Top 11 Best Engine Degreasers [2020]

The engine has a lot of fluids flowing through it, and since it vibrates when it is running, some of the fluids may seep through the seals. Also, accidental spills may occur when you are changing the oil.

With time, a greasy coat may form around the engine, making it look less appealing. To add to this, other particles such as dust, gunk, and grime may build-up on various sections of the engine, thus limiting heat dissipation.

If this occurs for a long time, the engine may start heating up, resulting in serious engine complications. However, you can avoid this by using a degreaser from time to time. To make things easier for you, here are the best engine degreaser that will make your engine look new.

11 Engine Degreaser Reviews

#1 Simple Green 19128 Crystal Industrial Cleaner/Degreaser

Simple Green 19128 Crystal Industrial Cleaner/Degreaser

This highly concentrated degreaser from Simple Green is one of the formulas that you can rely on when handling parts that require serious cleaning. In as much as this product is tough on greasy stains and dirt, it is very friendly to the environment. And that is one of the main reasons why most people prefer using this product. It is made up of strong solvents, which breakdown the molecular structure of grease residues, thereby allowing you to wipe off the stains effortlessly. This product has no added colors, so it won’t discolor parts of the engine or damage them.

You can use this formula to clean almost every part of the engine since it is friendly to metal, plastic, and rubber surfaces. The manufacturers have used potent ingredients in formulating this product, hence giving it its industrial strength. As such, it can be used in a wide range of applications. Unlike most degreasers, which are heavily scented, this formula has no added scent. As such, it won’t irritate your nasal cavity during application. More to this, it is non-flammable, making this one of the safe cleaning agents that you can consider using.

To make it even better, the formula can be diluted using water, thus allowing you to customize the concentration of the solution according to your cleaning requirements. Besides, the product comes in a large 1 Gallon bottle, so you will have enough of the solution to clean several engine parts. If you use this formula as directed, your engine will come out sparkling clean. This is an all-purpose degreaser, so you can even use it when cleaning bicycle chains and other mechanical parts.

Pros
  • Biodegradable
  • Non-toxic
  • Water-based formula
  • Versatile
Cons
  • Not self-rinsing

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#2 Chemical Guys CLD_201_16 Signature Series Orange Degreaser

Chemical Guys CLD_201_16 Signature Series Orange Degreaser

The Signature series orange degreaser by Chemical Guys is an advanced formula, which cleanses greasy surfaces and eliminates any unwanted residue. This formula contains powerful additives, which work in unison to ensure that dirty surfaces are left spotlessly clean. The citrus extract infused in this formulation contains d-limonene, a potent solvent, which has the ability to cut through grease and grime. As a result, all the dirt will be washed off from the engine by simply directing the spray to the affected parts.

Additionally, the hyper surfactants in this product will ensure that the bond between grease molecules and the dirty surface is weakened through an emulsification process. This facilitates fast and easy washing of various parts of the engine. Since the formula is super-concentrated, it can remove even the toughest stains that have built up over the years. You can also use this product when cleaning the rim of your car. It will scrape off all the dirt and bring back the lost shine to your wheels.

Moreover, you can also apply this formula to gunk infested parts since it is very good at breaking down unwanted elements. Depending on how tough the job is, you can use the full strength of the formula, or dissolve it. Either way, the product will deliver exceptional results that will leave you impressed. This cleaner can also come in handy when cleaning dirty tools and other pieces of equipment that are extremely dirty.

Pros
  • Easy to apply
  • Pleasant citrusy scent
  • Good at what it does
  • Fast-acting formula
Cons
  • The liquid has a low viscosity, so most of it runs off and is wasted
  • The bottle is not as durable

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#3 Purple Power (4320P) Industrial Strength Cleaner and Degreaser

Purple Power (4320P) Industrial Strength Cleaner and Degreaser

This versatile formula has a unique action property in that it works by creating a barrier between the grease molecules and the affected surface. This way, the greasy stains won’t be in direct contact with the surface, thus allowing easy clean-offs. The product will start working on the stains seconds after application, so your items will be clean in no time. It is this fast penetration feature that makes a dependable degreaser. Also, its use can be applied in different places such as auto shops, farms, garages, etc.

Since the formula is very powerful, you only need a small portion to get the job done. As a safety measure, ensure that you wear gloves, eye goggles, and other protective gear that will help you keep the solution away from your skin. But most importantly, you must use the formula according to the manufacturer’s instructions. Through this, you will be able to know the materials that the formula is compatible with.

If applied correctly, this product will help you remove all sorts of stains including those that are deeply embedded into surfaces. Apart from being an excellent cleaner and degreaser, this product is biodegradable, so it does affect the environment. This industrial degreaser will assist you in cleaning both small and large machine parts.

Pros
  • Phosphate-free
  • Non-abrasive
  • Non-flammable
  • Effective cleaning power
Cons
  • May damage the paint on the car
  • Require thorough rinsing

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 #4 WD-40 Specialist Industrial-Strength Cleaner & Degreaser

WD-40 Specialist Industrial-Strength Cleaner & Degreaser

The water-based degreaser from WD-40 is loaded with effective bio-solvents, which breaks through grime and greasy stains in an instant. This formula is available in five different container sizes, so you can choose the one that favors your budget. With this product, you will have an easy time cleaning car engines, industrial machinery, tools, and other automotive parts. This formula is tough on annoying stains but is very gentle on a wide range of materials. As such, it can be used on plastic, aluminum, chrome, and granite surfaces without causing any damage.

This will allow you to clean various parts of the engine without worrying about them being dissolved away or corroded. Besides, the formula contains corrosion inhibitors, which prevent destructive elements such as flash rust from damaging surfaces. In addition, this product is NSF compliant so you can use it knowing that your health is not at risk. The bottle has a shatter-resistance trigger, which delivers the solution to target areas with exact precision.

To add to this, there is a refill port at the side of the bottle, which allows you to top the solution without spilling some. You can transform the appearance of your engine by using this non-aerosol cleaner. If you like, you can extend its use to other parts of the car such as the rims to get a neat looking car.

Pros
  • Can be applied to sensitive surfaces
  • Low-odor
  • Industrial-strength
  • Multi-surface
Cons
  • May not be as effective on certain types of grease

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#5 KRUD KUTTER KK32 Original Concentrated Cleaner/Degreaser

KRUD KUTTER KK32 Original Concentrated Cleaner/Degreaser

The KK32 is an all-purpose degreaser that will help you remove grease from almost all surfaces regardless of the material. This degreaser comes in an ergonomically designed bottle, which has a rugged surface to provide you with maximum grip when squeezing the trigger. The spray design is very easy to use and will provide you with a spill-free user experience. If you are looking for a cleaner that you can use both indoors and outdoors, the Krud Kutter KK32 will help you handle the task without engaging yourself in rigorous scrubbing.

This formula is highly concentrated and can take on even the most stubborn stains that may be making your engine to look less appealing. It breaks down road grime, oil stains, and other sticky residues that are found on engines. Furthermore, this product can also remove the oxidative layer that may form on metal and aluminum surfaces over time. As a result, the treated surface will end up looking clean as if it is brand new. You can take advantage of this feature by using this formula when cleaning your tools.

Like most water-based degreasers, this product poses no serious threat to the environment and the user. However, you should still take necessary precautions when using the product to prevent underlying allergic reactions that may come about due to direct contact with the chemicals. More to this, you can use this formula when cleaning tiles, barbeque grills, smoke-damaged areas, and many other places.

Pros
  • Not flammable
  • Xylene-free
  • Fast action
  • Non-toxic
Cons
  • The bottle has no refill port compared to some models

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#6 Oil Eater Original cleaner/Degreaser

Oil Eater Original cleaner/Degreaser

This heavy-duty degreaser from Oil eater cuts through greasy stains with the help of its powerful ingredients. Despite being super effective, this product is acid-free, and is, therefore, safe for use on different household and industrial equipment. The 3.78 liter/1gal bottle has a convenient dilution chart at the back, which will assist you in determining the perfect concentration for the task at hand. As such, you can dilute the solution at different intervals depending on the type of stains that you are dealing with.

When dealing with engines, you can mix the formula with water in the ratio of 1:1, while medium-duty cleaning will require a dilution ratio of 1:3, in which 3 is for water. Light cleaning tasks, on the other hand, may require a less concentrated solution, which you can achieve by mixing the degreaser and water in the ratio of 1:20 respectively. This way, you can customize the solute concentration to meet the requirements of various tasks.

Moreover, the formula is non-abrasive, so it won’t scratch or damage the surfaces on which it is applied. Nonetheless, you have to ensure that you use the formula only on compatible surfaces. When it comes to the user’s safety, ensure that you gear up appropriately to avoid skin and eye irritation.

Pros
  • The formula is not corrosive
  • Versatile
  • Biodegradable
  • Formulated with potent surfactants
Cons
  • You have to buy an applicator bottle separately

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#7 Gunk FEB1 Foamy Engine Brite Engine Cleaner

Gunk FEB1 Foamy Engine Brite Engine Cleaner

Most users like this engine degreaser because of its ready-to-use design. No dilution is required, so you won’t have to worry about mixing ratios or the concentration of the formula. The manufacturers have balanced everything for you to ensure that you get a worry-free experience when cleaning your engine. That being said, you can use this degreaser right out of the box. The product comes in a highly pressurized aerosol can, which delivers its contents to dirty surfaces in seconds.

This foamy formula is very powerful and allows you to eliminate road grime, dust, and greasy stains. The container dispenses a solvent-rich foam, which clings to surfaces as it breaks down the unwanted stains. All you have to do is apply the formula to the affected areas in generous amounts. After this, allow the foam to soak the stains for about 10-15 minutes, followed by an intense rinse.

The formula is not only good at cleaning car engines but can also assist you in removing stains from a variety of equipment such as lawnmowers, motorcycles, tractors, etc. Before applying the formula, ensure that you shake the can thoroughly so that all the ingredients can mix properly for maximum cleaning results.

Pros
  • Does not damage the plastic covers found on some engines
  • No need to scrub after application
  • Removes gunk
  • Does not affect rubber seals
Cons
  • Requires you to cover electrical components

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#8 Meguiar’s D10801 Detailer Super Degreaser GA

Meguiars D10801 Detailer Super Degreaser

Meguiar’s D10801 is a fast-acting formula that breaks down grease and dirt particles, which may be affecting the aesthetic appearance of your engine and other parts of the vehicle. After the application, you can easily wipe off the liquid from the surface. As you do this, the greasy residue will come off, thereby leaving the surface clean. This product can help you handle tough cleaning jobs effortlessly.

This formula contains powerful ingredients, which destroys the bonds holding the greasy stains together. As a result, all the stains will come off without putting in a serious scrub. More to this, you can use a spray bottle to deliver the solution to the intended areas. The product is friendly to a wide variety of materials including leather. As such, you can use it when cleaning hard-to-remove stains from the interior of your car.

To get the desired results, you have to use the product as directed. Additionally, the product comes in a large container, which will last you a couple of months depending on how often you use the degreaser. This formula can also be used when cleaning home appliances that are oily or coated with soot.

Pros
  • Does not leave any residue on surfaces
  • Has a sweet herbal fragrance
  • The formula is highly concentrated
  • Multipurpose
Cons
  • There is no spray bottle in the package

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#9 Spray Nine 22732 Grez-Off Heavy Duty Degreaser

Spray Nine 22732 Grez-Off Heavy Duty Degreaser

The Spray Nine 22732 is also another great degreaser that you can use when handling heavy-duty cleaning. This formula is nonflammable, so you can use it without worrying about fires. Furthermore, it does not contain harmful petroleum solvents that may damage parts of the engine. The potent constituents making up this product will blast through greasy stains, thus ripping them from the surface.

This feature allows you to clean greasy residues from garage floors, tools, and other items that may have tough stains. The formula is designed in such a way that it cleans, preserves, and restores surfaces to their original state. It will help you improve the condition of condenser rolls, BBQ grills, conveyors, and other industrial equipment.

The spray dispenser bottle will make the application process a breeze and will allow you to make accurate delivery to the dirty parts. This prevents unnecessary wastage of the solution, so every spray that you apply will count. In addition, the formula does not have unpleasant odors, making this an ideal option for people who are sensitive to pungent fumes.

Pros
  • Non-acidic
  • USDA approved
  • Ergonomically designed bottle
  • Has a sensitive trigger spray switch
Cons
  • May require you to scrub the surface being cleaned

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#10 SuperClean Multi-Surface All Purpose Cleaner Degreaser Spray

SuperClean Multi-Surface All Purpose Cleaner Degreaser

This product works as a degreaser and a cleaner, so it will leave your engine looking clean and sparkly. The solution will start working immediately it comes into contact with the stain that you want to remove. Its industrial-strength allows it to break down oil, grime, tar, wax, and grease. As such, this formula can come in handy when cleaning various household items.

It is advisable to follow the manufacturer’s instructions when diluting the formula. However, some tasks may require you to use the full strength of the product. This can particularly apply when you are dealing with stains that have been there for a long time or those that are hard to remove when a regular cleaner is used.

The formula will help you clean stove tops, carpets, and other sensitive surfaces. You will also find this product very effective when it comes to cleaning tires and rims. To add to this, you can use this solution when cleaning bicycle parts such as the sprocket-wheel and the chain. If you are looking for a cleaning solution that is powerful and safe,

Pros
  • Easily degreases
  • Does not contain phosphates
  • Eco-friendly
  • Degreases very fast
Cons
  • The 32-ounce bottle may not be enough when tackling large cleaning projects

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#11 Zep Industrial Purple Degreaser Aerosol 049848

Zep Industrial Purple Degreaser

The industrial degreaser from Zep is a potent formula that will provide you with quality results in less than five minutes. It can easily dissolve heavy greases and tough oily stains with just one application. You can apply the formula generously depending on the type of grease that you are dealing with. Besides, the aerosol can allows you to deliver the formula even in hard-to-reach spots in the engine compartment.

This product works by lifting stains from the surface, thereby making it easier to clean off the remaining residues with a piece of cloth. No serious scrubbing is required when using this product since it can break down stains on its own. However, you have to ensure that you cover the affected area extensively to allow the formula to fully take effect.

Also, the formula can help you remove adhesives from surfaces, thus protecting your items from acquiring scratches. Additionally, this formulation is compatible with auto parts, metal surfaces, concrete floors, etc. More to this, the package comes with two aerosol degreasers that will serve you for a while before purchasing the next pack.

Pros
  • Removes different types of stains
  • Loaded with powerful solvents
  • Easy to work with
Cons
  • Highly flammable
  • The fumes may irritate the yes

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Frequently Asked Questions

Are degreasers harmful?

Yes. Most degreasers can harm you, but only if they are ingested. Also, some may irritate the eyes and skin, so you must ensure that you follow the safety precautions provided by the manufacturer.

When should I degrease my engine?

You can clean your engine every time you notice the build-up of grime, gunk, and other stains. This may vary depending on the environment in which you drive the vehicle.

Are all degreasers flammable?

No. Some degreasers are free of petroleum products, so they cannot catch fire easily. Nonetheless, a good number of degreasers packaged in pressurized aerosol cans are highly flammable, so you have to be cautious when using them.

Can a degreaser damage my engine?

Engine degreasers are tough on greasy stains but are not in any way destructive to the engine. Nevertheless, you have to double check on the specifications of the formula to ensure that it is safe for plastic covered engines and rubber seals.

Final Verdict

If you care about your car, you have to clean it from the inside out. This includes cleaning everything that is under the hood and other parts that may have greasy stains.

You can achieve this by giving the degreasers listed above a try. They will assist you in cleaning the engine, rims, tires, and tools.

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