Top 10 Best engine cleaner in 2026

Last Updated - 6/7/2026

🏆Best Choice

Simple Green

Simple Green 13005CT Industrial Cleaner and Degreaser, Concentrated, 127.8 Fl Oz, Pack of 1, White

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Industrial strength cleaner, degreaser, and deodorizer removes heavy dirt, grease, food residue and stains from washable surfaces.
•Recognized by the U.S. EPA's Safer Choice Program.
•Cleans counters, carpet, floors, machines, equipment and vehicles.
•Cost-effective concentrated formula can be custom diluted for specific tasks giving you more value per bottle.
•Can be used manually or with professional cleaning equipment such as floor scrubbers, dip tanks, carpet extractors, pressure washers, steam extractors and foamers.

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$10.98

$14.49

-24%

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Liqui Moly

Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Easy way to clean and flush the oil systems of gasoline and diesel engines
•Gentle and rapid cleaning
•Neutral to seals and other materials installed in the engine
•Compatible with catalytic converters
•Simple to use

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$19.99

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Chemical Guys

Chemical Guys Signature Series Orange Degreaser - Heavy Duty All Purpose Cleaner for Engines, Tires, Undercarriages, Tools and More - Professional Strength, Breaks Down Grease, Oil and Grime, 16 oz

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Powerful Degreaser (CLD_201_16SW) - Signature Series Orange Degreaser quickly breaks down grease, oil, grime, and dirt on engines, tires, undercarriages, tools, and more for a deep professional clean.
•Heavy Duty Cleaning - Professional-strength formula dissolves tough grease and road grime on contact; restores surfaces with ease for use on cars, trucks, SUVs, motorcycles, RVs, and more.
•Versatile Multi-Surface Use - Safe on engine bays, wheels, tires, undercarriages, garage tools, and shop equipment; delivers effective cleaning power wherever tough grease and oil buildup occurs.
•Easy Spray Application - Concentrated formula can be diluted for light cleaning or used full strength for heavy-duty jobs; spray, scrub, and rinse for fast and effective degreasing results.
•Professional Detailing Strength - Developed for detailers and enthusiasts who need maximum performance; trusted by shops worldwide for tackling the dirtiest jobs with speed and reliability.
•Fresh Citrus Formula - Infused with a signature orange scent that makes tough cleaning more enjoyable; leaves behind a fresh, clean finish after degreasing engines, wheels, and tools.

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$11.99

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CRC

CRC 05483 Heavy Duty Pro-Strength Degreaser, 20 Wt Oz, [1 Pack]

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•FORMULA: CRC Heavy Duty Pro-Strength Degreaser foaming water-based formula is aggressive yet gentle enough for various applications. It's no- odor avoids a harsh chemical smell.
•APPLICATIONS: Automotive parts, exteriors, interiors, maintenance equipment, painted surfaces, chrome and stainless steel metallic parts and heavy machinery
•PRODUCT SPECIFICATIONS: CRC Heavy Duty Pro-Strength Degreaser is available in a 20 wt. oz. aerosol can with a quantity of 12 cans per case.
•CRC INDUSTRIES: A market leader that offers impeccably designed chemical solutions to maintain, protect and repair different marine, heavy-duty motor vehicles, industrial-grade engines, household tools, and electrical equipment.
•CRC INDUSTRIES: A market leader that offers impeccably designed chemical solutions to maintain, protect and repair different marine, heavy-duty motor vehicles, industrial-grade engines, household tools, and electrical equipment.

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$9.48

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Zep

Zep Cherry Bomb Auto+ Degreaser & Cleaner - For Auto, Marine, RV, & Home - 32 oz.

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Powerful Degreasing: Quickly breaks down heavy oil, grease, dirt, and grime on contact for fast, thorough cleanup in demanding environments.
•Surface Versatility: Formulated for use on fiberglass, steel, chrome, stainless steel, painted metal, rubber, and finished concrete for wide-ranging performance.
•Application Flexibility: Perfect for cleaning vehicles, RVs, boats, grills, appliances, garage doors, and shop tools with minimal effort.
•Home Ready: Also effective for use in household areas like trash cans, garage floors, and utility spaces that need degreasing.
•Signature Scent: Leaves behind a bold cherry fragrance that neutralizes tough odors and refreshes workspaces after use.

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$5.98

$9.99

-40%

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WD-40 Specialist

WD-40 Specialist Machine & Engine Degreaser Foaming Spray, 18 OZ

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Powerful degreaser removes oil, dirt, grime, and grease from machinery and all types of engines
•Low-residue, water- based foaming formula penetrates deep into crevices for completely clean results
•Recommended application areas include auto and truck engines, industrial machinery, and farm equipment
•Nozzle sprays degreaser up to 5 ft. for long-distance application. It sticks to whatever you spray it on. Included straw creates a precision stream of cleaner for controlled application
•In independent laboratory testing, WD-40 Specialist Machine & Engine Degreaser Foaming Spray outperforms the leading competitors

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$8.39

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KRAKEN BOND

KRAKEN BOND Engine Cleaner Spray - (2x12.3 fl. Oz) Degreaser for Engine Bay, Gunk, and Motor | 2 Pack

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Engine Degreaser: Kraken Engine Cleaner is a great product for removing burned oil from around the edges of your valve covers or the dirt cooked onto the top of the engine cover.
•Quick & Effective: Using this engine brightener involves simply and quickly spraying it on the dirty area and taking a microfiber towel to it to help break up any stubborn solids. 𝗡𝗲𝘃𝗲𝗿 𝘀𝗽𝗿𝗮𝘆 𝘁𝗵𝗲 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗼𝗻 𝗮 𝗵𝗼𝘁 𝗲𝗻𝗴𝗶𝗻𝗲.
•Great Content: For particularly tough jobs, our engine degreaser offers super strength cleaner degreaser, and for the majority of vehicles, this original bright will get your under-hood area looking like new.
•All Types of Engines: It is suitable for automobiles, motorcycles, machines, and all types of engines, such as lawnmowers. Specifically designed to remove deposits that might cause rough idle, stalling, hesitation, pings, rust, dirt, and engine run-on.
•Safety Protection: Contain ozone-friendly propellants that do not harm the environment. Harmless for electronic circuits. It will not harm the motor in any way. Aside from cleaning, it provides a wonderful view and protects the engine.

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$14.99

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Gunk

Radiator Specialty Gunk FEB1 18 Oz Engine Brite Foam Degreaser

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Radiator Specialty Gunk FEB1 18 Oz Engine Brite Foam Degreaser

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$13.08

$13.74

-5%

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Griot's Garage

Griot's Garage Engine Cleaner for Car, Motorcycle, Boat, RV, and Truck, Oil, Dirt, and Grime Remover, 11158, One Gallon

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•POWERFUL CAR ENGINE CLEANER: Breaks down tough oil, grease, and grime fast for a cleaner engine bay
•EASY-TO-USE: Just spray on this car engine degreaser, agitate with a brush, and wipe away; No heavy scrubbing required
•VERSATILE ENGINE BAY CLEANER: Works great on engine components, wheel wells, undercarriages, and more for all-around car engine detailing
•MAKES YOUR ENGINE LOOK DETAILER-FRESH: Our car engine gunk cleaner lifts away buildup and residue to help your powerplant make a great first impression
•PROFESSIONAL-GRADE ENGINE COMPARTMENT CLEANER: This engine cleaner spray is compatible with our Citrus Multi-Surface Cleaner to tackle even the most neglected engine bays with ease

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$35.99

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SONAX

SONAX Engine Cleaner | Powerful Engine Degreaser for Oil & Grease Removal | Safe on Metal, Plastic & Rubber | Phosphate & Solvent-Free Formula | Deep-Cleaning for Hard-to-Reach Areas | 543200 | 500 ml

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•POWERFUL ENGINE DEGREASER FOR TOUGH GREASE & GRIME: SONAX Engine Cleaner quickly dissolves and removes oil, grease, and dirt from engines, machines, assembly parts, and tools, restoring a clean, like-new appearance.
•SAFE ON METAL, PLASTIC & RUBBER SURFACES: Formulated to be gentle on all engine bay components, SONAX Engine Cleaner won’t stain or discolor air conditioning lines, brake lines, or plastic covers.
•PHOSPHATE & SOLVENT-FREE FORMULA: Eco-friendly and safe for regular use, the non-toxic formula ensures effective cleaning without harsh chemicals that could damage engine parts.
•EXCELLENT PENETRATION FOR HARD-TO-REACH AREAS: With its outstanding infiltration ability, this cleaner reaches even the most inaccessible areas, ensuring a complete and thorough clean without scrubbing.
•IDEAL FOR ENGINE DETAILING & MAINTENANCE: After degreasing, follow up with a protective trim detailer to restore shine and maintain rubber and plastic surfaces. Perfect for professional detailers and DIY enthusiasts alike.

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$16.55

$18.52

-11%

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With our cutting-edge technology, we examine thousands of products and retailers, assessing reviews, ratings, trends, and sales rankings to identify what matters most to users like you.

Our team evaluates this data alongside genuine user feedback, merging AI analysis with human insights to provide you with real-time, highly-rated recommendations that empower your decision-making with clarity and confidence.