we love it
  • Restores lost engine horsepower.
  • Reduces harmful exhaust emissions.
  • Prevents engine knocking and pinking.
Main Highlights
  • STP Complete Fuel System Cleaner for Petrol engines
  • Restores lost horsepower whilst reducing exhaust emissions
  • Cleans and conditions the entire fuel system
  • Stops knocking and pinking
  • 1 x 500ml bottle
Show More
9
AXpower Inspirational Technology Empowering People STP Petrol 5 in 1 Fuel System Cleaner – 400ml – Engine Cleaner, Injector Cleaner, Fuel Additive, MPG Booster & Emissions Reducer
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AXpower Inspirational Technology Empowering People STP Petrol 5 in 1 Fuel System Cleaner – 400ml – Engine Cleaner, Injector Cleaner, Fuel Additive, MPG Booster & Emissions Reducer

AXpower Inspirational Technology Empowering People
Why we love it
  • Reduces Petrol Consumption Effectively.
  • Protects Engine Parts From Wear.
  • Restores Engine Power And Performance.
Main Highlights
  • 🔧 5-in-1 Action Formula Cleans injectors, restores performance, improves MPG, reduces emissions, and helps prevent engine knock in one treatment.
  • ⚙️ Restores Engine Power Removes carbon and deposit build-up from fuel injectors for smoother acceleration and more responsive driving.
  • 🌱 Reduces Harmful Emissions Lowers CO2 and NOx output for a cleaner, more environmentally friendly drive.
  • ⛽ Boosts Fuel Economy Improves combustion efficiency, helping you go further on each tank of fuel.
  • 🧴 Quick & Easy to Use Simply pour into your petrol tank during a regular fill-up. No special tools or garage visit required.
Show More
8.7
Excellent
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8.7
Excellent
AXpower Inspirational Technology Empowering People

AXpower Inspirational Technology Empowering People STP Petrol 5 in 1 Fuel System Cleaner – 400ml – Engine Cleaner, Injector Cleaner, Fuel Additive, MPG Booster & Emissions Reducer

Why we love it
  • Reduces Petrol Consumption Effectively.
  • Protects Engine Parts From Wear.
  • Restores Engine Power And Performance.
Main Highlights
  • 🔧 5-in-1 Action Formula Cleans injectors, restores performance, improves MPG, reduces emissions, and helps prevent engine knock in one treatment.
  • ⚙️ Restores Engine Power Removes carbon and deposit build-up from fuel injectors for smoother acceleration and more responsive driving.
  • 🌱 Reduces Harmful Emissions Lowers CO2 and NOx output for a cleaner, more environmentally friendly drive.
  • ⛽ Boosts Fuel Economy Improves combustion efficiency, helping you go further on each tank of fuel.
  • 🧴 Quick & Easy to Use Simply pour into your petrol tank during a regular fill-up. No special tools or garage visit required.
Show More
10
STP GST60300EN12 Oil Treatment for Petrol Engines 300 ml
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STP GST60300EN12 Oil Treatment for Petrol Engines 300 ml

STP
Why we love it
  • Effective engine deposit reduction.
  • Enhanced protection for engine longevity.
  • Minimizes overall oil consumption.
Main Highlights
  • What You'll Get - 300 ml Oil Treatment for Petrol Engines
  • Reduces engine deposits, keeping vital engine parts cleaner
  • Provides extra engine protection
  • Reduces oil consumption
  • Proudly made in the UK
Show More
8.7
Excellent
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8.7
Excellent
STP

STP GST60300EN12 Oil Treatment for Petrol Engines 300 ml

Why we love it
  • Effective engine deposit reduction.
  • Enhanced protection for engine longevity.
  • Minimizes overall oil consumption.
Main Highlights
  • What You'll Get - 300 ml Oil Treatment for Petrol Engines
  • Reduces engine deposits, keeping vital engine parts cleaner
  • Provides extra engine protection
  • Reduces oil consumption
  • Proudly made in the UK
Show More

We scanned 845 products

We reviewed these offers relevant to the Stp Petrol 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 Archoil, AXpower Inspirational Technology Empowering People, Fastcar, 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 Stp Petrol Additives 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: