10 Best Dog Clippers For Thick Coats, Professional Clippers 2017

Dogs have been considered to be man’s most suitable companion since time immemorial. Not only are they known for their loyalty, but they are also perfect for sharing invaluable experiences and memories. As a valuable friend or family member, these animals deserve utmost attention and care. And from my point of view, as an experienced professional groomer, dogs with thick undercoats are the ones that need extra care while trimming.

The fur of any dog is made up of some amount of keratin and dead cells (skin) and grows on the inner layer of a dog’s skin. This is because dogs rely on the fur for regulating their body temperature. Dogs with heavy fur develop several hairs in a single hair follicle on their skin, and they also carry extra oil glands than dogs with thin hair coating, as they generally have their roots in extremely cold regions.

It can get tough for you to manage your dog’s massive fur, especially during the summer months when trimming is the only way to keep the poor fellow cool and comfortable. However, using the right dog clippers for your hairy beast can make things easier for both of you. Take a look at the best clippers for dogs with thick coats, which are, in my opinion as a professionally experienced groomer, effective in providing the most comfortable trimming experience to your heavily furry friend.

List of the Best Dog Clippers for Thick Fur

If you are looking for a cheap dog clipper under $50, only for home use then please read our guide on best cheap dog clippers under $50.



 Andis Super AGR+ Rechargeable Detachable Blade Clipper, Professional Dog Grooming


Andis Super AGR+ Rechargeable Detachable Blade Clipper, Professional Dog GroomingOverview: This ultra-quiet, lightweight and powerful dog clipper is ideal for dogs with massive fur. The Andis Super AGR+ Rechargeable Detachable Blade Clipper can be used for daily grooming purpose. The Sensa-Charge featuring battery charger can charge the battery fully within an hour, without causing the battery to overcharge. Moreover, the Refresh button can be used for reconditioning and revitalizing the battery overnight. The most interesting feature of this clipper is that it is detachable and cordless, making it a perfect grooming device for dogs who cannot stay still at the time of trimming.

Why at no #1: This clipper has been designed to ensure long usage while running efficiently to cut through the dense hair of your dog. It comes with 4×4 blade drive to offer that extra torque. This product offers as many as 3800 SPM for a great trimming experience. It also comes with a high-capacity battery pack so that it can operate continuously for an hour. The following features make this professional clipper the perfect grooming device for your heavily- furred pet.

It is lightweight yet powerful with an ergonomic design, all of which are necessary for a good dog clipper. The housing is also break resistant which makes it durable even if it hits the ground.

It is completely maintenance-free, so you don’t have to worry about greasing or oiling its internal parts. The blades are detachable so you can easily clean or change them when required.

This Andis Super AGR + Rechargeable Detachable Blade Clipper features ShowEdge, CeramicEdge, and UltraEdge blades- all of which are high-quality blades that can cut through thick hair coat smoothly.

This efficient clipper also comes with a high quality rotating motor, which is strong enough to find its way across dense hair and offers even trimming for most dog breeds.

The battery pack is removable, and it can be easily recharged within an hour.

The entire kit features break resistant, ergonomic handpiece, a carrying case, battery pack, a charging stand, # 10 CeramicEdge blade, user manual and clipper oil.


  • It can function as a corded dog clipper when the ARGC cord block is attached to it.
  • Quick and effective trimming.
  • Offers strong grip at the time of grooming.
  • It is remarkably noiseless.
  • Maintenance is easy without any use of grease or oil.


  • You may need to charge more often for continuous grooming one after another.
  • The replaced batteries may not work as powerfully as the original ones.

Price on Amazon: Check on Amazon



Wahl Professional Animal KM10 2 Speed Brushless Motor Clipper Kit

Wahl Professional Animal KM10 2 Speed Brushless Motor Clipper KitOverview: This power-packed clipper is well-known for its high volume performance. Another great option for your excessively hairy friend, the Wahl Professional Animal KM10 2 Speed Brushless Motor Clipper Kit is fully capable of handling full-body grooming as well as high usage. This clipper has been exclusively designed to provide dog owners along with professional groomers an optimal cutting experience using reduced heat technology and power transfer.

Why at no #2: The Wahl KM10 dog clipper can last for a continuous use of 10,000 hours! The 2-speed model incorporated in this clipper run at 3000 rotations per minute and 3700 rotations per minute, thereby ensuring that you don’t have to spend a lot of time in grooming your loving pet. It is ergonomically designed with helpful speed-control features for a uniform trimming experience, even for the extremely hairy dogs. Here are some reasons why you should opt for this clipper to groom your densely-haired pet.

It has been specifically crafted to provide a power-packed performance by combining power and comfort. It even includes Constant Speed Control that automatically provides extra power for clipping through thick and matted hair, ensuring quick grooming in tough situations.

To lower the wrist fatigue, this Wahl KM10 clipper offers superior control and comfort with its lightweight, low-vibration, accurately balanced, ergonomic design. You can use it for an entire day without causing it to warm up.

It comes with 2 different speeds- 3000 SPM and 3700 SPM- both of which can efficiently cut through massive fur, making it perfect for complete shaving experience. The brushless motor technology provides high torque and power that makes its performance last for up to 10,000 hours!

The blade is of superior quality and they don’t bog down, offering maximum torque with the help of its Constant Speed Control feature, even in those tough areas. This helps the clipper run smoothly through even the thickest of fur. Both you and your pet will enjoy the grooming process using this device.

The kit includes a size 10 blade, instructions, and appliance oil. While the clipper itself is manufactured in Hungary, the blade is the USA made.



  • The 2-speed motor provides high SPM.
  • It is remarkably noiseless.
  • Comes with ergonomic design.
  • Blades can be easily detached for cleaning


  • Some users reported the plug is little faulty, but the piece we reviewed was perfect.
  • Wahl calling it a brushless motor, but still sometimes hair gets stuck.

Price on Amazon: $160.15



Oster A6 Heavy Duty 3 Speed Clippers for Dogs, Light Weight Dog Grooming Clipper

Oster A6 Heavy Duty 3 Speed Clippers for Dogs, Light Weight Dog Grooming ClipperOverview: Often, pet owners refer to pet grooming as a thankless task, especially when your pet gets easily scared because of the noise and heat produced by the dog clipper and it takes a long time to get the desired result. But that is not the case with the Oster A6 Heavy Duty 3 Speed Clipper.

It caters to the grooming requirement of massively furry dogs in a fast and effective way, without producing much noise or heat. It has been exclusively engineered to provide the best possible comfort to your thickly furry friend at the time of trimming. This is one option that you should seriously consider for your pet’s uniform fur trimming.

Why at #3: It is a7.5 volt clipper that performs at a faster and lighter rate than most other clippers because of it’s time-saving and one-handed design features. It is also very quiet as it comes with vibrator isolators for absorb noise.

Additionally, this clipper features 3-speed settings and 12 ft cord, along with a faceplate to keep the hair out of the device. The motor in this clipper is highly powerful and comes with 3 varying speed settings at 3100 SPM, 3600 SPM, and 4400 SPM. This ensures that this Oster A6 remains cool yet effectively functional for trimming thin as well as thick fur coats.

The blades are detachable and can be easily cleaned and maintained, or even replaced with new ones. This clipper features Cryogen Size 10 blade that is very sharp and extremely durable.

This professional clipper is made using zinc alloy technology that ensures high durability and strength of the device. This technology also makes the clipper comfortable and lightweight, making it easy for you to hold this clipper with a good grip. The cord is also conveniently placed with a pigtail extension cable for a single outlet spot. This makes the power cord a space-saving extension.


  • It features 3 varying speeds for cutting through coarse and matted hair.
  • The motor is impressively strong.
  • It is durable, comfortable and lightweight.
  • The high-quality Cryogen blades are detachable.
  • It runs quietly and is vibration-free.
  • It remains cool even after being used for long time duration.


  • It needs an outlet for its power source.
  • The rubber grip might tend to peel off after being used for long time duration.

Price on Amazon: Check on Amazon



Andis Power Groom+ 5-Speed Detachable Blade Clipper, Professional Animal Grooming

Andis Power Groom+ 5-Speed Detachable Blade Clipper, Professional Animal Grooming

Overview: This Andis AGRV Power Groom + 5 Speed Detachable Blade Clipper gets its recommendations from top notch dog groomers and personal pet owners. In fact, pets other than dogs and livestock can be groomed using this clipper. Plus, you have the option of using it both as a cordless and corded clipper, especially if your dog needs thorough grooming for its heavy furs. Some of the aspects that make this clipper a great device for your furry friend are listed below.

Why at #4: It comes with a size 10 UltraEdge blade that is long lasting and offers a dependable grooming experience. The exquisite hardening process ensures that the blade stays sharp for a very long time. The special chrome finishing prevents corrosion and keeps your blade sharp and functioning for years to come.

This clipper also features 5 different speeds that prove beneficial in cutting through the various parts of your dog’s body. While the lower speed can be used for quiet and added control over the device when used on sensitive parts such as the pet’s face, higher speed can be used for getting larger areas trimmed faster and more efficiently.

This is a heavy duty clipper that uses a high quality rotating motor for powerful cuts along dense hair coat. It offers consistent and uniform cutting for the majority of dog breeds. It remains cool and does not warm up like those clippers with the magnetic motor design.

Another beneficial feature of this clipper is its 360-degree swivel cord. This prevents its power cord from becoming tangled up while in use, especially when you need to reach those areas that require access to certain angles.

All in all, whether you use this clipper with the swivel cord or without the cord altogether, you can provide an even, consistent trimming to your dog’s fur.


  • It comes with Size 10 detachable blade.
  • Remains cool while being used.
  • It is remarkably noiseless.
  • It features 5 different settings for speed between 2500 and 5000 SPM.
  • Can be optionally used in the cordless for.
  • Works effectively on a matted and heavy fur coat.
  • The housing is break resistant.
  • It remembers the last speed on which it was used.
  • AGR use is optional


  • Some users found that it gets hot after being used over 6/7 hours.
  • The power cord might pose problems while switching the clipper on or off.
  • Blade guards and additional blades need to be purchased separately

Price on Amazon: $172.95



Andis UltraEdge AGC2 2-Speed Professional Pet, Dog & Animal Detachable Blade Clipper

Andis UltraEdge AGC2 2-Speed Professional Pet, Dog & Animal Detachable Blade ClipperOverview: When it comes to giving the best to your pet, there is no chance of settling for anything less than the best. For those of you who demand the best quality in dog clippers for their thickly coated pets, the Andis UltraEdge AGC2 2-Speed Professional Pet Blade Clipper is worth a try. This dog clipper has gained popularity because of its amazing features and an incredible appearance.

The clipper is dark maroon in color that immediately makes it a favorite. Moreover, it comes with a detachable blade that gives you the option to change the blade when it loses its edge. The blade can also be easily washed, making it convenient for you to use this blade without putting in much effort for maintenance. Read on to find out why you should consider investing in this Andis Clipper for your densely-furry dog.

Why at #5: The 2-speed motor adds a power punch to the clipper, making it run for up to 4400 SPM, which makes the trimming process faster and smoother. The Andis AG Shape is well-retained in the anti-slip housing. The 4X4 blade drive adds 25% power and torque to the blade to easily cut through the thick or matted fur. For simple and easy maintenance, the unit is also equipped with removable blade drive cap.

The motor is impressively quiet and does not create any harsh noise, which may stress your dog. The clipper’s build is sturdy and highly durable. It is also shatter-proof, and the clipper can fit firmly in your hands. The housing is durable so it prevents your pet from being attacked by any hazardous chemicals. The 14’ cord ensures that you can easily move this clipper around without tripping or facing any danger.

It also effectively saves electricity. This clipper supports the lock switch feature that prevents this unit from shutting down accidentally. This keeps you from wasting electricity. The components of this unit are made from superior quality materials that ensure their longevity and keep you from wasting time or money on extra maintenance. You don’t even need to grease or oil the parts of this clipper. Also, the size 10 detachable blade is kept secure using the locking blade hinge feature of this clipper.


  • Good build quality.
  • It is ideal for dogs with a thick fur coat.
  • Extremely user-friendly.
  • Remarkably noiseless.
  • Sturdy and durable.
  • Affordable price. You get more than what you pay for.
  • It is shatter-proof.


  • It comes with only 1 blade-size.
  • The powerful motor can make it appear heavy.

Price on Amazon: $159.99



Oster Professional Turbo A5 2-Speed Heavy Duty Detachable Blade Animal Clipper

Oster Classic A5 Turbo 2-Speed Professional Animal ClipperOverview: This Oster Professional Turbo A5 2-Speed Heavy Duty Detachable Blade Animal Clipper has gained popularity for the ultimate heavy duty performance it delivers. This A5 2-speed professional clipper is the advanced form of the A5 1-speed clipper. The following features and aspects of this dog clipper make it well-suited for grooming dogs with concentrated hair growth.

Why at #6: It features a universal rotary 2-speed motor which enables the device to gain a speed of 3000-4000 SPM on the lower and higher ends. The blades that run on this speed can efficiently groom massively-furry dogs.

Moreover, the clipper comes equipped with a size-10 blade that makes it ideal for use on the face, ears, stomach, tail, and feet of almost all dog breeds, even those with heavy furs. This professional clipper comes with a wide blade that can sweep faster and more effectively.

The airflow is impressive and the device operates without making noise at the time of trimming. It is sturdy and cannot be broken easily, despite being used on matted or thick hair coat, offering 4000 strokes in 1 minute. The blade system is detachable to offer extra versatility to the clipper’s functions.

This dog clipper has been known to provide smooth and comfortable clipper experience to all dog breeds. The grease and oil application is also easy so you can ensure proper functioning of this clipper for an extended time period. Both professional groomers and personal pet owners can use this dog clipper for grooming their furry pets.

The prized feature of this Oster professional clipper is that it can be extremely quiet. Though a small amount of sound may be produced while using this clipper, on the whole, your dog will not fret or feel uneasy when you use this powerful clipper to groom your dog.

The blade can be cleaned easily and is coated with an anti-microbial feature to prevent any infection.


  • It comes with detachable blades in different sizes that can cut through even the thickest of hair.
  • Comes with a powerful and efficient 2-speed motor.
  • Remarkably noiseless
  • Easy and simple to use.
  • Highly durable.
  • Offers smooth and comfortable trimming.


  • This clipper might be a little heavy for some users.
  • Proper maintenance requires applying grease and oil, which can be a tedious task to some users.

Price on Amazon: $112.57



Wahl Arco SE professional cordless pet clipper

Wahl ARCO Cordless Professional Dog Clipper Kit ChampagneOverview: Technology has started to upgrade constantly. Be that as it may, the clipper companies are also putting up. At this point the best dog clippers for thick coats are wireless. Long gone are the days of carrying your wire everywhere around the house.

In conclusion, you can use your clippers anywhere. The Wahl Arco SE professional cordless pet clipper is perfect for someone who wants a powerful cordless dog shaver for thick hair. These clippers for dogs with thick hair is a very powerful one. Most of you may wonder about the charge. Well strangely enough for the huge power it produces it can last a lot on a single charge. So don’t worry about them turning off in your grooming session.

No clipper can be the best dog clippers for thick coats unless it is very powerful. Fortunately, this clipper cuts at at5500 strokes per minute which are more than any professional dog clippers.Despite being so powerful they stay fairly calm. The blades are really sharp and detachable. It also comes in a set of many other accessories. Such as combs, cleaning brush, oil, and instructions.

Why at #7:

  • The slim and lightweight design fits comfortably in your hand while reducing wrist fatigue
  • 80 minute run time per battery
  • 75 minute charge time per battery giving you continuous cordless operation
  • ‘5 in 1’ blade technology outperforms all other industry blades
  • Easy to clean clipper with a no maintenance motor for hassle free grooming


  • Cordless clipper.
  • Cuts 5500 strokes per minute.
  • Detachable blade.
  • Great set of clippers for someone who has never done any grooming before.
  • Professionally recommended.
  • Easy to use.
  • Doesn’t get hot.


  • The body may break if fall harder
  • There is only one tab that keeps the blade head on the Clippers.
  • May get a bit hot if used for a long time

Price on Amazon: $116.09



Oster Power Max 2-Speed Clippers with CryogenX Antimicrobial Blade

Oster 78004-011 Power Max 2-Speed ClippersOverview: The brand Oster is a great one when it comes to the best dog clippers for thick coats. The Oster 78004-011 power Max 2 is a great clipper with great speed and power. These are excellent clippers, they can clip for long sessions without overheating the motor, they don’t slow down, stall and clatter when you overfeed them like the cheaper alternatives.

To be honest clipping animals is not easy. But using this one to clip fur is a whole different thing. The clipper has a powerful prominent magnetic rotary motor. It has a 2-speed motor. The clipper produces 3,700 strokes per minute on low speed and 4,200 strokes per minute on high speed. The blades are compatible with all Oster CryogenX detachable blades. Even after the motor is so powerful the clipper is very calm and doesn’t make a lot of noise.

One unique feature is the rubberized grip on it which makes it easy and comfortable to hold. The clipper includes a with standard Oster #10 blade, blade guard, blade oil, grease, cleaning brush, 2 extra drive tips, and instructions.

Why at #8:

  • Versatile 2-speed clippers for pet grooming
  • Powerful magnetic rotary motor turns up to 4200 strokes per minute
  • CryogenX blade with AgION antimicrobial coating reduces bacteria
  • Detachable blade system for quick, easy changing
  • 20 percent lighter than Oster A5 clippers


  • Insanely fast motor.
  • Very quite motor.
  • It doesn’t get hot.
  • Multiple speed allows different options.
  • The number 10 that comes with it is NOT for full body. It clips the hair far too short.


  • The plastic driver for the blades have to be replaced frequently or the clippers get very noisy.
  • You have to clean hair frequently to ensure continuous trimming, but for home use not a problem.

Price on Amazon: $89.62



Wahl Pro-Series Dog / Cat Grooming Kit, Rechargeable, Cord or Cordless Operation

Wahl Home Pet Pro-series Complete Dog Clipper KitOverview:  If you are just getting into the dog grooming world then the Wahl Pro Series Dog Cat Grooming Kit will be the perfect fit for you. This clipper kit is an overall allrounder. The kit has everything you need starting from combs, cleaning brushes, scissors, and more. It truly opens a wide array of opportunities for grooming your dog. The most noticeable feature of this clipper that excites me the most is the price. With the price that it comes compared to the quality it gives. It truly is a sheer winner.The cordless feature is also a superb addition and adds a nice flare to the kit. It also makes it very efficient and convenient to use. The motor is very powerful and speedy. Unfortunately, we were not able to identify any cutting speed. But I can assure you that it cuts just like any other professional clipper. You will also be getting an instructional DVD with it which is great.

The cordless feature is also a superb addition and adds a nice flare to the kit. It also makes it very efficient and convenient to use. The motor is very powerful and speedy. Unfortunately, we were not able to identify any cutting speed. But I can assure you that it cuts just like any other professional clipper. You will also be getting an instructional DVD with it which is great.

Why at #9:

The deep blue design of the clipper is very attractive and appealing. It also functions really well. One of my friends used it on his dog. The dog had horrifically matted hair and it didn’t work out pretty well for him. On the other hand, it works smoothly if your dog has a thick fur coat. The wireless design also provides mobility and flexibility.

A benefit that most expensive clippers fail to deliver is heat reduction. Most of them start getting hot after a few minutes of use. However, with the Wahl Pro Series Dog Cat Grooming Kit, the case is totally different. It stays cool throughout and only heats up if it turned on for more than an hour. The reason why they stay cool is that they aren’t operating at a really high speed like other professional clippers that you would pay a fortune for.

  • Rechargeable Convenient cord/cordless operation for full non-stop clipping power
  • With professional features, you have come to expect from Wahl grooming tools
  • Self-sharpening, high-carbon steel blades; precision ground to stay sharp longer
  • Made in the USA from domestic and imported parts
  • Includes a super easy, step-by-step “how to” DVD
  • Made for use in USA electrical outlets only. Not for international use.
  • 5 years limited warranty


  • Good build quality.
  • Doesn’t make a lot of noise.
  • Stays cool.
  • The blades are comfortable to the skin of the dogs.
  • User-friendly and perfect for home use.
  • Affordable price. You get more than what you pay for.
  • Easy to clean.


  • Need extra care for battery.
  • The accessories that came with the grooming set requires often.
  • For the thick coat, you have to ensure the battery power is full.
  • Perfect for home use, not for continuous professional trimming.

Price on Amazon: $54.85


Wahl Dog/Pet Home Grooming Lithium Ion Pro-Series Rechargeable Clipper Kit

Wahl Home Pet Lithium Ion Pro Series Pet ClipperOverview:  Trimming and shaving off your dog’s thick hair is a hassle full job. But some new trimmers in the market are constantly changing it. It is making it easier than ever. The Wahl dog/pet home grooming lithium ion pro-series is one of such. With wireless mobility.

Techy design and a ton of features this one is undoubtedly a hard one to beat. Powered by lithium ion technology, the clipper outperforms standard Wahl rechargeable clippers by providing up to two times the run time, clocking in at one hour and forty minutes on a full charge. This eliminates the need for frequent recharging and provides uncompromised cutting while clipping your dog.

The kit itself comes with two set of clippers. The blades are firm and sharp and there are is also oil included to keep the blades smoothly running. Once you start grooming with the Wahl Dog/Pet Home Grooming Lithium Ion Pro-Series you will feel comfortable like never before.

It is really smooth and perfect. The battery on the clipper is also pretty good and lasts a pretty long time. It also has a blade depth adjustment on the left side which is a very handy feature. The shape of the clipper is pretty cool and allows a good grip.

The grooming kit altogether is a great deal. Focusing on the best dog clippers for heavy coats this one is a clear heavyweight. It pretty much has all the features of the best dog clippers for heavy coats.

Why at #10:

  • Durable, long lasting rechargeable clipper with 2 hours run time and a quick charge for grooming anywhere
  • Easy to use, quiet clipper for home grooming.
  • Made in the USA from domestic and imported parts
  • Precision, self-sharpening, snag free, blades
  • 5 year limited warranty
  • Made for use in the USA electrical outlets only. Not for international use.


  • Cordless
  • Sleek design
  • Includes a lot of attachments
  • Premium build
  • Easy to use.


  • The attachments make the cutting slower.
  • The motor is not too silent as like as professional grade clippers.
  • Needs oiling if you don’t use for a long time.

Price on Amazon: $59.97


How To Find A Dog Clipper For Trimming Heavy Hair Coat

First of all, it is important for you to know which dog clipper would work best for your thick-haired companion. Here are some aspects that you need to consider while purchasing a dog clipper to trim the unmanageable hair covering your dog.

Strokes Per Minute: Higher SPM- Strokes Per Minute or SPM is a crucial factor that decides how long it can take trim the hair. For a dog with excessive hair growth, a clipper with a stroke range from 3000- 4000 SPM is recommended as it can smooth cut through such heaving hair coat. Selecting Clippers with less stroke range than this range would only result in uncomfortable and uneven shearing. Don’t even think about scissors or Shearer- the results might be dangerous for you or your beloved pet.

Weight and Grip: Proper Balance With Effective Grip And Light Weight- You should avoid using any clipper that is heavy because it might cause your wrist to feel tired. Again, a clipper whose grip is not strong will tend to slip out of your hand every now and then. All these can potentially cause accidents that will harm your pet or your hand. The best clipper should be lightweight, with a steady balance and strong grip that will lower the strain on your wrist, and will shear in a safe but effective way.

Multiple Speed: High-Speed Spectrum- This is another necessary feature to look for in a dog clipper that trims dense coat of hair. Higher the speed, quicker will the shearing process end. Your dog will not have to wait for a long time to be freed from his heavy furring. Select a clipper that can switch easily between low and high-speed spectrums, as it will ensure better trimming within a short time span.

Silent Motor: Motor Should Be Noise-Free- In case your pet happens to fall under the nervous category with a tendency to get startled easily, then choosing a dog clipper with quiet motor is a must. Noisy Clippers can make these loving creatures uncomfortable, which in turn, makes the clipping process very difficult. A proper dog clipper will make a very little sound while effectively trimming heavy coat.

Attachment Combs: Comb For Even Trimming- To trim the thickened coat of your dog evenly, you will need a proper comb. Combs are available in different materials and sizes, but you should look for the one that will be best-suited for your dog. It is also important that your clipper’s blade and head allow the guide (comb) to perfectly yet safely trim your dog’s hair.

So, now that you are aware of all the necessary things to search in your dog clipper, let us take a look at the best dog clippers for thick coats for you to make your pick.

Final Thoughts

As clear from above, you need to take into consideration certain important features when buying a dog clipper for your heavily- furred companion. However, you should also note that Oster, Andis, and Wahl are among the best dog clipper brands for trimming hair, especially for those dogs that come with dense hair. Hopefully, by now you have been able to make up your mind about which of these best clippers for dogs with thick coats you would want for your beloved pet. Finally, don’t forget to maintain the clipper using the recommended oil so that it continues to function effectively for a long time.