The 10 Best Engine Degreasers – (Reviews & Buying Guide 2019)

We have all seen those crystal clean engines on ads for used cars, right? In case your engine doesn’t remotely resemble such a beautiful scene, don’t worry – there’s a solution. We encourage you to check out the best engine degreasers out there and test them.

Using such a product isn’t hard at all but it does require some knowledge. This is a very common item and it is out there for you to get and have a sparkling clean engine with a longer life. Our engine degreasers reviews will outline the top 10 finest products on the market so that you can make the right choice. However, our guide also contains plenty of other useful information related to application and safety.

Let’s begin exploring the most distinguished products on the market when it comes to the best engine cleaners. We haven’t arranged the units in any particular order and it is completely up to you to decide which one is best.

  • 4.6 Customer Rating
  • Schaeffer Manufacturing 266 Citrol Cleaner and Industrial Degreaser
  • PRICE $$
  • Size : 12 oz.
  • Weight : 1.2 pounds
  • Contains : Combination of organic citrus based solvents and a multi-component surfactant-emulsifier system
  • 4.4 Customer Rating
  • Chemical Guys CLD_201 Signature Series Orange Degreaser
  • PRICE $$$
  • Size : 1 Gal
  • Weight : 9.1 pounds
  • Contains : Professional strength citrus-based formula
  • 4.4 Customer Rating
  • POR-15 40104 Cleaner Degreaser
  • PRICE $$
  • Size : 1 quart
  • Weight : 2.4 pounds
  • Contains : Water-based non-flammable degreaser
  • 4.3 Customer Rating
  • CRC SX128 Salt Terminator Engine Flush, Cleaner and Corrosion Inhibitor
  • PRICE $$$
  • Size : 1 Gallon
  • Weight : 2 pounds
  • Contains : Biodegradable Formula
  • 4.4 Customer Rating
  • Gunk FEB1 Foamy Engine Brite Engine Cleaner
  • PRICE $$
  • Size : 17 Oz.
  • Weight : 1 pounds
  • Contains : Foaming action

Best Engine Degreaser Reviews – Editors’ Choice

1. Schaeffer Manufacturing 266 Citrol Cleaner and Industrial Degreaser

Schaeffer Manufacturing 266 Citrol Cleaner and Industrial DegreaserThis citrol-based cleaner and degreaser is an effective, suitable product for almost every cleaning operation. Hazardous aliphatic, chlorinated and even alkaline degreasers can easily be ousted by this Schaeffer Manufacturing 266 citrol cleaner. The special combination of organic citrus based solvents makes this product a high-grade choice.

Another characteristic that makes this product unique is its multi-component surfactant-emulsifier system. Having all these impressive qualities, this heavy-duty, citrol concentrate removes perfectly different types of inks, soils, and dirt. It penetrates briskly and the best part is the fact that is totally biodegradable.

If you are a keeper of the planet and the environment you should know that this degreaser does not contain any inadmissible petroleum distillates, hydrocarbons, etc. The Schaeffer Manufacturing 266 citrol cleaner is also waste treatable. Now if you are a car owner or you just have a passion for vehicles you are going to love this next part. Citrol cleaner is also a “five-star” product for auto dealing. It is completely suitable for Auto glass. It will remove pretty much every spot. But there’s more, especially when we speak of auto detailing. This product works great for other things as well. For example, tar removal, paint transfer and so much more.

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2. Chemical Guys CLD_201 Signature Series Orange Degreaser

Chemical Guys CLD_201 Signature Series Orange DegreaserChemical Guys Signature Series Orange Degreaser is a product specially designed for your facilitation. It easily removes oil, dirt, grease, etc., saving you time and effort. It does not matter if it is the toughest spot, grease, grime or whatever, this Signature Series Orange Degreaser will break it down in no time.

In order for you to receive the ultimate versatility, this cleaner has an extremely concentrated formula. That is why our team recommends you to actually dilute the product depending on what you are using it for. The degreaser is apposite for so many different things. If you want to clean your vehicle you can use this product for your engine, tires, even wheels. Just spray down your car’s nasty engine bay and your engine will be as good as new. Your tires are full of dirt and grime? This little thing will give you back their initial black look. And let’s say that your house needs refreshing, this is perfect for floors. Tools, machinery or anything else in your garage or workplace that may need cleaning can be given a polish with this high-quality degreaser. The new and advanced professional citrus formula will emulsify everything that comes in the way of the cleanliness you desire.

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3. POR-15 40104 Cleaner Degreaser

POR-15 40104 Cleaner DegreaserAre you looking at this huge 1-quart bottle and you are wondering how am I even going to apply this product? Well, relax, this cleaner is not only extremely powerful but is also well-designed. It comes with a spray but depending on what you are applying it to, you can use a stiff brush, microfiber cloth, rag and so on.

Now, back to how strong this degreaser is, the only thing our team can say for sure is that this big buddy cleans up like a champ. The disadvantage here is that the price of the product is a bit higher than the average ones. That does not mean it is not a good investment. You can easily use this POR-15 40104 cleaner on engines, holding tanks, fuel tanks, grease traps, etc. Not even wood, plastic, fiberglass or painted surfaces will stop this thing. Don’t forget to follow each step of the directions for prep and paint application in order to make it last. This non-flammable degreaser is also water-based, so another advise we could give you is to use it with hot water. The 50/50 dilution with water is a perfect choice. Some kind of respiratory protection would also be a good decision as this product has very strong fumes.

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4. CRC SX128 Salt Terminator Engine Flush, Cleaner and Corrosion Inhibitor

CRC SX128 Salt Terminator Engine Flush, Cleaner and Corrosion InhibitorIf the job you want to do is somehow related to marine engines, boats or anything close to both saltwater and freshwater environments, this corrosion inhibitor is the thing you need. This product dissolves salt without any problem leaving your work object clean and protected. CRC SX128 cleaner is absolutely necessary as a motor flush for marine engines, cooling systems, heat exchanges, etc.

The 128 Ounce Bottle makes it even a more attractive offer. A great advantage of this product is the fact that it is biodegradable and you can be sure that it will not harm in any way the surfaces you are using it on. The threat of future salt corrosion will be significantly reduced and the product will give you a nice protective sheen. You can use it not only as an engine flush but also on metal components such as fishing tackle, rods, reels, and others. The usage is incredibly easy. You just have to spray it on, let it soak and then rinse off. There is no need for scrubbing or getting irritated that you don’t know how to use the product. This cleaner is a must-have for any boat owner but even if you don’t pertain to this group of people you can always use this corrosion inhibitor for your automobile, motorcycle, bicycle, furniture and more!

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5. Gunk FEB1 Foamy Engine Brite Engine Cleaner

No more scrubbing, no more meaningless effort, no more sweat and most importantly no more dirt! This foamy engine cleaner removes dirt, grime, and grease perfectly. The foaming action quickly clings to vertical surfaces making the cleaning process so much easier and effective. The product is designed specifically for plastic covered engines, keeping all engine components safe and yourself happy. That means that the Gunk FEB1 foamy cleaner is suitable for plastic, under-hood rubber and also paint.

The GUNK company is one of the leading brands in engine degreasing which makes this product even more reliable. The usage of this degreaser is really easy. Just spray it on, wait for approximately 10 to 15 minutes then hose it off. That’s it, you are ready to go. Be careful, though, always follow the instructions of the manufacturer. This product is flammable so you one hundred percent have to rinse it off in order to take the risk of fire away. You could rinse with a pressure washer or simply a slow stream of water. The cool part is that you can use the cleaner on almost anything – cars, trucks, tractors, mowers, pretty much everything you can think about.

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  • 4.5 Customer Rating
  • Meguiar's D10801 Super Degreaser
  • PRICE $$$
  • Size : 1 Gallon
  • Weight : 3.31 pounds
  • Contains : Free rinsing formula
  • 4.2 Customer Rating
  • Zep ZU505128 Fast 505 Cleaner and Degreaser
  • PRICE $$$$$
  • Size : 1 Gal
  • Weight : 1 pounds
  • Contains : Professional strength formula
  • 4.7 Customer Rating
  • Marvel MM080R Air Tool Oil
  • PRICE $
  • Size : 4 fl oz.
  • Weight : 4 ounces
  • Contains : Prevents rust formation
  • 4.4 Customer Rating
  • CRC 05319 GDI IVD Intake Valve & Turbo Cleaner 
  • PRICE $$
  • Size : 11 oz
  • Weight : 15.5 ounces
  • Contains : Highest concentration PEA (Polyether Amine) detergency
  • 4.7 Customer Rating
  • S100 12005L Total Cycle Cleaner Bottle
  • PRICE $$$$
  • Size : 1.32 Gallon
  • Weight : 13.8 pounds
  • Contains : Corrosion inhibitors, and is biodegradable

6. Meguiar’s D10801 Super Degreaser

Meguiar's D10801 Super DegreaserAre you are looking for the holy grail of car detailing? Congratulations, you have found it! This product is so strong that even the toughest jobs won’t be able to stop it. It’s fast acting and residue-free performance are just two of the great qualities this cleaner possess. Say goodbye to grease and dirt and most importantly to the unsightly white residue stains that most products leave behind. The pleasant work environment is guaranteed due to the herbal fragrance this degreaser can offer.

It may not be the cheapest product on the market but it is without hesitation one of the best you are going to find. We recommend that you mix 3 parts water to one part degreaser but you can always see what works best for your own needs. The only thing we can say for sure is that this is a good investment because a gallon of this product can last for years to come. It is really easy to use this degreaser. Simply spray it on, wait a couple of minutes and then wipe off. You can clean everything from engines to upholstery and in between. Metal, plastic or leather, it won’t be a problem for the strong formula of this super degreaser will clean it all.

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7. Zep ZU505128 Fast 505 Cleaner and Degreaser

Zep ZU505128 Fast 505 Cleaner and DegreaserThis next product is once again a perfect choice for you if you are tired of scrubbing and not getting a result. Zep commercial Fast505 cleaner and degreaser penetrates extremely fast and removes soils, dirt, and grease immediately.

You can use it for a variety of things. You want to clean your stovetop and counters, well, here you go. Your kitchen is full of old baking dishes or you have some old trays that you just cannot clean the way you want? Your garage floor is in awful condition? Your vehicle needs some refreshing? This magical cleaner is the solution to all your problems. It is completely safe, though there are some things you need to consider. The formula of the Zep cleaner is a strong one that is why you should always keep children and pets out of the area where you are cleaning until everything is completely dry. As the product is so strong, it can get into your respiratory system and even give you dizziness, so be careful. After all, it is safe, but it still a chemical. The fast 505 industrial cleaner and degreaser is suitable for plastic, metal, and wood so you can clean everything from your vehicle to your kid’s playground equipment.

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8. Marvel MM080R Air Tool Oil

Marvel MM080R Air Tool Oil - 4 oz.It’s a Marvel Mystery Oil product, what else do we need to say?! This company’s lubricants, penetrating oils and additives will give you one of the greatest performance you could possibly desire. Your tools will be rust-free because this product will keep them safe. Not only that, but it will also dissolve sludge and gum that most of the time is the reason behind your tool’s encrust and waste. By doing all these things, this air tool oil offers you a maximum protection and lengthening of the life of your tools.

The product is easy to apply and it will not sludge up like other air tool oils tend to do. Your air tools will work at full capacity and your wallet will be as happy as you. This Marvel MM080R Air Tool Oil is a low viscosity oil that is Stoddard solvent and has two benzene compounds. So you can be one hundred percent sure that it will get tools unstuck and it will never gum up. Still, keep in mind that this is a chemical product so follow the instruction you are given in the manufacturer manual. We can simply say this product is an air tool’s life elixir and swear on our toolboxes.

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9. CRC 05319 GDI IVD Intake Valve & Turbo Cleaner

CRC 05319 GDI IVD Intake Valve & Turbo CleanerValve cleaning on almost any car is expensive and not so easy thing to do. Well, with this valve and turbo cleaner this statement is not reliable at all. This product not only restores horsepower and MPG but it also cleans the valve without damaging the turbo. It is suitable for GDI engines and turbo systems. This valve and turbo cleaner is extremely concentrated (150x more than fuel additives) so when using it we recommend you to be careful and follow every instruction you are given. For example, this product is designed for gasoline engines so don’t try your luck using it on diesel ones because it could cause a pre-ignition. One hour is all it takes for this cleaner to dissolve up to 46% of GDI Intake Valve deposits. A special, advanced cool technology is delivered directly to the backs of intake valves, not only improving the MPG but also reducing rough idle. Using the air intake system, the product is easily installed. There is one downside to this product that you should not let scare you. Since this is a spray can, you have to spray in intervals so you don’t flood the engine. Still, post-treatment, your engine will run smoothly and you would not want to use anything else.

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10. S100 12005L Total Cycle Cleaner Bottle

This product is developed especially for motorcycles. It will save you a lot of time and effort because it does not have to do anything with scrubbing. You can clean not only the motor but the entire motorcycle, and the whole process will last around 15 minutes. That means that you could do it even a couple of times a month. Everything is so much easier with a spray, isn’t it? The hard-to-reach cracks and crevices will no longer be a problem. With this spray-on, rinse-off cleaner you can have a clean and sparkling motorcycle in no time. We recommend that you use it while your motorcycle is cool. The best part is that it is safe for all cycle surfaces. You can use it on rubber, plastic, paint, alloy, chrome, well…you get the point! The S100 12005L Total Cycle Cleaner is biodegradable and contains corrosion inhibitors. It is also a non-acid, pH controlled product. We know that it is advertised as the perfect product for your motorcycle but you should know that you could use it for a variety of other things. The product is excellent for cleaning lawn and garden equipment, snowmobiles, automobile engines and more.

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Benefits of Using an Engine Degreaser

best engine degreasers

This is not a product which will do 100 different things and will be good all around the household. An engine degreaser has a very specific purpose and we should stay within its boundaries. This doesn’t mean that there are no benefits. On the contrary, more and more drivers and vehicle owners nowadays turn to the best products on the market.
In the past, people would attempt to create their own best homemade engine degreaser but now we live in a time where we can safely trust proven manufacturers out there. So here’s what benefits you get from having a clean engine:

  • Cleaner engine: the whole installation under the hood will simply look cleaner and will be significantly more visibly pleasing. Won’t you be embarrassed to lift the hood in front of friends or relatives so that all that dirt and build-up can be seen?
  • Longer engine life: this is pretty much the main goal of every engine degreaser. It’s not just aesthetics. We also want to drive our cars longer and having a clean engine will definitely increase our chances of doing exactly that
  • Smoother engine work: while this is mainly taken care of by some of the octane boosters we have also reviewed, an engine degreaser will help too. The overall sound of the motor should be smoother as the parts will be free of filth.

Engine Degreaser Buying Guide

engine degreaser reviewsWell, this is not a smartphone or a TV so that you have to think about a million specs. However, there might be some aspects to consider so here we will highlight them for you.

Features to Consider Before Buying an Engine Degreaser

  • Type
    There are 2 main types of engine degreasers available out there:

    1. Petrol- based: these products are mainly considered to be heavy duty engine degreasers because of their chemical composition. This means that they are effective and will rid you of many unwanted things on your engine. They are, however, pretty dangerous and you should always wear a mask and gloves when using them. Keep in mind that the excessive use of petrol-based engine degreasers might also damage the integrity of the engine.
    2. Water-based: here we are talking about a much gentler product. While it will get the job done, it is also easier to wash and rinse off. Some of these can also be used as kitchen degreasers although we can’t say that we recommend that.
  • Purpose
    Since we mentioned the kitchen, it is only fair if we moved to the next feature. Some degreasers can be used around your household while some are designated especially for your vehicle. Get informed on that matter before you buy anything. The ones that can clean a wider array of surfaces should be somewhat more expensive.
  • Surface
    This is a different feature than the one mentioned above because even if a degreaser is supposed to clean only engines, it might still be (or not be) a multi-surface one. What we mean is that some products are okay when used on plastic or paint.
    Others will not play well with your car paint so you might want to be careful when you do the spraying. Some people also apply the substance on their wheels and that’s fine. However, we recommend that you check out our best tire shine product reviews if you want to have flashy wheels.
  • Size of the Container
    We simply cannot overlook the economy aspect of engine degreasers. It is understood that you want to use the product for as long as possible and this is why investing in a larger flacon might be the way to go. On the other hand, you don’t want it lying around.
    For those with brand new cars, purchasing a smaller size can be the better idea as we do not expect them to have to degrease the engine a lot.

How to Use Your Engine Degreaser

The short version of this section is to basically tell you simply: “Aim and shoot”. But there is a little bit more to that as we cannot simply make a foamy mess under our hood. There are certain steps to bear in mind:

  • So the first thing to do is to look around the engine. There is no need to spray the areas where we see no build-up and filth. It is best if you first have the engine inspected for leaks as a degreaser can also battle oil residue.
    Once you know where cleaning is needed, start spraying profusely. Some areas are better off left dry. For instance, the insulating mat comes to mind. This is mostly because the mat will retain the odor and you probably do not want that.
    The key thing here is to not be hasty with rinsing the engine off. It is best if you let it stay like that for about 15-20 minutes. This will allow the substance to actually do its job and dissolve the dirt around the parts.
  • Next Is the rinsing part. This is pretty much self-explanatory because there’s nothing to it. Don’t worry, you will not damage the engine in any way with water. At least not in those amounts.
    Most engines are very well sealed and no water will get into sensitive and delicate areas. Even if it does, the moment the engine heats up, all the water will evaporate. In fact, this is how you can dry out the engine after washing it. There’s no need to wipe it off with towels. Such an ordeal is quite challenging. Simply start the engine, let it run for a few minutes and that’s it.
  • If you have a can of engine protector now’s the right time to use it. It will not only make the engine look shiny but will also add a layer of protection so that you will use the degreaser less frequently.

Will Car Paint be Damaged by an Engine Degreaser?

Knowing what to do if you accidentally put engine degreaser on your car paint is vital. It is not the end of the world. But if you are quick to wash it with fresh water, you should be alright. After the paint has been dried, inspect for any damage. If needed, use a stain remover. The final step is to apply wax. For that purpose, you might want to go through our guide to getting the best car paint sealants.

Best Engine Degreasers Comparison Chart

Schaeffer Manufacturing 266 Citrol Cleaner and Industrial Degreaser
$$12 oz.1.2 poundsCombination of organic citrus based solvents and a multi-component surfactant-emulsifier system
Chemical Guys CLD_201 Signature Series Orange Degreaser
$$$1 Gal9.1 poundsProfessional strength citrus-based formula
POR-15 40104 Cleaner Degreaser
$$1 quart2.4 poundsWater-based non-flammable degreaser
CRC SX128 Salt Terminator Engine Flush, Cleaner and Corrosion Inhibitor
$$$1 Gallon2 poundsBiodegradable Formula
Gunk FEB1 Foamy Engine Brite Engine Cleaner
$$17 Oz.1 poundsFoaming action
Meguiar's D10801 Super Degreaser
$$$1 Gallon3.31 poundsFree rinsing formula
Zep ZU505128 Fast 505 Cleaner and Degreaser
$$$$$1 Gal1 poundsProfessional strength formula
Marvel MM080R Air Tool Oil
$4 fl oz.4 ouncesPrevents rust formation
CRC 05319 GDI IVD Intake Valve & Turbo Cleaner
$$11 oz15.5 ouncesHighest concentration PEA (Polyether Amine) detergency
S100 12005L Total Cycle Cleaner Bottle
$$$$1.32 Gallon13.8 poundsCorrosion inhibitors, and is biodegradable

Wrap Up

Well, there it is – the road to having a perfectly clean engine goes through reading a simple guide. We are glad you made us part of your day and we sincerely hope to have helped you located the best engine degreaser out there.

If you think that a certain item needs to be added to our engine degreaser reviews, feel free to let us know. Don’t hesitate to comment on the article and give us suggestions. After all, we are here to improve and bring you better content by the day. Thanks for reading and as always – stay put!