Best Engine Cleaner: image
Top Pick

Engine oil. It is a highly effective cleaner that removes deposits and isolates liquid contaminants from the engine. The product has been approved by the National Institute of Standards (NIST) for use in diesel engines. Not only does it reduce fuel consumption, but also prevents corrosion of unprotected metal surfaces. It can be used with any other petrol or diesel engine oils. It contains no harmful chemicals and is non-toxic to human health.

Best Price

GUNK, a local family owned company, has been manufacturing foam cleaners since its inception in 1975. The foam cleaners are designed to remove dirt, dust and road grime from all types of vehicles. It is made using the highest quality ingredients and uses no harmful chemicals or harsh chemicals. The foam cleaners are environmentally friendly and non-toxic. They can be used on any vehicle for up to 30 days. Not only that, but they also reduce carbon monoxide emissions.

Honorable Mention

Cataclean, a fuel and exhaust system cleaner, can reduce the total hydrocarbon emissions by up to 50 percent. The product is available in four different formulations including petrol, diesel, and flex-fuel. It has been tested at various levels of performance and it shows no adverse effects on the environment. Notably, catalytic converters are used in over 95% of motor vehicles worldwide. However, some countries have banned its use due to safety concerns.

Best Engine Cleaner

Top 10 Best Engine Cleaner

1
Why we chose it
  • GUNK is a local family owned company based out of Charlotte, NC. For more than 75 years, GUNK products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation.
  • Safely removes grease, dirt and grime from most engines
  • Designed for older, dirty engines
  • Fast-acting, highly effective foaming formula
  • Rinses easily with water
Gunk FEB1-12PK 'Engine Brite' Engine Cleaner Foam - 17 oz, (Case of 12): image
90%
customers recommend this product
4.5/ 5
2
Why we chose it
  • Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
  • Premium aftermarket replacement part
  • Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
ACDelco GM Original Equipment 10-3015 Engine Cylinder/Combustion Chamber Cleaner - 32 oz: image
90%
customers recommend this product
4.5/ 5
Value for money4.8
Mileage4.8
Easy to use4.3
3
Why we chose it
    SS14 Sea Foam Spray Quick Acting Top Engine Cleaner And Lube 12oz (Pack Of 2): image
    94%
    customers recommend this product
    4.7/ 5
    Value for money4.6
    Mileage4.4
    4
    Why we chose it
    • Not for use in 2-stroke or oil / gas mix engines
    • Safe for gasoline, diesel, hybrid and flex-fuel vehicles does not alter fuel
    • Improves overall vehicle performance-including driveability issues such as power reduction, hesitation, rough idle, hard starts and lost fuel economy
    • Using Cataclean can lower your total hydrocarbon emissions by up to 50 percent
    • Reduces carbon build-up in catalytic converter, oxygen sensors, fuel injectors and cylinder heads which results in improved fuel efficiency
    Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter: image
    82%
    customers recommend this product
    4.1/ 5
    Easy to use4.2
    Value for money3.4
    Mileage3.3
    Accuracy3
    Top Pick
    5

    Liqui Moly 2037 Pro-Line Engine Flush

    4,469 ratings | 34 offers | 4,469 Reviews
    Price: $13.95$31.28
    Why we chose it
    • Neutral to seals and other materials installed in the engine
    • Gentle and rapid cleaning
    • Simple to use
    • Easy way to clean and flush the oil systems of gasoline and diesel engines
    • Compatible with catalytic converters
    Liqui Moly 2037 Pro-Line Engine Flush: image
    94%
    customers recommend this product
    4.7/ 5
    Easy to use4.7
    Value for money4.5
    Mileage4.5
    Sheerness4.4
    6
    Why we chose it
    • All-natural citrus based formula is designed to remove dirt, grime, stains, and filth faster than ever imagined
    • Concentrated and dilutable
    • Works on everything from carpets to engine bays
    • Cleans away dirt, grime, and stains from any surface
    • Advanced cleaning formula works on virtually any surface both interior and exterior
    Chemical Guys CLD_101_16 All Clean+ Citrus Based All Purpose Super Cleaner (16 oz): image
    94%
    customers recommend this product
    4.7/ 5
    Easy to use4.7
    Longevity4.7
    Value for money4.4
    Scent4.2
    For deep cleaning3.9
    7
    Why we chose it
    • REDUCE FUEL CONSUMPTION & BAD SMELL: while cutting down on fuel consumption, it also gets rid of the icky smell developed by your car overtime.
    • PROTECT ENGINE: Proper fuel and exhaust flow will keep that engine running cleaner, smoother, and better, which will also cut down on maintenance costs.
    • BETTER ENGINE PERFORMANCE: help clean the fuel injection system, as well as the cylinders, improving overall performance.
    • SAFE for gasoline, diesel, hybrid, and flex-fuel vehicles does not alter fuel. Not for use in 2-stroke or oil/gas mix engines.
    • CLEAN THE ENTIRE SYSTEM: it can also clean other parts like the oxygen sensor, the fuel injectors, cylinder heads, and others.
    Catalytic Converter Cleaner for Car Engine Cleaner Powerful Booster Cleaner Oxygen Sensor The Fuel Injectors Cylinder Heads Cleaning Agent (3Pcs): image
    74%
    customers recommend this product
    3.7/ 5
    Easy to use4.2
    Value for money2.9
    Mileage2.8
    8

    Griot’s Garage 10959 Engine Cleaner 22oz

    265 ratings | 2 offers | 265 Reviews
    Price: $11.99$21.04
    Why we chose it
    • Mild degreaser perfect for cleaning engines
    • Leaves surfaces clean and ready to be dressed or waxed
    • Spray-On, agitate, and rinse-off
    Griot's Garage 10959 Engine Cleaner 22oz: image
    90%
    customers recommend this product
    4.5/ 5
    Easy to use4.7
    Value for money4.5
    9
    Why we chose it
    • ELIMINATES WATER This fuel injector cleaner helps to remove water that may get into your fuel system. Penetrating deep into the fuel line, this simple fuel additive prevents the need to disassemble the engine. The 8 oz. bottle of this alcohol-free fuel additive treats up to 20 gallons of fuel.
    • VERSATILE Compatible with all small engines, adding STA-BIL Fast Fix to your 2-cycle or 4-cycle small engine cleans carburetors and injectors while acting as a water remover. Use this product in your lawn mower, chainsaw, trimmer, snow blower, generator, and more.
    • SHELF LIFE All STA-BIL branded products are good for use up to 2 years after the bottle was opened. Be sure to mark the date you opened the bottle on the back of your package! Proudly made in the USA by a family-owned company in Chicago, Illinois.
    • DIRECTIONS For rough running engines use 1 oz. of STA-BIL Fast Fix per 2.5 gallons of fuel. Fill with fresh gas. Start the engine and allow to run for 15 minutes to allow the additive to work its way through the fuel system. If the engine does not start, attempt to turn it over a few times so the additive makes its way through the fuel system and allow to sit overnight. Attempt to start again, if problems persist you may need to have it looked at by a mechanic.
    • FIXES ROUGH RUNNING ENGINES STA-BIL Fast Fix eats away at gum and varnish that cause rough starts and no starts in your small engine equipment. This easy-to-use fuel additive combats the effects of ethanol blended gasoline.
    STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304): image
    90%
    customers recommend this product
    4.5/ 5
    Sheerness4.8
    Easy to use4.7
    Value for money4.5
    Mileage4.2
    10
    Why we chose it
    • Constantly Modernizing Our Powerful Devices To Meet The Demands Of The Modern User
    • All Products Have Been Designed With The Professional In Mind
    • International Renown For Our Diverse Range Of Award-Winning Products
    • Leading Manufacturer Of High-Quality Products
    • Fully Equipped With State-Of-The-Art Technology
    ACDelco GM Original Equipment 10-3007 Top Engine Cleaner - 13 oz Aerosol: image
    90%
    customers recommend this product
    4.5/ 5
    Top Pick
    Liqui Moly 2037 Pro-Line Engine Flush
    Liqui Moly's Pro Line Engine Flush is a highly effective detergent additives in Engine Flush clean interior engine before oil change. Removes Deposits, residues from all 4-stroke gasoline engines and diesel engines. Dissolves sludge and lacquer and isolates solid particles and liquid contaminants. Improves the combustion process and restores full engine performance. Prevents corrosion of unprotected metal surfaces. Recovers oil lubricating properties. Add to engine oil before engine oil change. Let engine run on idle speed for 10 minutes. Drain oil, change oil filter and refill with fresh Liqui Moly engine oil. Fully compatible with all commercially available engine oils.
    Ranking the Brands
    Gunk: 10.00%
    ACDelco: 20.00%
    : 20.00%
    Cataclean: 10.00%
    Liqui Moly: 10.00%
    Chemical Guys: 10.00%
    Griot’s Garage: 10.00%
    STA-BIL: 10.00%

    Comparison Table

    Сomparison: Gunk FEB1-12PK 'Engine Brite' Engine Cleaner Foam - 17 oz, (Case of 12): imageСomparison: ACDelco GM Original Equipment 10-3015 Engine Cylinder/Combustion Chamber Cleaner - 32 oz: imageСomparison: SS14 Sea Foam Spray Quick Acting Top Engine Cleaner And Lube 12oz (Pack Of 2): imageСomparison: Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter: imageСomparison: Liqui Moly 2037 Pro-Line Engine Flush: imageСomparison: Chemical Guys CLD_101_16 All Clean+ Citrus Based All Purpose Super Cleaner (16 oz): imageСomparison: Catalytic Converter Cleaner for Car Engine Cleaner Powerful Booster Cleaner Oxygen Sensor The Fuel Injectors Cylinder Heads Cleaning Agent (3Pcs): imageСomparison: Griot's Garage 10959 Engine Cleaner 22oz: imageСomparison: STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304): imageСomparison: ACDelco GM Original Equipment 10-3007 Top Engine Cleaner - 13 oz Aerosol: image
    Gunk FEB1-12PK ‘Engine Brite’ Engine Cleaner Foam – 17 oz, (Case of 12)ACDelco GM Original Equipment 10-3015 Engine Cylinder/Combustion Chamber Cleaner – 32 ozSS14 Sea Foam Spray Quick Acting Top Engine Cleaner And Lube 12oz (Pack Of 2)Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 MilliliterLiqui Moly 2037 Pro-Line Engine FlushChemical Guys CLD_101_16 All Clean+ Citrus Based All Purpose Super Cleaner (16 oz)Catalytic Converter Cleaner for Car Engine Cleaner Powerful Booster Cleaner Oxygen Sensor The Fuel Injectors Cylinder Heads Cleaning Agent (3Pcs)Griot’s Garage 10959 Engine Cleaner 22ozSTA-BIL Fast Fix – Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304)ACDelco GM Original Equipment 10-3007 Top Engine Cleaner – 13 oz Aerosol
    ManufacturerGunkACDelcoCATACLEAN EXST SYS/Liqui MolyChemical GuysGriot’s GarageGold Eagle Co.ACDelco
    BrandGunkACDelcoCatacleanLiqui MolyChemical GuysGriot’s GarageSTA-BILACDelco
    Item Weight16 pounds2.08 pounds12 ounces15.8 ounces1.05 pounds1.26 pounds1.54 pounds7.4 ounces1.05 pounds
    Product Dimensions11 x 8.3 x 10 inches3.25 x 3.25 x 8.75 inches2.68 x 2.68 x 9.06 inches2.76 x 2.76 x 7.99 inches2.8 x 2.8 x 9.29 inches10 x 2.8 x 2.1 inches22.7 x 17.6 x 4.3 inches
    Is Discontinued By ManufacturerNoNoNoNoNoNoYes
    Size500 Liter16 Ounce, (Single Unit)22 Ounce8 fl oz

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