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Top rated automotive engine degreasers
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Best overall
Gunk Original Engine Degreaser
Powerful foam cleans grease and grime without harsh odors; safe on most engine components.
- Effective foam
- Pleasant scent
- Safe on hoses
- May require scrubbing on heavy buildup
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Best value
Chemical Guys Signature Series Orange Degreaser
Versatile concentrate dilutes for various cleaning levels; citrus-scented and biodegradable.
- Adjustable strength
- Citrus scent
- Biodegradable
- Requires dilution
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Professional grade
Meguiar's Super Degreaser D10801
High-concentrate formula cuts tough grease and grime; safe for clear coat and painted surfaces.
- Strong concentrate
- Safe on paint
- Versatile
- Strong smell
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Best aerosol
CRC Heavy Duty Engine Degreaser
Fast-acting spray penetrates and emulsifies grease; rinsed off with water.
- Aerosol ease
- Fast acting
- No residue
- Small can size
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Best foam
Gunk Foamy Engine Brite Degreaser
Thick foam clings to vertical surfaces for deep cleaning; citrus scent.
- Cling foam
- Citrus scent
- Easy rinse
- Not as strong on heavy oil
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Eco-friendly
Simple Green Pro HD Heavy-Duty Cleaner
Non-toxic, biodegradable concentrate safe for engines and the environment.
- Non-toxic
- Biodegradable
- Multiple uses
- Needs dilution
- May require more effort
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Heavy duty
3M Citrus Base Cleaner
Industrial strength cleaner with natural citrus solvent for tough grease and oil.
- Powerful cleaning
- Citrus solvent
- Concentrated
- Strong smell
- Can be harsh on skin
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