11 Best Engine Degreasers – Reviews and Buying Guide

Best Engine Degreaser

Using a good engine degreaser on your car's engine keeps it neat and in top form. It's simply not enough to polish and wax your car's exterior or interior while the engine itself remains covered in gunk.

Engine detailing is an important part of taking care of your car but unlike other parts of your car though, you can't just use soapy water and an old rag on the engine. You need something special to get the job done.

Engine degreasers are specially formulated to help you get rid of the dirt in your car's engine easily and effectively.

The different manufacturers out there each have their special degreaser formulas. This makes it difficult for a first timer to choose correctly and that's where this engine degreasers review comes in. It gives you a list of the top degreasers in the market and shows you how to choose correctly.

11 Best Engine Degreasers Reviews

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PRODUCT

​FEATURES

Chemical Guys CLD_201_16 Signature Series Orange Degreaser

1. Chemical Guys CLD_201_16 (Professional Strength & Fast Working Formula)

  • Highly concentrated formula
  • Works fast and deeply
  • Universal degreaser works on a range of materials
Gunk EB1CA Original Engine Degreaser

2. Gunk EB1CA (Very Popular and Best-selling Engine Degreaser)

  • Fast working formula
  • Comes in easy to use aerosol can
  • Rinses clean with water
Spray Nine 22732 Heavy-Duty Grez-Off Degreaser

3. Spray Nine 22732 (Heavy-duty Engine Degreaser in Spray Bottle)

  • Biodegradable, non-acidic, and non-flammable formula
  • Bottle includes a spray-head
  • Safe on plastic, rubber, chrome e.t.c
Krud Kutter KK32 Concentrated Engine Degreaser

4. Krud Kutter KK32 (Water-based & Biodegradable Engine Degrease)

  • Environmentally friendly formula
  • Fast acting & concentrated formula
  • Safe on all materials
Meguiar's D10801 1-Gallon Super Degreaser

5. Meguiar's D10801 (Strong & Fast Acting 1-Gallon Engine Degreaser)

  • Concentrated formula for heavy-duty work
  • Large 1 gallon container saves money
  • Nice smelling degreaser
SuperClean Multi-Purpose Engine Degreaser

6. SuperClean (Super Degreaser against Tar, Oil, Wax, & Grime)

  • Industrial strength & fast acting degreaser
  • Biodegradable & phosphate-free formula
  • Comes in convenient spray bottle
Oil Eater Original Engine Degreaser

7. Oil Eater AOD1G35437 (Non-toxic & Non-corrosive Concentrated Degreaser)

  • Biodegradable and non-toxic formulas
  • Good for all materials
  • Package includes a dilution chart
Simple Green 19128 Industrial Degreaser

8. Simple Green 19128 (Your Best Choice for Fragrance-free Cleaning)

  • Biodegradable formula
  • Easily rinses off with water
  • Completely fragrance-free formula
Purple Power 4320P Industrial Strength Engine Degreaser

9. Purple Power 4320P (Industrial Strength & Concentrated Cleaner)

  • Highly concentrated and strong formula
  • Safe on most surfaces
  • Biodegradable and non-flammable
Trewax Natural Orange Engine Degreaser

10. Trewax Citrus Magic (Heavy-duty Cleaner with Refreshing Citrus Scent)

  • Made from natural citrus solvents
  • Completely environmental friendly formula
  • Bottle includes a spray head
CRC Aerosol Citrus Engine Degreaser

11. CRC 05027 (Powerful & Low VOC Citrus Engine Degreaser Formula)

  • Dissolves grease in seconds
  • Low VOC formula
  • Smells very nice

PRODUCT

1. Chemical Guys CLD_201_16

(Professional Strength & Fast Working Formula)

Chemical Guys CLD_201_16 Signature Series Orange Degreaser
  • Highly concentrated formula
  • Works fast and deeply
  • Universal degreaser works on a range of materials

2. Gunk EB1CA

(Very Popular and Best-selling Engine Degreaser)

Gunk EB1CA Original Engine Degreaser
  • Fast working formula
  • Comes in easy to use aerosol can
  • Rinses clean with water

3. Spray Nine 22732

(Heavy-duty Engine Degreaser in Spray Bottle)

Spray Nine 22732 Heavy-Duty Grez-Off Degreaser
  • Biodegradable, non-acidic, and non-flammable formula
  • Bottle includes a spray-head
  • Safe on plastic, rubber, chrome e.t.c

4. Krud Kutter KK32

(Water-based & Biodegradable Engine Degrease)

Krud Kutter KK32 Concentrated Engine Degreaser
  • Environmentally friendly formula
  • Fast acting & concentrated formula
  • Safe on all materials

5. Meguiar's D10801

(Strong & Fast Acting 1-Gallon Engine Degreaser)

Meguiar's D10801 1-Gallon Super Degreaser
  • Concentrated formula for heavy-duty work
  • Large 1 gallon container saves money
  • Nice smelling degreaser

6. SuperClean

(Super Degreaser against Tar, Oil, Wax, & Grime)

SuperClean Multi-Purpose Engine Degreaser
  • Industrial strength & fast acting degreaser
  • Biodegradable & phosphate-free formula
  • Comes in convenient spray bottle

7. Oil Eater AOD1G35437

(Non-toxic & Non-corrosive Concentrated Degreaser)

Oil Eater Original Engine Degreaser
  • Biodegradable and non-toxic formulas
  • Good for all materials
  • Package includes a dilution chart

8. Simple Green 19128

(Your Best Choice for Fragrance-free Cleaning)

Simple Green 19128 Industrial Degreaser
  • Biodegradable formula
  • Easily rinses off with water
  • Completely fragrance-free formula

9. Purple Power 4320P

(Industrial Strength & Concentrated Cleaner)

Purple Power 4320P Industrial Strength Engine Degreaser
  • Highly concentrated and strong formula
  • Safe on most surfaces
  • Biodegradable and non-flammable

10. Trewax Citrus Magic

(Heavy-duty Cleaner with Refreshing Citrus Scent)

Trewax Natural Orange Engine Degreaser
  • Made from natural citrus solvents
  • Completely environmental friendly formula
  • Bottle includes a spray head

11. CRC 05027

(Powerful & Low VOC Citrus Engine Degreaser Formula)

CRC Aerosol Citrus Engine Degreaser
  • Dissolves grease in seconds
  • Low VOC formula
  • Smells very nice

1. Chemical Guys CLD_201_16 – Professional Strength & Fast Working Formula

Editor's Rating: 4.4 out of 5 stars (4.4 / 5)

Chemical Guys CLD_201_16 Signature Series Orange Degreaser

Chemical Guys present the best heavy-duty engine degreaser for those on the search for something strong and highly concentrated. This offer comes in a 16-oz bottle with a spray head and you can also get it in 4-oz bottle and in gallons, as well as in a 12 pack.

Made from a citrus based formula, you get a professional strength degreaser that will loosen everything on your engine, as well as the undercarriage, tires and rims, tools, and other machinery.

Being super concentrated, you'll need to dilute it to the ideal concentration for your purposes, and this can get up to 20:1 to prevent destroying sensitive items. You should only use it as it is for the toughest cleaning jobs.

Pros:

  • Professional strength formula for quick action
  • Universal degreaser for engines, machinery, and tools
  • Highly concentrated formula
  • Comes with a spray head and is ready to go

Cons:

  • It's too strong for most plastic items
  • You'll need an extra bottle to dilute it

2. Gunk EB1CA – Very Popular and Best-selling Engine Degreaser

Editor's Rating: 4 out of 5 stars (4 / 5)

Gunk EB1CA Original Engine Degreaser

The Gunk brand is family owned and has been in business for decades, making dependable products for tradesmen and DIY enthusiasts.

As one of the top-rated engine degreasers, this Gunk EB1CA degreaser tackles all kinds of grime, dirt, and grease effectively, cleaning out your engine completely without the need for a tool.

It's a heavy-duty degreaser though, so it works beautifully on many kinds of metallic vehicle engines and parts but it can be a bit too aggressive for plastic engine parts or for home use.

Pros:

  • Quickly and easily removes all forms of grease
  • Intensive formula with powerful solvents
  • Backed by a reputable brand
  • No tool or equipment needed for use

Cons:

  • There is no possibility of diluting this formula
  • ​Not recommended for engines with plastic covers

3. Spray Nine 22732​ – Heavy-duty Engine Degreaser in Spray Bottle

Editor's Rating: 4.2 out of 5 stars (4.2 / 5)

Spray Nine 22732 Heavy-Duty Grez-Off Degreaser

For the best biodegradable engine degreaser, take a closer look at this Grez-Off offer from Spray Nine. Delivered in a 32-ounce bottle with a spray head, it features a biodegradable formula that makes it ideal for eco-friendly buyers.

This is a non-flammable, non-acidic formula which includes absolutely no petroleum solvents and this makes it ideal for more universal uses, including on engines, in the garage, and around the house.

It also has the added advantage of not smelling bad, since it includes no petroleum solvents. You can use it on a range of materials without a single problem, including rubber, plastic, concrete, e.t.c.

Pros:

  • Professional strength formula for good results
  • Biodegradable formula is safe for the environment
  • Comes with a spray head for your convenience
  • Will not damage rubber, plastic, chrome e.t.c.

Cons:

  • It's not the fastest acting degreaser
  • You may have to additionally use a brush

4. Krud Kutter KK32​ – Water-based & Biodegradable Engine Degrease

Editor's Rating: 4.3 out of 5 stars (4.3 / 5)

Krud Kutter KK32 Concentrated Engine Degreaser

Having an engine degreaser for your car is great, but what about having a degreaser that also works perfectly on everything else?

The Krud Kutter KK32 offers you exactly that. It's an engine degreaser with a concentrated commercial-strength formula to remove grease, grime, and all kinds of engine dirt, as well as glue, food and drink stains, chewing gum, shoe polish, and much more.

In addition to being a great universal cleaner, it's also water-based, non-flammable, and totally non-toxic. It's biodegradable, has no hazardous solvents, and works well on carpets, furniture, concrete and on many more materials.

Pros:

  • Water-based & environmentally friendly formula
  • Safe for universal use at work and home
  • Concentrated formula for fast action
  • Works on all materials including metals, tiles, & furniture

Cons:

  • Its high-quality formula does come at a price
  • This bottle may be too small for certain projects

5. Meguiar's D10801​ – Strong & Fast Acting 1-Gallon Engine Degreaser

Editor's Rating: 4.5 out of 5 stars (4.5 / 5)

Meguiar's D10801 1-Gallon Super Degreaser

Meguiar's is another respected brand in the car detailing industry and this offer from the company also commands some respect. It's 1-gallon of Meguiar's highly-effective super degreaser and it's offered at a low and attractive price.

Its strong and fast-acting formula makes it perfect for the toughest jobs, while its pleasant herbal fragrance makes it a pleasure to clean with. It also cleans without leaving any residue behind.

You are free to dilute it to any concentration level before using it. You'll need a smaller bottle though, and preferably with a spray head for convenience, but it's not included in the offer.

Pros:

  • A highly concentrated formula for heavy-duty degreasing
  • The fast-acting formula breaks down dirt with ease
  • Comes in a 1-gallon container for super savings
  • Pleasantly perfumed and leaves no residue

Cons:

  • Dilution bottle is not included
  • It comes without a spraying possibility

6. SuperClean​ – Super Degreaser against Tar, Oil, Wax, & Grime

Editor's Rating: 4.5 out of 5 stars (4.5 / 5)

SuperClean Multi-Purpose Engine Degreaser

How about an industrial strength degreaser that's phosphate free and completely biodegradable? It comes in a simple 32-oz bottle with a spray head and its price is good too.

This multi-purpose degreaser from SuperClean features one of the most powerful water-based degreaser formulas and each bottle comes with a full strength concentrate, which you can thin down according to your needs.

You can use the full strength for instance, on your car's engine, undercarriage, and other parts, while you'll need a 3:1 dilution for carpets, and an 8:1 dilution for upholstery and dashboards. For porcelain, chrome, and stovetops, you'll need a 16:1 ratio of this best engine degreaser spray.

Pros:

  • A powerful water-based formula for instant action
  • Phosphate-free and completely biodegradable
  • Can get diluted down to a 16:1 ratio as needed
  • Ideal for universal application

Cons:

  • It's not as effective as petroleum-based formulas
  • This 32-oz volume will not last long for engine cleaning

7. Oil Eater​ AOD1G35437 – Non-toxic & Non-corrosive Concentrated Degreaser

Editor's Rating: 4.1 out of 5 stars (4.1 / 5)

Oil Eater Original Engine Degreaser

Oil Eater is a great name that perfectly illustrates this degreaser's formula. It's a concentrated formula that comes with a dilution chart so you can know how much water to add.

It eats oil on industrial machinery, floors, tools, and household items like carpets, floors, concrete and more. It doesn't work well on certain materials like sued and warm aluminum though.

Since it's biodegradable, you can use it anywhere without any worries, including in septic systems and other areas of your car apart from the engine.

Pros:

  • Easily and safely dissolves all forms of grease
  • Based on a non-toxic formula
  • Good for both machinery and around the home
  • Comes with a dilution chart for the perfect strength

Cons:

  • It does not work well on glass, leather, and suede
  • Dilution bottle & spray head not included

8. Simple Green 19128 – Your Best Choice for Fragrance-free Cleaning

Editor's Rating: 4.5 out of 5 stars (4.5 / 5)

Simple Green 19128 Industrial Degreaser

This Simple Green degreaser offer is the best engine degreaser for those who need a fragrance-free solution. The solution comes with no color and no fragrance, and it's non-flammable, non-corrosive, and biodegradable as well.

Another peculiar aspect of this offer is that it's also available in a 6-pack of 1-gallon bottles of the solution. This puts its price rather high but you can also opt for a single 1-gallon bottle if you like.

This concentrate is versatile and easily finds use in many industries asides from cleaning your engine and parts.

Pros:

  • Formulated for fragrance-free applications
  • It's also color free, biodegradable, and non-flammable
  • ​Also available in a 6-pack for super savings
  • Great for general degreasing work

Cons:

  • ​There are cheaper offers
  • Package does not include applicator bottle

9. Purple Power 4320P – Industrial Strength & Concentrated Cleaner

Editor's Rating: 4.3 out of 5 stars (4.3 / 5)

Purple Power 4320P Industrial Strength Engine Degreaser

Here's another good engine degreaser that's offered at a great price in a one-gallon bottle. This is a concentrated formula, so you'll have to dilute it according to your needs and it also creates a barrier between the stain and the material's surface.

This offer is one of the best industrial engine degreasers and it's so powerful that all it needs to get rid of most stains and dirt is mere seconds.

Feel feel to use it on other parts of your car and on other items as well. It's biodegradable, phosphate-free, and non-flammable. Avoid use on glass and painted surfaces though.

Pros:

  • The fast-acting and concentrated formula works in seconds
  • Works on a range of surfaces & materials
  • Biodegradable, non-flammable and phosphate-free

Cons:

  • It's too corrosive for glass and painted surfaces
  • Comes with no spray head

10. Trewax​ Citrus Magic – Heavy-duty Cleaner with Refreshing Citrus Scent

Editor's Rating: 4 out of 5 stars (4 / 5)

Trewax Natural Orange Engine Degreaser

Although it's not the best automotive degreaser on this list, this offer from Trewax is still one of the best heavy-duty engine degreasers out there and it comes with its advantages.

First of all, it's made using natural citrus solvents and this makes it very environmentally friendly.

A second advantage is that it's a universal cleaner, which means you can use it to clean your kitchen countertop, carpet, concrete, and furniture, in addition to your car's engine and other parts.

As long as a surface is washable, you can use this cleaner on it without any worry that it might get too corrosive or damage the surface in any way.

The only issue you'll have to deal with is that this formula is not as fast acting as the other formulas, but it surely will get the job done in its time.

Pros:

  • Heavy-duty degreaser made from natural citrus solvents
  • Non-toxic and biodegradable formula
  • Includes a natural citrus scent
  • Comes with a convenient spray head

Cons:

  • It's not the most intense degreaser
  • Not ideal for people with citrus allergy

11. CRC ​05027 – Powerful & Low VOC Citrus Engine Degreaser Formula

Editor's Rating: 4 out of 5 stars (4 / 5)

CRC Aerosol Citrus Engine Degreaser

This CRC degreaser combines the power of citrus-based degreasers with a petroleum base to create one of the best engine degreaser cleaners that works very quickly and effectively.

CRC adds a pleasant citrus scent to the formula, so you can always enjoy your cleaning session and it leaves absolutely no residue when it dries.

This formula is a heavy-duty degreaser and as such, you should ​be careful when you're dealing with plastics and paints, because it can get corrosive.

Else, it's very user-friendly in its aerosol can, including its comfortable 360-degree spray valve for your convenience. It's certified for use in both automobile garages and in meat and poultry plants, but remember that it's got a petroleum base.

Pros:

  • Comes in a convenient aerosol spray can
  • Heavy-duty degreaser is citrus and petroleum based
  • Dissolves dirt and grease in seconds
  • Features a pleasant citrus smell

Cons:

  • Can't get diluted because it's aerosol
  • ​It's not biodegradable

​How to Buy the Best Engine Degreasers

​The Best Engine Degreaser Buying Guide

Given the peculiar nature of engine degreasers, you'll need to understand their most important features, so you can make the right decision ​and buy the best engine degreaser for your car.

#1. Water vs. Petroleum-Based Degreasers

There are two major types of degreasers based on how they get made. The first type is water-based degreasers, while the second type is petroleum-based degreasers.

Petroleum-based Degreasers. Petroleum-based engine cleaners get made using natural mineral oils and this gives them two distinguishing features. The first feature is that they are affordable because petroleum is relatively abundant.

The second feature is their raw power. This is both an advantage and often a disadvantage because while petroleum degreasers clean very well, they're often very abrasive and can damage certain non-metallic engine parts that they come in contact with.

Water-based Degreasers. As the name suggests, water-based degreasers get made using a formulation that adds different solvents to a water base. This makes them costlier than petroleum-based degreasers, but it also gives them an advantage.

Being water-based makes this kind of degreaser milder and this does not cut their cleaning powers though, but it makes them friendlier to other car parts that might otherwise get damaged from accidental spills of the more abrasive petroleum degreasers.

Water-based degreasers are usually also more environmentally friendly, so you don't have to worry about their run-offs, but you'll have to pay more for them than for the petroleum-based types.

#2. Smell

Nearly all of the best automotive engine degreasers will have one peculiar smell or the other. Some will be more bearable than the others, while you could find others nearly unbearable, especially the petroleum-based types.

These are two things you can do here if the smell bothers you or is of importance to you. Firstly, you could invest in a dust mask to cut down on the smell and secondly, you can choose a perfumed degreaser.

#3. Multi-Purpose Degreasers

Here's another question that you'll need to ask yourself right from the beginning. Do you want a degreaser that's just for your car's engine or do you want a product that you can also use around the garage or even in the house?

A degreaser that's specific for the car engine will definitely clean your engine more effectively. A multi-Purpose degreaser, however, will be milder so it can work on different materials but then, it also offers you lots of value for your money.

#4. Multi-Surface Degreaser

Depending on whether you need a multi-purpose degreaser or one that's specially formulated for engines, you'll need to pay attention to its label to find out which materials it works on and which materials to avoid.

#5. Safety

A good degreaser should clean up your engine without damaging any engine part or your hands. You'll need to check the chemical composition of the degreaser formula for this and make sure that it doesn't contain anything harmful to your or any part of your car.

#6. Volume & Price

More volumes of any formula usually mean a higher price and so it goes for engine degreasers as well. You'll have to decide just how much solution is enough for you beforehand.

Some manufacturers will bundle two or more bottles in a package to offer volume-buy deals. You'll also need to decide how much degreaser you need beforehand, so you'll know if a volume purchase would make sense for you.

How to Clean An Engine using a Degreaser

How to Clean An Engine using a Degreaser

Now that you know how to choose the proper degreaser for your car's engine, it's also important that you know how to use it properly.

Following is a step by step guide that shows you how to use a degreaser to clean your car's engine.

Things you'll need:

  • An engine degreaser of your choice
  • A brush with strong bristles
  • A water hose
  • Plastic bags or other shielding materials

Step 1: Preparation

Before you begin with the cleaning process, you'll need to make initial preparations to make sure that things go well. These preparations will include the cover-up of all electrical parts in the engine because they are often sensitive to degreasers, especially the petroleum-based type.

You can use plastic bags or anything else that you've got handy to cover up items like the fuse box, electronic control systems, filters, and anything else that you know needs some level of protection.

You'll also need to make sure that you've got running water nearby to rinse the engine with and if the engine is hot, let it cool off first before starting to wash it.

Step 2: Dilution

This is an optional step and you may only have to do it if you're using a petroleum-based degreaser and you want to avoid its full power to prevent it from potentially damaging fragile parts in your car.

Step 3: Application

After you've set the stage and gotten the right concentration for your degreaser, it's now time to begin applying the solution to the engine. You want to spread the solutions evenly as possible and to keep all the necessary engine parts soaked.

Depending on how dirty the engine is, it may or may not be long before the particles begin falling off by themselves. You can now join in with your brush for the most shine and scrub all the areas that you feel may need a little help.

Step 4: Wash-Off

You can start washing off the degreaser once you're satisfied with how much work it has done on your engine. Simply wash it off with your water hose until the engine is fully rinsed.

A nice tip for getting the best results is not to let the degreaser dry out on your engine at any time, but to rather always keep it wet until you start rinsing it out.

Also, consider the environment. If you're using a water-based degreaser, then you probably have nothing to worry about, but if you're using a petroleum-based degreaser, then you'll need to make arrangements to dispose of the wastewater properly.

Read More: 5 Best Engine Flushes

Conclusion

We've come to the end of our best engine degreasers review and you've seen the best products out there, each with its unique features and advantages.

As you might have guessed by now, some degreasers are so perfect for certain situations that there's hardly a single best engine degreaser.

What you need to do, therefore, is to make your choices based on your needs, like toxic vs non-toxic, heavy-duty vs mildness and universal use, as well as on scent and odor options.

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