10 Best Engine Degreasers Of 2026
Engine Degreasers — Reviews, Recommendations & Updated Buying Guide September 2026
Chemical Guys CLD_201_16 Signature Series Orange Degreaser
Why We Love It
3D Grand Slam Engine Degreaser
Why We Love It
CRC Heavy Duty Pro-Strength Degreaser Spray - All-Purpose
Why We Love It
WD-40 Specialist Machine & Engine Degreaser Foaming Spray
Why We Love It
Gunk Engine Degreaser, Original Degreaser Cleaner Spray
Why We Love It
KRAKEN BOND Engine Cleaner Spray - (2x12.3 fl
Why We Love It
WD-40-300281 Specialist Industrial Strength Degreaser
Why We Love It
Chemical Guys, Citrus Degreaser Aerosol
Why We Love It
Chemical Guys Signature Series Orange Degreaser Spray
Why We Love It
KRAKEN BOND Engine Cleaner Spray - (12x12.3 fl
Why We Love It
Quick Pick
10 Best Engine Degreasers Of 2026
Quick Pick
Chemical Guys CLD_201_16 Signature Series Orange Degreaser (16 oz) | Heavy-duty citrus degreaser breaks down grease and oil on engines, tires, tools and undercarriages, dilutable
3D Grand Slam Engine Degreaser - 1 Gallon | Heavy Duty Industrial Cleaner & Degreaser | Removes Grease & Oil | Non Toxic & Biodegradable | Made in USA | All Natural | No Harmful Chemicals
CRC Heavy Duty Pro-Strength Degreaser Spray - All-Purpose - 20 oz | Water-Based, Industrial-Strength, Engine and Automotive Parts Cleaning, Grease, Grime and Oil Removal
WD-40 Specialist Machine & Engine Degreaser Foaming Spray, 18 OZ [4-Pack] | Industrial Strength, Friction-Reducing, Lubricant for Corrosion Protection on Table Saws, Drills and Lathes
Gunk Engine Degreaser – Original Degreaser Cleaner Spray – Quickly Removes Tough Oil & Grease – Cleans Hardworking Engines – Rinses Easily with Water – 15 oz (Case of 6)
KRAKEN BOND Engine Cleaner Spray - (2x12.3 fl. Oz) Engine Degreaser for Engine Bay, Gunk, and Motor | 2 Pack
WD-40-300281 Specialist Industrial Strength Degreaser Fast-Acting Formula with PowerSolve Technology and SMART STRAW SPRAYS 2 WAYS, 15 OZ
Chemical Guys, Citrus Degreaser Aerosol, Industrial Engine Cleaner, 18 oz | Industrial-strength citrus aerosol breaks down grease, oil and grime on engines, tools and undercarriages
Chemical Guys Signature Series Orange Degreaser Spray - Heavy Duty All Purpose Cleaner for Engines, Tires, Undercarriages, Tools and More, Professional Strength, Breaks Down Grease, Oil & Grime,128 oz
KRAKEN BOND Engine Cleaner Spray - (12x12.3 fl. Oz) Engine Degreaser for Engine Bay, Gunk, and Motor | 12 Pack
Buying Guide: Engine Degreasers
📋 Table of Contents
1What concentration of degreaser is most effective for engine cleaning?
Look for degreasers with a concentration of 10-20% active ingredients for heavy-duty engine cleaning. Higher concentrations break down oil and grime faster, but may require more dilution for sensitive surfaces. Lower concentrations are safer for use on painted or rubber parts but may need more time to work.
2Should I choose a biodegradable or non-biodegradable engine degreaser?
Biodegradable degreasers are better for the environment and safer for use in sensitive areas like near water sources. Non-biodegradable options are often more powerful and cost-effective for heavy grease buildup. Choose based on your environmental priorities and the severity of the dirt on your engine.
3What’s the difference between water-based and solvent-based degreasers?
Water-based degreasers are less harsh, easier to rinse, and safer for use around sensitive components. Solvent-based degreasers are more aggressive, dissolve oil faster, and are better for extremely dirty engines. However, they may require ventilation and can damage certain plastics or rubbers if not used carefully.
4How much degreaser do I need for a typical engine clean?
For a standard car engine, a 1- to 2-liter container of degreaser is usually sufficient. Larger engines or those with heavy buildup may need 3-4 liters. Always follow the manufacturer’s dilution instructions to avoid overuse, which can lead to residue or damage.
5Are there any common mistakes to avoid when using engine degreasers?
Never apply degreaser directly to hot engines, as it can cause steam burns or damage sensitive components. Also, avoid using high-pressure washers immediately after applying degreaser, as it can force the cleaner into electrical systems. Always test a small area first and rinse thoroughly to prevent corrosion or residue buildup.
How we choose
Our editors are people who genuinely love testing and writing about products. We compare each product's real-world usability and strengths, then distill what matters most into our own "Why We Love It" points — so you get an honest, at-a-glance sense of what counts before you buy.