Top 5 Best Essential Oil Diffusers for Car (2020 Reviews) – Buyer’s Guide

If you are in a hurry and just want to find out what the best essential oil diffuser for car is, then we recommend the InnoGear USB Aromatherapy Essential Oil Diffuser as the best one.


You may be spending most of your day in your car, whether it is due to the job or anything else. Nonetheless, you would probably want to have a pleasant atmosphere in your car, which may have helped you endure hour-long drives easier.

A car essential oil diffuser may be the right tool to achieve this with.

There are plenty of oil diffusers out there, so we went out there and picked 5 units that we think are the best car essential oil diffusers on the market. And we are now ready to share our opinion with you.

In this article, we’re going to review the following essential oil diffuser for car :


Essential Oil Diffusers for the Car: A Buyer’s Guide

Vehicles, unfortunately, tend to trap nasty smells thanks to everything that goes on in them. Let’s face it; kids in wet swimsuits and dogs that were recently playing in the mud tend to wreak havoc on the odor that your car gives off but there are things that you can do about it. Diffusers are great devices that are designed to spread around the nice aroma developed by the essential oils inside and they now make these products specifically for automobiles.

Reasons to Buy a Diffuser for Your Car

Car diffusers come in various types and designs but if you’re going to buy one, it is good to determine why you want one in the first place. There are numerous reasons to purchase a car diffuser including because you want to be more alert as you drive, because you want to eliminate germs, because of the nasty smells already present in the car, and because you want to get into a better frame of mind. All of these are good reasons!

Almost any type of essential oil can go into a car diffuser so whatever goal you have in mind, you can easily achieve great results once you pick the right oils. However, there are some precautions that you should take when choosing these oils and all it takes is a little common sense.

Essential Oils to Avoid When Driving

Being relaxed is a good thing but you don’t want to be too relaxed while you’re driving or it can cause an accident. Essential oils that should be avoided include clary sage, sandalwood, sweet marjoram, and chamomile. Even lavender should be used sparingly because it too helps you relax. Instead, you can use oils such as lemon, spearmint, peppermint, rosemary, and any and all types of citrus oils.

Basically, any oils that are meant to make you drowsy are unfit for use inside of a vehicle. Instead, choose essential oils that are meant to increase energy and improve your state of mind because these are the ones that work best while you’re driving.

Remember That You’re in an Enclosed Space

When purchasing diffusers and oils for your vehicle, you have to keep in mind that this is not a room-sized area; it is a much smaller space. Therefore, always choose a diffuser specifically made for a vehicle and always use only a small amount of essential oil, at least to start out with. Don’t just run out and purchase a small diffuser made for homes and use your USB port to plug it in because that will be too much scent for a car.

In addition, you should always choose a car diffuser that is easy to turn on and off because you may feel overpowered by the smell after a while and it can affect how you drive. Ideally, you should never drive with your diffuser on for more than 30 minutes at a time without taking a short break from the scents.

Other Things to Consider

When purchasing a diffuser for your vehicle, you should know that there are several types of diffusers to choose from and they all have their pros and cons. The three basic types of car diffusers are:

  • Passive diffusers, which usually contain pads made out of felt or other absorbent material that holds the drops of oil
  • Misters, which spew out a light mist along with the scent
  • Ultrasonic diffusers, which look similar to the diffusers used in the home but are much smaller in size

With modern vehicles, car diffusers are usually operated via a USB port but you can still find diffusers that will fit into the cigarette lighter if you have an older vehicle. Passive diffusers are usually attached to the air vent and operate that way so if you don’t want to be bothered by spewing mist, this is the way to go.


Buying a diffuser for your vehicle is neither a difficult nor an expensive endeavor and choosing the right one will make you even more excited about taking your next road trip or errand. Since car diffusers come in so many different designs, it is also easy for you to find one that complements the inside of your vehicle. The different essential oils available make it convenient to achieve the results you want most.

If you find it too complicated to use an essential oil diffuser in your car, sachet crafts bags are a great alternative.

Best Essential Oil Diffusers For Car Reviews

Ddodocool Car Diffuser

Operation principle

An ultrasonic oil diffuser, dodocool uses ultrasonic vibrations to break the essential oil down into fine particles. The particles are then mixed with steam and dispersed into the air, providing both a humidifying and aromatizing effect.


  • Add water below the max line.
  • Add 2-3 drops of water-soluble essential oil.
  • Connect the diffuser to your car’s cigarette lighter port.
  • Press the mist button to start the operation.

Dodocool car diffuser is a nice option if you wish to enjoy a pleasant fragrance in your car hours long. Thanks to its 70ml high-capacity water tank, this diffuser is capable of providing up to 3-5 hours of continuous mist.

In addition, this oil diffuser has 7 inbuilt LED colors, which may allow you to further enhance the ambiance in your car.

While this essential oil diffuser is bulkier than the other models on the list, it still is compact enough to be conveniently used in a vehicle. Namely, you should be able to put it into a cup holder just fine. The size shouldn’t interfere with shifting as well.


  • Both humidifiers and aromatizes.
  • Large 70ml water reservoir.
  • Inbuilt 7 LED colors.


  • Refilling can be messy.
  • A bit bulky.

>> Check Price on Amazon <<


InnoGear USB Aromatherapy Essential Oil Diffuser

Operation principle

InnoGear USB essential oil diffuser is yet another ultrasonic diffuser on the list. It operates in the same way as the two previous diffusers: that is, it breaks down the oil into fine particles, mixes it with steam, and disperses in the environment.


  • Fill the device with water.
  • Add a couple drops of water-soluble essential oil.
  • Plug the diffuser into a USB port. Alternatively, use a 5V 1A car adapter.
  • Power the diffuser on and choose the desired mist mode.


InnoGear is very similar to the dodocool diffuser we reviewed in the very beginning, but there are some important differences that set them far apart.

One similar thing in the two diffusers is water capacity. Both have a 70ml water reservoir, so they both should have a very similar runtime. Likewise, the sizes of the two diffusers are very similar.

And yeah, both diffusers have 7 inbuilt LED light colors. But the similarities end here.

The first difference in this oil diffuser is that it has 2 mist modes – continuous and intermittent. The latter mode allows the diffuser to be a bit more sparing when diffusing oil.

The second difference is that this oil diffuser is powered via USB. What this means is that you could use the InnoGear diffuser not only in your car but also at home.

The not so good thing about this is that you won’t be able to use this diffuser in your car out of the box, unless you have a USB port in the car. Otherwise, you would need to get a cigarette lighter adapter.

Nonetheless, given that this diffuser’s use isn’t limited to just your car, we think that it is a great buy.


  • Powered by USB.
  • Large 70ml water reservoir.
  • Aromatizes and humidifies.
  • 2 mist intensity modes.
  • 7 LED color options.


  • No cigarette lighter adapter included.
  • Could be messy when refilling.

>> Check Price on Amazon <<


AromaAllure Essential Oil Diffuser

Operation principle

AromaAllure oil diffuser belongs to the class of so-called evaporative oil diffusers. The main components in this diffuser are the fan and the filter. The oil is dripped onto the filter and then blown out into the environment by the fan.

No heat or water is used in AromaAllure diffuser.


  • Add a few drops of essential oil on the fragrance pad.
  • Place the pad into the diffuser.
  • If you will be powering the device via USB, plug it into a USB port. Use an AAA battery otherwise.
  • Power up the diffuser.


When it comes to quick fragrance delivery, probably no diffuser on the list can compare with AromaAllure’s solution. As we already said, this essential oil diffuser employs a fan to assist with the diffusion, which is the thing that allows it to deliver fragrance a bit quicker.

And what’s even better is that this diffuser doesn’t require water for operation.

On the other hand, the fan is going to obviously make noise, and if you get easily distracted while you drive, you may dislike this oil diffuser.

What is also good in this diffuser is that it can run either via a USB port or an AAA battery, whichever is more convenient for you at the moment. And this also means that you can use this diffuser at your home and anywhere else outside the car.

The quick oil dispersion has a downside as well: this thing is only capable of running up to 30 minutes. This is why we think that this diffuser is more suitable for situations when you need a quick stream of freshness in your car.


  • Doesn’t run on water.
  • Assists diffusion with a fan.
  • Battery- or USB-powered.
  • Employs a fan to spread the fragrance.


  • The fan’s sound may be annoying to you.
  • Runs for only 30 minutes.
  • Doesn’t come with a cigarette lighter adapter.

>> Check Price on Amazon <<


RoyAroma 30mm Car Aromatherapy Essential Oil Diffuser

Operation principle

RoyArome oil diffuser basically is a locket with a fragrance pad in it. The essential oil is dripped onto the fragrance pad. Then, the oil’s elements are spread solely via diffusion without the use of fans, water, or heat.

To increase the efficacy of this diffuser, you could clip it onto an air vent in your vehicle. The airflow is going to greatly improve the diffusion, basically turning this device into a fan-assisted diffuser.


  • Apply a few drops of essential oil onto the fragrance pad.
  • Put the fragrance pad into the locket.
  • Clip the locket anywhere in your car, preferably to an air conditioning vent.


Thanks to its simple design, RoyAroma oil diffuser has plenty of advantages.

First of all, it requires absolutely no power for operation, meaning that you could use it basically anywhere, be it your car, home, office, and even a camping tent if. Likewise, this diffuser needs no water, which basically makes it mess-free.

Secondly, this essential oil diffuser produces no sound, so it is a good option for people who get easily distracted while driving.

What we also like in this set is that it comes with 2 diffuser lockers and 12 fragrance pads. This means that you could aromatize air in two locations, as well as quickly swap fragrances without washing the pads.

With all that being said, this essential oil diffuser isn’t going to be too quick when diffusing oils. With no internal mechanisms that would assist it, it basically relies on plain diffusion to spread the fragrance. And this can take quite some time.

But fortunately, there are a couple of workarounds about this issue, like clipping the diffuser to a car vent or placing it near a heat source.


  • Very compact.
  • Completely quiet.
  • Requires no water or electric power.
  • 2 lockets and 12 fragrance pads included.


  • Doesn’t spread the oil too efficiently.

>> Check Price on Amazon <<


Ufanore Waterless & Car Essential Oil Diffuser

Operation principle

Ufanore Waterless & Car Essential Oil Diffuser appears to rely on heat to diffuse the oil. This method of diffusing is similar to fan diffusing, with the difference being that heat diffusers use heat instead of fans and thus don’t produce any sound.

However, the heat produced by this diffuser may alter the composition of the essential oil, so you would need to be careful when choosing oil.


  • Twist the top and open it. Take off the base.
  • Take the tank out of the diffuser.
  • Drop about 4-5 drops of essential oil in the tank.
  • Place the tank in its place.
  • Tighten the upper cover.
  • Power the diffuser on.


Like RoyArome diffuser, Ufanore Waterless & Car Essential Oil Diffuser also operates noiselessly. However, as we mentioned above, the operation principle of this device is a bit different.

This diffuser employs heat, and to produce that heat, it requires power. And it gets power either via USB. So while this diffuser can be used pretty much anywhere, you will have to think about providing it with power.

Still, this diffuser doesn’t require any water, meaning that you won’t have to deal with any water-associated issues.

Another nice thing about this diffuser is the up to 100-hour runtime. While this diffuser won’t be providing you with an immediate flow of fragrance, it should be capable of maintaining a pleasant environment for a long time.

And lastly, this diffuser is quite compact, so it won’t be taking too much room in your car.


  • Powered by USB.
  •  Auto Shut-off
  • Waterless operation.
  • Runs noiseless.


  • Doesn’t come with a cigarette lighter adapter.

>> Check Price on Amazon <<



That’s it for our reviews! Now would be the right time for you to make the final choice.

Did you like any of the reviewed essential oil diffusers? If yes, then you should probably get it. Of course, if you are sure that it is going to work out for you.

Otherwise, if you aren’t quite sure, let us share with you our personal top 2. Maybe it helps you with making your decision.

We think that among the diffusers reviewed, InnoGear’s model is the absolute best car essential oil diffuser. It has got the most functionality, and you could take it out of the car and plug it into your laptop or PC to add some fragrance to your room or office.  We liked AromaAllure fan-assisted essential oil diffuser. We think that it is a great option for situations when you need to quickly sprinkle a nice aroma into your car. And yeah, it could also be used at home and basically anywhere since it can be powered by a battery.


Welcome. My name is Gege. I am a professional freelance lifestyle writer. Over 1.5 million fans take my lifestyle advice and use products from my recommendations.

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