Best Carb Cleaner Liquid of 2026

Last updated on 07/05/2026
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1
Ultrasonic Carburettor | Carb | Engine Cleaner 5 litre Fluid Solution 5L
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Ultrasonic Carburettor | Carb | Engine Cleaner 5 litre Fluid Solution 5L

Best Ultrasonic Cleaners
Why we love it
  • Removes petrol residue effortlessly.
  • Cleans various engine components effectively.
  • Concentrate maximizes cleaning solution yield.
Main Highlights
  • Removes dried petrol residue (AKA petrol varnish). Unblock jets quickly. If your carb has been standing for some time and the petrol has hardened like "varnish", our fluid disolves this easliy.
  • Cleans carburettors, valves, fuel injectors, jets + most engine parts. Our cleaning fluid will clean most parts from out of an engine. Casings, rocker covers, even brake calipers. The cleaning fluid won't damage, corrode or darken metal components.
  • Concentrated - 5 Ltr makes 50 Ltr of working solution. The fluid can be used with tap water. Dilute at a ratio of 10:1. Re-use until you can't see the bottom of the tank or the fluid starts to loose it's efficiency.
  • It delivers fantastic results on alloy castings, not only removing physical dirt, but also it visually (cosmetically) brightens dulling that can happen over the years.
  • Deep cleans, removing dirt and oxidation. Obviously our cleaning fluid can't make a component look better than when it left the manufacturer's factory "way-back-when". However, the end results are normally very impressive.
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9.7
Exceptional
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9.7
Exceptional
Best Ultrasonic Cleaners

Ultrasonic Carburettor | Carb | Engine Cleaner 5 litre Fluid Solution 5L

Why we love it
  • Removes petrol residue effortlessly.
  • Cleans various engine components effectively.
  • Concentrate maximizes cleaning solution yield.
Main Highlights
  • Removes dried petrol residue (AKA petrol varnish). Unblock jets quickly. If your carb has been standing for some time and the petrol has hardened like "varnish", our fluid disolves this easliy.
  • Cleans carburettors, valves, fuel injectors, jets + most engine parts. Our cleaning fluid will clean most parts from out of an engine. Casings, rocker covers, even brake calipers. The cleaning fluid won't damage, corrode or darken metal components.
  • Concentrated - 5 Ltr makes 50 Ltr of working solution. The fluid can be used with tap water. Dilute at a ratio of 10:1. Re-use until you can't see the bottom of the tank or the fluid starts to loose it's efficiency.
  • It delivers fantastic results on alloy castings, not only removing physical dirt, but also it visually (cosmetically) brightens dulling that can happen over the years.
  • Deep cleans, removing dirt and oxidation. Obviously our cleaning fluid can't make a component look better than when it left the manufacturer's factory "way-back-when". However, the end results are normally very impressive.
Show More
Value for Money
2
Allendale UltroCarb Ultrasonic Carburettor & Engine Parts Cleaner - Makes 30L - UK Made Professional Cleaning Powder for Workshop Use - Aluminium Safe, Includes Scoop, 600g
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Allendale UltroCarb Ultrasonic Carburettor & Engine Parts Cleaner - Makes 30L - UK Made Professional Cleaning Powder for Workshop Use - Aluminium Safe, Includes Scoop, 600g

ULTROPOWDER
Why we love it
  • Easily removes stubborn grime.
  • Ideal for routine maintenance.
  • Perfect for parts re-manufacturing.
Main Highlights
  • Powerful ultrasonic cleaning formulation engineered and manufactured in the UK - trademarked UltroPowder solution removes carbon, oil and fuel residue from carburettors, engine parts and metal components using enhanced ultrasonic cavitation for thorough, damage-free cleaning.
  • Outstanding economy and capacity - the 600 g powder concentrate produces 30 litres of ultrasonic cleaning solution, specialised formula has a water softener included so no need for de-ionised water. Ideal for busy workshops, engine rebuilders and maintenance teams needing reliable, high-volume cleaning from a compact, lightweight product.
  • Aluminium-safe and non-acidic formulation protects sensitive alloys and finishes - safely cleans brass, copper, zinc, steel and rubber seals without surface damage. The non-solvent-based powder dissolves completely to form a stable, workshop-ready cleaning solution.
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9.5
Superb
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9.5
Superb
ULTROPOWDER

Allendale UltroCarb Ultrasonic Carburettor & Engine Parts Cleaner - Makes 30L - UK Made Professional Cleaning Powder for Workshop Use - Aluminium Safe, Includes Scoop, 600g

Why we love it
  • Easily removes stubborn grime.
  • Ideal for routine maintenance.
  • Perfect for parts re-manufacturing.
Main Highlights
  • Powerful ultrasonic cleaning formulation engineered and manufactured in the UK - trademarked UltroPowder solution removes carbon, oil and fuel residue from carburettors, engine parts and metal components using enhanced ultrasonic cavitation for thorough, damage-free cleaning.
  • Outstanding economy and capacity - the 600 g powder concentrate produces 30 litres of ultrasonic cleaning solution, specialised formula has a water softener included so no need for de-ionised water. Ideal for busy workshops, engine rebuilders and maintenance teams needing reliable, high-volume cleaning from a compact, lightweight product.
  • Aluminium-safe and non-acidic formulation protects sensitive alloys and finishes - safely cleans brass, copper, zinc, steel and rubber seals without surface damage. The non-solvent-based powder dissolves completely to form a stable, workshop-ready cleaning solution.
Show More
3
Carbusonic Ultrasonic carburettor cleaning solution 1lt removes dirt and grease from engine parts, tools and motorbike parts 1 litre
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Carbusonic Ultrasonic carburettor cleaning solution 1lt removes dirt and grease from engine parts, tools and motorbike parts 1 litre

Carbusonic
Why we love it
  • Safe for multiple materials.
  • Powerful and reusable cleaner.
  • Restores vehicle performance.
Main Highlights
  • Aluminium safe, will not darken parts. Use on Steel, Brass, Tin, Zinc, Aluminium, Copper, Ceramic, Plastic, Rubber and glass. Unlike acid-based cleaners our solution will not attack aluminium to darken the surface instead it is compatible and leave a good clean finish.
  • Powerful performance great for restoration & maintenance dilute Up to 1- 10 with hot water. Use multiple times for great value.
  • Restores Performance - Removes gelled fuel, tarnish, oxide and debris from bowels and jets. Gelled fuel from standing or over-wintering vehicles has a dramatic effect on fuel system and power output, cleaning your carburettor with ultrasonic fluid restores power and fuel efficiency by unblocking jets and float chambers allowing proper injection and fuel to air ratio.
  • Ideally suited to carburettor cleaning - safely restores manifolds, carburettors and most machine parts. Alcohol based surfactants and buffering agents combine to impact debris with over 4000c implosions produced by ultrasonic sound waves to break down surface contamination. The grime is held in solution leaving the item clean and decontaminated.
  • Used by professionals developed in the UK great feedback Carbusonic limited have 35 years' experience in chemical coatings and rust treatment products formulated to exacting standards, every batch is tested to meet strict guidelines and through years of experience and feedback we know what the customer expects
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9.3
Superb
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9.3
Superb
Carbusonic

Carbusonic Ultrasonic carburettor cleaning solution 1lt removes dirt and grease from engine parts, tools and motorbike parts 1 litre

Why we love it
  • Safe for multiple materials.
  • Powerful and reusable cleaner.
  • Restores vehicle performance.
Main Highlights
  • Aluminium safe, will not darken parts. Use on Steel, Brass, Tin, Zinc, Aluminium, Copper, Ceramic, Plastic, Rubber and glass. Unlike acid-based cleaners our solution will not attack aluminium to darken the surface instead it is compatible and leave a good clean finish.
  • Powerful performance great for restoration & maintenance dilute Up to 1- 10 with hot water. Use multiple times for great value.
  • Restores Performance - Removes gelled fuel, tarnish, oxide and debris from bowels and jets. Gelled fuel from standing or over-wintering vehicles has a dramatic effect on fuel system and power output, cleaning your carburettor with ultrasonic fluid restores power and fuel efficiency by unblocking jets and float chambers allowing proper injection and fuel to air ratio.
  • Ideally suited to carburettor cleaning - safely restores manifolds, carburettors and most machine parts. Alcohol based surfactants and buffering agents combine to impact debris with over 4000c implosions produced by ultrasonic sound waves to break down surface contamination. The grime is held in solution leaving the item clean and decontaminated.
  • Used by professionals developed in the UK great feedback Carbusonic limited have 35 years' experience in chemical coatings and rust treatment products formulated to exacting standards, every batch is tested to meet strict guidelines and through years of experience and feedback we know what the customer expects
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4
STP 12 x CARB SPRAY CLEANER 500ML AEROSOL - FOR CARBURETTOR CHOKES

STP 12 x CARB SPRAY CLEANER 500ML AEROSOL - FOR CARBURETTOR CHOKES

STP
Why we love it
  • Enhances carburettor choke performance.
  • Convenient aerosol spray format.
  • Generous 500ml product size.
Main Highlights
  • Stp 12 X Carb Spray Cleaner 500Ml Aerosol For Carburettor Chokes
  • STP 12 x CARB SPRAY CLEANER 500ML AEROSOL FOR CARBURETTOR CHOKES
  • Product type: AUTO ACCESSORY
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9.2
Superb
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9.2
Superb
STP

STP 12 x CARB SPRAY CLEANER 500ML AEROSOL - FOR CARBURETTOR CHOKES

Why we love it
  • Enhances carburettor choke performance.
  • Convenient aerosol spray format.
  • Generous 500ml product size.
Main Highlights
  • Stp 12 X Carb Spray Cleaner 500Ml Aerosol For Carburettor Chokes
  • STP 12 x CARB SPRAY CLEANER 500ML AEROSOL FOR CARBURETTOR CHOKES
  • Product type: AUTO ACCESSORY
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5
Allendale UltroCarb Ultrasonic Metal & Engine Parts Cleaner - Makes 20L - UK Made Concentrated Cleaning Powder for Carburettors, Tools & Engine Components - Aluminium Safe, 400g
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Allendale UltroCarb Ultrasonic Metal & Engine Parts Cleaner - Makes 20L - UK Made Concentrated Cleaning Powder for Carburettors, Tools & Engine Components - Aluminium Safe, 400g

ULTROPOWDER
12% Off
Why we love it
  • Cost-effective and safe solution. Effective cleaning for metals. Convenient and eco-friendly packaging.
Main Highlights
  • Powerful ultrasonic cleaning formulation engineered and manufactured in the UK - trademarked UltroPowder solution removes carbon, oil and fuel residue from carburettors, engine parts and metal components using enhanced ultrasonic cavitation for thorough, damage-free cleaning.
  • Exceptional coverage and value - the 400 g powder concentrate mixes with standard tap water to produce 20 litres of ready-to-use ultrasonic cleaning solution, specialised formula has a water softener included so no need for de-ionised water. Ideal for routine maintenance, restoration projects and small workshops requiring consistent professional results without storing heavy liquid containers.
  • Aluminium-safe and non-acidic formulation protects sensitive alloys and finishes - cleans brass, copper, zinc, steel and rubber seals without corrosion, pitting or dulling. The fully soluble powder is non-solvent-based and safe on metals, plastics and elastomers.
  • Best results with an ultrasonic bath - mix using standard tap water and the included measuring scoop for accurate dilution and repeatable performance. Heat the bath to 50–60 °C and clean parts for 10–30 minutes. Reusable solution delivers efficient, low-waste workshop cleaning.
  • UK quality you can trust - developed and tested in England by Allendale Ultrasonics and Made in Britain certified. The lightweight powder format saves storage space and reduces plastic packaging by up to 80% compared with liquid ultrasonic cleaners.
  • Allendale UltroPowder Ultrasonic Cleaning Powder 400 g is a UK-made concentrate for ultrasonic baths designed for regular garage and workshop cleaning of carburettors, engine components and metal parts. The aluminium-safe, non-acidic formula lifts oil, grease and carbon build-up without pitting or darkening. Mix with standard tap water using the included measuring scoop to produce 20 litres of ultrasonic cleaning solution, providing repeatable results with easier storage and up to 80% less plastic packaging than liquid cleaners.
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9.1
Superb
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9.1
Superb
ULTROPOWDER

Allendale UltroCarb Ultrasonic Metal & Engine Parts Cleaner - Makes 20L - UK Made Concentrated Cleaning Powder for Carburettors, Tools & Engine Components - Aluminium Safe, 400g

12% Off
Why we love it
  • Cost-effective and safe solution. Effective cleaning for metals. Convenient and eco-friendly packaging.
Main Highlights
  • Powerful ultrasonic cleaning formulation engineered and manufactured in the UK - trademarked UltroPowder solution removes carbon, oil and fuel residue from carburettors, engine parts and metal components using enhanced ultrasonic cavitation for thorough, damage-free cleaning.
  • Exceptional coverage and value - the 400 g powder concentrate mixes with standard tap water to produce 20 litres of ready-to-use ultrasonic cleaning solution, specialised formula has a water softener included so no need for de-ionised water. Ideal for routine maintenance, restoration projects and small workshops requiring consistent professional results without storing heavy liquid containers.
  • Aluminium-safe and non-acidic formulation protects sensitive alloys and finishes - cleans brass, copper, zinc, steel and rubber seals without corrosion, pitting or dulling. The fully soluble powder is non-solvent-based and safe on metals, plastics and elastomers.
  • Best results with an ultrasonic bath - mix using standard tap water and the included measuring scoop for accurate dilution and repeatable performance. Heat the bath to 50–60 °C and clean parts for 10–30 minutes. Reusable solution delivers efficient, low-waste workshop cleaning.
  • UK quality you can trust - developed and tested in England by Allendale Ultrasonics and Made in Britain certified. The lightweight powder format saves storage space and reduces plastic packaging by up to 80% compared with liquid ultrasonic cleaners.
  • Allendale UltroPowder Ultrasonic Cleaning Powder 400 g is a UK-made concentrate for ultrasonic baths designed for regular garage and workshop cleaning of carburettors, engine components and metal parts. The aluminium-safe, non-acidic formula lifts oil, grease and carbon build-up without pitting or darkening. Mix with standard tap water using the included measuring scoop to produce 20 litres of ultrasonic cleaning solution, providing repeatable results with easier storage and up to 80% less plastic packaging than liquid cleaners.
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6
STP Carb Spray Cleaner 500ml 4pk

STP Carb Spray Cleaner 500ml 4pk

STP
Why we love it
  • Effective at removing grime.
  • Convenient 500ml spray size.
  • Trusted STP brand quality.
Main Highlights
  • STP Carb Spray Cleaner 500ml 4pk
  • AUTO PART
  • STP
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9.0
Superb
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9.0
Superb
STP

STP Carb Spray Cleaner 500ml 4pk

Why we love it
  • Effective at removing grime.
  • Convenient 500ml spray size.
  • Trusted STP brand quality.
Main Highlights
  • STP Carb Spray Cleaner 500ml 4pk
  • AUTO PART
  • STP
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7
STP Carb Spray Cleaner 500ml 6pk

STP Carb Spray Cleaner 500ml 6pk

STP
Why we love it
  • Reliable cleaning for carburetors.
  • Value pack of six.
  • Trusted brand STP.
Main Highlights
  • STP Carb Spray Cleaner 500 ml 6 pieces
  • product type: CLEANING AGENT
  • brand: STP
  • size: 500 ml
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8.8
Excellent
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8.8
Excellent
STP

STP Carb Spray Cleaner 500ml 6pk

Why we love it
  • Reliable cleaning for carburetors.
  • Value pack of six.
  • Trusted brand STP.
Main Highlights
  • STP Carb Spray Cleaner 500 ml 6 pieces
  • product type: CLEANING AGENT
  • brand: STP
  • size: 500 ml
Show More
8
LIQUI MOLY Carburetor and Valve Cleaner | 300 ml | Petroladititive | SKU: 1818
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LIQUI MOLY Carburetor and Valve Cleaner | 300 ml | Petroladititive | SKU: 1818

Liqui Moly
Why we love it
  • Boosts overall engine performance.
  • Helps save on fuel.
  • Beneficial for various engines.
Main Highlights
  • Increases engine performance. Removes deposits in carburetor, in valves, spark plugs and in the combustion chamber and prevents renewed formation. Saves fuel. Improves compression.
  • Used as an additive for the fuel of all 2-stroke and 4-stroke petrol engines, especially for motor vehicle engines. Also used for small engines for ships and industry.
  • One 300 ml can is sufficient for 70 litres of fuel. Mix the contents of the can with the fuel. Mixing takes place automatically.
  • When decommissioning and preserving engines, add Carburettor Cleaner to the petrol at the rate of 1 %. Follow the instructions for decommissioning and preserving engines.
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8.7
Excellent
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8.7
Excellent
Liqui Moly

LIQUI MOLY Carburetor and Valve Cleaner | 300 ml | Petroladititive | SKU: 1818

Why we love it
  • Boosts overall engine performance.
  • Helps save on fuel.
  • Beneficial for various engines.
Main Highlights
  • Increases engine performance. Removes deposits in carburetor, in valves, spark plugs and in the combustion chamber and prevents renewed formation. Saves fuel. Improves compression.
  • Used as an additive for the fuel of all 2-stroke and 4-stroke petrol engines, especially for motor vehicle engines. Also used for small engines for ships and industry.
  • One 300 ml can is sufficient for 70 litres of fuel. Mix the contents of the can with the fuel. Mixing takes place automatically.
  • When decommissioning and preserving engines, add Carburettor Cleaner to the petrol at the rate of 1 %. Follow the instructions for decommissioning and preserving engines.
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9
OB41 High Performance Carburettor Cleaner - Maximises Carburettor Performance - Helps Improve Fuel Efficiency - Blend Powerful Cleaning Solvents - 400ml
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OB41 High Performance Carburettor Cleaner - Maximises Carburettor Performance - Helps Improve Fuel Efficiency - Blend Powerful Cleaning Solvents - 400ml

OB41
Why we love it
  • Boosts carburettor performance significantly.
  • Enhances fuel efficiency.
  • Safe and versatile for use.
Main Highlights
  • CLEANING CARBURETTOR - Quickly and safely removes the build up on carburettors, heat valves, automatic chokes, throttle plates, PCV valves, heat rises and throttle linkages to maximise carburettor performance
  • FUEL EFFICIENCY - Effective cleaning and removal of contaminants maximizes carburettor performance while improving fuel system efficiency thereby ensuring and maximizing fuel economy
  • MULTI USE - OB41 Carburettor Cleaner can also help clean and free sticky valves, heat risers and throttle linkages
  • SAFE TO USE - Lead and silicone free, Does not harm catalytic converters, oxygen sensors or fuel injectors.
  • CONTENTS - 1 x OB41 High Performance Carburettor Cleaner 400ml
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8.7
Excellent
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8.7
Excellent
OB41

OB41 High Performance Carburettor Cleaner - Maximises Carburettor Performance - Helps Improve Fuel Efficiency - Blend Powerful Cleaning Solvents - 400ml

Why we love it
  • Boosts carburettor performance significantly.
  • Enhances fuel efficiency.
  • Safe and versatile for use.
Main Highlights
  • CLEANING CARBURETTOR - Quickly and safely removes the build up on carburettors, heat valves, automatic chokes, throttle plates, PCV valves, heat rises and throttle linkages to maximise carburettor performance
  • FUEL EFFICIENCY - Effective cleaning and removal of contaminants maximizes carburettor performance while improving fuel system efficiency thereby ensuring and maximizing fuel economy
  • MULTI USE - OB41 Carburettor Cleaner can also help clean and free sticky valves, heat risers and throttle linkages
  • SAFE TO USE - Lead and silicone free, Does not harm catalytic converters, oxygen sensors or fuel injectors.
  • CONTENTS - 1 x OB41 High Performance Carburettor Cleaner 400ml
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10
Fastcar 3 x STP Carb Cleaner Spray 500ml

Fastcar 3 x STP Carb Cleaner Spray 500ml

Fastcar
Why we love it
  • Enhances engine power and performance.
  • Prevents harmful deposit accumulation.
  • Ideal for various engine parts.
Main Highlights
  • Powerful formula maximises power, performance and efficiency of your engine
  • Prevents the build up of harmful deposits
  • For use on carburettors, linkages and automatic chokes
  • 500ml spray can
Show More
8.7
Excellent
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8.7
Excellent
Fastcar

Fastcar 3 x STP Carb Cleaner Spray 500ml

Why we love it
  • Enhances engine power and performance.
  • Prevents harmful deposit accumulation.
  • Ideal for various engine parts.
Main Highlights
  • Powerful formula maximises power, performance and efficiency of your engine
  • Prevents the build up of harmful deposits
  • For use on carburettors, linkages and automatic chokes
  • 500ml spray can
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We scanned 760 products

We reviewed these offers relevant to the Carb Cleaner Liquid 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 Best Ultrasonic Cleaners, ULTROPOWDER, Carbusonic, STP, Liqui Moly, OB41, Fastcar, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.
For the best Carb Cleaner Liquid in the market, we considered we took a deep dive into 3801 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: