Best Brake Fluid Reviews 2021 Everything You Want to Know

You never let your car down for any reason. Maybe you are always aware of doing the right things for the maintenance of your loving car. But what about your braking system? Is it just a part of your routine maintenance and never looked after carefully? If so, fasten your seatbelts. The braking system is a crucial component of keeping you safe on the road. And it should be treated as an important part of your car with more consciousness.

If you want your braking system to keep you safe everywhere, it requires an essential component to operate properly: brake fluid. Surprisingly many drivers have a little or no idea about what types of brake fluid they should use in their cars.

Like there are variations in types of oil and gases, the brake fluids also have differences in types and uses. And you should use the recommended brake fluid for your cars. Indeed, it’s not an easy task for any new driver to understand the right one for their car.

Don’t worry. We are here to help you out with the best brake fluids of 2021. We have researched extensively to find the best brake fluid for any type of car you are using. Check out the down sections. This article must help you make the right decision.

Best Brake Fluid Comparison Table

Image Name Details Action
Motul Rbf 660 Dot-4 Racing Brake Fluid 500 mL Details Check Price
Prestone 32 Ounce AS401 DOT 3 Synthetic Brake Fluid-32 oz Details Check Price
Castrol 12509 Dot 4 Brake Fluid (12 Oz) Details Check Price
Bosch ESI6-32N Brake Fluid (Direct Replacement for DOT 3, DOT 4, and DOT 5.1) Details Check Price
Maxima Racing USA 80-86916 DOT 4 Brake, 16.9 Fluid_Ounces Details Check Price
Endless RF-650 DOT 5.1 Racing Brake Fluid (Compatible w/DOT 4 Fluid) (CASE of 20) Details Check Price
Motul MTL100949 8068HL RBF 600 Factory Line Dot-4 100 Percent Synthetic Racing Brake Fluid-500, 300. ml, 6 Pack Details Check Price

1. Motul Rbf 660 Dot-4 Racing Brake Fluid 500 mL

You love speed, no? Then what can be better than this brake fluid? Specially made for racing vehicles, this fluid will become the best friend to your braking system. We can say that with so confidence because the experiments we performed with this one, all came out to be exceptionally effective. The performance was satisfactory and we must say that it is the ultimate brake fluid if you want your car to be kept moving on fast always. If you love speed but never compromise the safety, you should have a go with this one.


High Performance: This works really good for complex brakes like hydraulic actuated brake and clutch systems. With this fluid, your vehicle will give you smooth and high performance, indeed. All you need to do is just pour this on your brake and achieve the surprisingly high speed.

Synthetic: The best feature of this product is that it is silicone-free and made with synthetic fluid. Synthetic fluids last longer in service. So you need not change the brake fluid so often. That will reduce the hassle of changing the fluid often.

Fire Resistant: Sometimes the clutch system gets too hot and there is a chance of fire too. But this fluid has extreme fire resistance and gives you the ultimate protection from fire.

Higher Boiling Point: It has a comparatively higher boiling point. It can guard against temperature up to 312-degree Centigrade or 594 degrees Fahrenheit. So you can speed up your car without fearing about the temperature.

Better Aerodynamic Performance: With this brake fluid, your car’s aerodynamic performance will be increased. You will get a smooth racing experience while driving.

2. Prestone 32 Ounce AS401 DOT 3 Synthetic Brake Fluid-32 oz

Now it’s time for getting the best brake fluid for cars recommending DOT 3 brake fluid. Yes, we have experimented with all the available DOT 3 fluid products and observed this one has the best all over performance. Meeting all the safety standards, this synthetic brake fluid will give your car the kind of smooth performance you are looking for. With this fluid, you will get braking power when needed by avoiding a spongy pedal. So why not check this out once?


Extra Margin of Safety: The synthetic fluid is engineered to protect your braking system from extreme conditions. With the fluid, your braking system will work so swiftly with an extra margin of safety.

Exclusive Formula: It is mixed with polyglycol ether( a kind of solvent with a higher boiling point). It ensures that, while operating, the hot brake-system will not create dangerous vapor. So you are safe from any harm that could be caused by this vapor.

Compatible: This is very much compatible with most of the used braking systems including ABS, disc, and drum brake system. It works excellent with these systems.

Inhibitor Package: It comes with a comprehensive inhibitor package. This package is designed in a way that all your vital metal components of the braking system will be well protected.

Higher Boiling Points: It complies with all the government safety standards for boiling points. It has a minimum dry boiling point up to 460 degrees Fahrenheit (238 degrees Celsius) and a minimum wet boiling point up to 284 degrees Fahrenheit (140 degrees Celsius).

3. Castrol 12509 Dot 4 Brake Fluid (12 Oz)

This is the perfect match for your braking system with compatibility for both DOT 3 and DOT 4 specifications. So, without thinking twice you can use it with any kind of braking system your cars have. Another thing is that it is specially formulated for racing and rallying where your braking system needs extreme protection. With a surprising high boiling point, it safeguards your braking system from any harsh conditions that usually occur in a racing track. If you love speed and have an urge for safety too, you should not bypass this one.


European Formula: This exclusive fluid comes with an exceptionally high-performance europian formula. Providing a higher boiling point with superior anti-vapor lock characteristics. That never lets your braking system degrades its performance.

Ultimate Safety: This amazing brake fluid will keep the superior safety of your braking system at any tough conditions during racing and rallying. Don’t fear to increase the speed of your car. With this fluid, you can now control your car quite easily.

Universal: It is compatible with both DOT 3 and DOT 4 specifications. So you need not think about the requirements of your braking system. All the things you need to do is to pour this fluid, rest of the things will be tackled by itself.

Higher Boiling Points: This fluid has exceptional boiling points for both the dry and wet boiling conditions. The typical dry boiling point is about 310-degree Celcius and the wet boiling point is 270-degree Celcius.

Easy to bleed: It can easily bleed like conventional brake fluids as it has similar viscosity as of the conventional brake fluids.

4. Bosch ESI6-32N Brake Fluid (Direct Replacement for DOT 3, DOT 4, and DOT 5.1)

Here comes another true all-rounder brake fluid you’ll find in the market. This can be used for any type of braking system. This is high quality and long-lasting fluid that will give the ultimate protection to your lovely cars. While experimenting with this one, we got exceptionally good results. With this fluid, the performance of the brakes improved quite a lot and we can proudly recommend this one for your braking system. If you want the all-around safety and mileage for your car, you should have a go with this one.


Higher Compatibility: It is compatible with any standard. That means you can use with or direct replacement for DOT 3, DOT 4, and DOT 5.1 brake fluids. It gives you the ultimate independence to use it anytime you wish without thinking about the compatibility.

Extended Service: Unlike other brake fluids it provides extended service interval. It lasts longer than other brake fluids. So, you will have a longer-lasting service period from this brake fluid than any other one.

Higher Change Interval: Where a standard brake fluid has a recommended change interval of two years, this fluid’s recommended change interval is up to 3 years. This will save your cost and time.

Lower Viscosity: It has a lower viscosity which makes it have higher wet boiling points. The wet boiling point margin is 365-degree Fahrenheit. That makes it a really outstanding product. 

Superior Standard: It exceeds all other DOT standards including  DOT 3, DOT 4, and DOT 5.1 standards.

5. Maxima Racing USA 80-86916 DOT 4 Brake, 16.9 Fluid_Ounces

Now we come to a dedicated product for you. It is specially made to meet the DOT 4 standard requirement which is recommended by most of the modern car manufacturers. This brake fluid has all the abilities to make your braking system working with more synchronization. It keeps your car protected from any harmful conditions like water contamination and vaporization. With this fluid, you will get high performance and protection. Whether you have a racing car or a regular one, this brake fluid will be the correct choice for you.


Extensive Performance: This brake and clutch fluid is specially designed to provide high performance. It will lubricate and protect your critical brake system components extensively while letting you reliable stopping power.

Extra Safety: It comes with anti-vapor lock formulation that maintains the responsiveness and performance by fighting both water contamination and vaporization. With this fluid, you are worry-free of any harm caused by the dangerous vapor generated while your car is at a high speed.

Advanced Formula: It has an exclusive formula that resists corrosion and oxidation of the braking system components. It is also highly compatible with SBR, EPDM and natural rubbers. So it is very much safe to use without fearing for the degradation of your braking system elements.

Exceed Requirements: It exceeds many of the requirements modern-day cars have. It successfully meets the requirements of US FMVSS 116 DOT 3 & DOT 4, SAE J1703, SAE J1704 and ISO 4925 (Classes 3 & 4).

Excellent Boiling Points: It has exceptionally higher boiling points than many other products. The dry boiling point is up to 469°F (243°C) and the wet boiling point is up to 318°F (159°C). That means you will get an extra margin of safety driving the car with higher speeds.

6. Endless RF-650 DOT 5.1 Racing Brake Fluid (Compatible w/DOT 4 Fluid) (CASE of 20)

If you’re still roaming around and can not make a decision. Why not have a look at this one? Like all the products we have placed above, it is also an unparallel brake fluid. It has better stability and longevity than many other products found in the market. What separates it from other brake fluids is that it maintains a higher boiling point. With this fluid, you can enjoy a consistent performance for a long time without flushing. It is recommended by racing car manufacturers like Porsche in their race cars. It is also compatible with general automobiles.


Better Stability: This brake fluid offers amazing stability as it can maintain the dry boiling point very well. Now you need no multiple flushing per season. With this fluid, the brakes give an uninterrupted performance for a long time.

Superior Compressibility: It has superior compressibility characteristics that set this apart from other fluids. It compresses much less than other brake fluids. With this fluid, you will get a much stiffer and consistent brake pedal. This quality makes it a reliable braking systems companion.

Compatible: It exceeds all the DOT specifications. That means you can use it for any braking systems.

Supreme Boiling Control: It maintains excellent dry and wet boiling points. The average dry boiling point is up to 328 degrees Celcius and the wet boiling point is up to 218 degrees Celcius.

7. Motul MTL100949 8068HL RBF 600 Factory Line Dot-4 100 Percent Synthetic Racing Brake Fluid-500, 300. ml, 6 Pack

Motul MTL100949 8068HL RBF 600 Factory Line Dot-4 100 Percent Synthetic Racing Brake Fluid-500, 300. ml, 6 Pack is 6 Pack. Dry boiling point 594 degrees F Motul 600 brake fluid is 100 per cent synthetic and has an extremely high boiling point. Helping to prevent vapour lock and brake fade during hard use. This brake fluid exceeds both DOT 3 and DOT 4 specifications


Manufacturer: Motul

Brand: Motul

Item Weight: 8.4 pounds

Product Dimensions: 10 x 8.9 x 7.5 inches

Item model number: 8542049331

Discontinued By Manufacturer: No

Manufacturer Part Number: 100949_6PACK


Best Brake Fluid Buying Guide:

As you have learned already, brake fluids are important. So important that you need to be extremely cautious before put it into your braking system. There are quite a number of things you should consider to choose one and we can not but say you one thing, you must have a good grip on the “know how’s” of brake fluids. This knowledge will surely help you make the optimal decision about this important agent of your car’s braking system.

But where you can learn all the stuff? Don’t worry. That’s why we are here. We have researched all those things one should take into consideration before moving out for buying the best brake fluid for his dearest car. Here we enlisted all the things you need to know. Check the guide out!

Type of the Fluid: There are mostly three types of brake fluids classified by DOT numbers. They are DOT 3, DOT 4, and DOT 5 brake fluids. Both DOT 3 and DOT 4 are poly glycol based but they differ at boiling points. DOT 3 products are recommended for small-sized vehicles. Whereas DOT 4 products are specially considered for large-sized vehicles as they would produce more heat. DOT 5 brake fluids are totally different in composition, they are silicone-based and have higher boiling points.

Most of the time car manufacturers recommend the kind of brake fluid is compatible with the braking system. In that case, you should use that type.

Boiling Points: Your car’s braking system produces immense heat. So the fluid you are using must have the ability to cope up with the heat. That means it should have the dry and wet boiling points higher than the actual heat of the braking system. The dry boiling point is considered when the fluid is new and the wet boiling point is taken into account when the fluid is contaminated with water after a certain period of time. Try to seek the kind of fluid that has the highest boiling points and compatible with your vehicle.

Water Absorption: Braking systems are mostly made of rubber making the system porous letting moisture penetrate slowly. So the brake fluid becomes contaminated with water. Water has a less boiling point and thus when mixed with the brake fluid, generates dangerous vapor. This vapor can ruin the whole braking system and degrades the performance of your brakes. This is why you must choose the fluid that has good water absorption ability or a vapor lock feature.

Compatibility: Many of the fluids are specially designed for certain braking systems like disk brakes or drum brakes. Some designed for every type of brakes. You should carefully check the fluid whether it is compatible with your brake. Otherwise, this will cause serious issues.

Corrosion Resistance: This attribute is neglected most of the time. Your brake fluid must repel corrosion in areas such as master cylinders, wheel cylinders, and calipers. Look for a product that offers the corrosion-resistant features. Do check whether the fluid has corrosion resistance additives added.

Viscosity: The brake fluid must maintain a steady viscosity with respect to the temperature change of the braking system. This will ensure the stability of your braking system and help it function properly. 

Best Brake Fluid FAQ:

What is the best brand of brake fluid?

There are quite a number of good brands and can not choose the best brand so easy. It depends on your specific brake system’s requirements.

If you have a racing car or the vehicle requires DOT 4 brake fluid, the Motul std color Dot-4 Racing Brake Fluid is the best brand for you. Though it is compatible with other types of vehicles too.

For DOT 3 required brake systems, Prestone DOT 3 Synthetic Brake Fluid is the best for overall performance

What is the difference between DOT 3 and 4 brake fluid?

They differ mostly in boiling points.

Both DOT 3 and DOT 4 brake fluids are polyglycol based. DOT 4 has higher dry and wet boiling points than that of DOT 3 brake fluids. Moreover, DOT 4 products have higher compatibility with vehicles ranging from big and small. DOT 3 brake fluids are usually recommended for small-sized cars.

Though you can use DOT 4 products instead of DOT 3 fluids. But the reverse is not sensible at all.

Nowadays most of the vehicles are compatible with both DOT 3 and DOT 4 fluids. So it won’t pose any threat using them interchangeably. But if your car manufacturer recommends a specific type, you should stick to that. 

Can synthetic brake fluid be mixed with regular brake fluid?

No! Not at all. It’s a very bad idea to mix up different types of fluids together because it will create unprecedented boiling points.

Generally synthetic and regular fluids vary in the formula. Synthetic fluids use silicone as base fluid and regular fluids are mostly polyglycol based. As they have a difference in chemical composition, they won’t be compatible to mix up. And many brakes requires you to use a strict type of brake fluids all the time. So, never do that.

Though you can mix up fluids of the same DOT specification, but it also should be avoided for safety.

How much brake fluid do I need to flush?

You need at least one liter of fluid, often slightly more than that for doing a flush.

Never mix the new fluid with the remainder in the reservoir. This is malpractice because old fluids will contaminate this newer fluid with moisture and degrade its water absorption ability. Before bleeding, throw out all the older fluid and then pour the newer one. 

You should flush the brakes after 30,000 kilometers of driving or once a year.  

Can I just add brake fluid?

No! You can not just buy a bottle of fluid and pour it directly into the reservoir. You need to take some measures before that. First of all, bleed out all the remaining fluid from the reservoir. Because when contaminated with older fluid, the newer fluid will downgrade in performance. This little bit of precaution will help your fluid to sustain long and provide better performance.

Can I replace my own brake fluid?

Surely you can if you have enough competence to change the brake fluid. It is a very simple task indeed. But you have to be cautious about the process. Always make sure that you are using the exact kind of fluid your system requires (i.e. whether it has a DOT 3 or DOT 4 specification). Then you should empty up the whole tanker before pouring the brake fluid so that it does not corrupt with the older fluid. And keep in mind the safety concerns while performing the task.

What is the best DOT 3 brake fluid?

There is a number of good brands out in the market. But we have seen that the Prestone DOT 3 Synthetic Brake Fluid provides the best overall performance in case of DOT 3 specification. It has higher boiling points than other brands. It is compatible with every type of brakes. It also provides an extra margin of safety by protecting brakes from the dangerous vapor. You can use it without any concern at all.


Here we presented all the best brake fluids we have tested rigorously. These products are reliable and always provide the finest performance for your brakes. But before proceeding to buy any of them, please make sure that you have checked the brake fluid review carefully. The products presented here are standalone for their specific purpose and use. So do remember their variations and the requirements of your brake system. Then match the specifications with the perfect one.

Brake fluid is very important for your brakes and it can not be negligible at all. You can not be in a hurry to buy one. We would recommend you to consider every aspect of it. If you still have confusion, you can check the buying guide and the FAQ section. This will surely help you to make the right decision.

Select your car to get specific car parts