DOT 3 Brake Fluid? (Perfect answer)

  • DOT 3 brake fluids are petroleum/non-mineral based, non-silicone, and fully synthetic brake fluid designed for use in a wide range of clutch and brake applications. It is made by mixing alcohol and glycerin. The brake fluid is based on polyethylene glycol ether technology for high performance.

What is DOT 3 brake fluid for?

Mobil Brake Fluid DOT 3 is a high performance hydraulic brake fluid for use in automotive disc, drum and anti-skid brake systems and clutch systems.

Can I use DOT 4 instead of DOT 3?

Yes, DOT 3 brake fluid is compatible with DOT 4 brake fluid. However, DOT 4 offers a higher boiling point. It’s compatible with DOT 3 and DOT 4 fluid.

Is it bad to mix DOT 3 and DOT 4 brake fluid?

Can you mix Dot 3 and Dot 4 Brake Fluid? Yes, Dot 3 and Dot 4 brake fluid can be mixed. It’s because both these are glycol-based brake fluids, which means that they are compatible with each other.

Can I use any brand DOT 3 brake fluid?

Brands do not matter. Brake fluid is rather simple in design. Dot 3,4, and 5.1 can all be mixed. The difference is, as the number increases, so does the boiling point of the fluid.

Are all DOT 3 brake fluids the same?

All DOT 3, 4 and 5.1 brake fluids are compatible with each other and with all systems. All polyethylene glycol-based fluids will not harm healthy rubber parts. If you have an older vehicle and are worried about boiling the fluid, use DOT 4 or 5.1 brake fluid.

Can I use any brake fluid for my car?

There are multiple different types of brake fluid that can be used for your vehicle. Glycol based – this includes brake fluids such as DOT3, DOT4 and Super DOT4. Silicone based – an example of a silicone-based brake fluid is DOT5.

What happens if you use the wrong DOT brake fluid?

If you notice that your brake fluid is low your vehicle needs a brake system service. Hooked up gears – Automatic transmissions should only use the fluid that is specified by the automaker. Using the wrong fluid can cause overheating, bad lubrication, and can permanently damage your vehicles transmission.

What happens if you use the wrong brake fluid?

Using the wrong fluid can cause poor lubrication, overheating, and possibly transmission failure. A mechanic might not be able to reverse the damage, even by flushing the transmission. Mistakenly adding motor oil or brake fluid can also destroy your transmission.

Which brake fluid is better DOT 3 or DOT 4?

The primary differences between the two include the following: DOT 3 brake fluid will absorb less water than DOT 4 from the air over time, meaning you’ll need to have your fluid changed less frequently. DOT 4 brake fluid has higher dry and wet boiling points, making it safer for higher temperatures.

Is Lucas brake fluid good?

Using a high-quality blend of polyethylene glycol ethers and other proprietary additives, Lucas DOT 3 and DOT 4 brake fluids provide excellent lubricity and protect against rust and corrosion. The main difference between Lucas’ DOT 3 and DOT 4 are their boiling points and their tendency to absorb water.

Which brake fluid should I use?

By far, DOT 3 is the most popular. It’s been in use for a very long time. Fresh DOT 3 has a boiling point of 401 degrees Fahrenheit; fully degraded, it drops to 284 degrees Fahrenheit. This makes your brake fluid much more likely to boil.

Who makes the best brake fluid?

Our pick for the best brake fluid is the Motul Dot-4 100 Percent Synthetic Racing Brake Fluid. While it’s slightly pricier than other brands, it improves pedal feel, protects against water penetration, and increases performance for both daily drivers and racers.

Can I mix old and new brake fluid?

Brake fluid is prone to absorbing water, which is one of the reasons you replace it. You CANNOT reuse fluid, and you CANNOT mix old with new.

What brake fluid can you mix?

Since DOT 4 and 5.1 are both glycol-based brake fluids they are compatible with each other, which means they can be readily mixed without harming your brake system. It is important never to mistake DOT 5.1 (glycol-based) with DOT 5 which is silicone-based and should never be mixed with any other DOT fluid.

Can you use synthetic brake fluid with regular brake fluid?

Yes, you can switch between fluid labelled as “synthetic” or regular brake fluid and you can mix synthetic and regular brake fluids. ALL brake fluid is “synthetic” in that it is not made from any petroleum products; it’s a “lab” manufactured product.

DOT 3 and DOT 4 Brake Fluid: What’s the Difference? – AMSOIL Blog

In terms of boiling points, the fundamental difference between DOT 3 and DOT 4 brake fluid is the lower boiling point of DOT 3. I have a sneaking suspicion that I know what you’re talking about. In terms of boiling points, the fundamental difference between DOT 3 and DOT 4 brake fluid is the lower boiling point of DOT 3. I have a feeling I know the answer to your next inquiry. But first, a little background information. The Department of Transportation (DOT) of the United States divides brake fluid into four major classifications:

Their primary differences are their wetdry boiling points and their composition.

Dry Boiling Point Wet Boiling Point Composition
DOT 3 205°C/401°F 140°C/284°F Glycol Ether
DOT 4 230°C/446°F 155°C/311°F Glycol Ether/Borate Ester
DOT 5 260°C/500°F 180°C/356°F Silicone
DOT 5.1 260°C/500°F 180°C/356°F Glycol Ether/Borate Ester

DOT 3 is the most commonly seen kind in today’s automobiles and trucks. DOT 4 fluid, on the other hand, is gaining popularity as a result of the growing usage of anti-lock braking systems and traction control, which benefit from the reduced viscosity of DOT 4 fluid.

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Are DOT 3 and DOT 4 brake fluid compatible?

To the best of our knowledge, DOT 3 brake fluid is compatible with DOT 4 brake fluid. DOT 4 has a greater boiling point, on the other hand. Because of its high boiling point, DOT 5.1 is commonly used in high-performance and heavy-duty applications. Compatible with both DOT 3 and DOT 4 fluids, it is a good choice. DOT 5 brake fluid is silicone-based, which means that it does not absorb moisture. Incompatible with other brake fluids, it is usually used in antique automobiles that are kept in storage for lengthy periods of time and require a brake fluid that does not collect water throughout that time period.

Bring it to a boiling point

As a result, we’ve returned to the boiling point. What exactly does it mean? After all, we aren’t preparing this food ourselves. You are, in fact, cooking it under the proper operational and environmental conditions. Because of the heat, the brake rotor is burning red.” data-image-caption=”Aggressive braking might result in high heat.” data-image-caption=” loading=”lazy” data-medium-file=” data-large-file=” data-small-file=” width=”300″ height=”232″ src=” alt=”Dot 3 and Dot 4 brake fluid” width=”300″ height=”232″ src=” alt=”Dot 3 and Dot 4 brake fluid” “> The following is an example of a formalized formalized formalized Braking too quickly might result in severe heat buildup.

  • When you brake, the friction between the brake pads and the rotors creates a lot of heat.
  • When the brakes are used, the extreme heat can evaporate the brake fluid, causing it to become compressible.
  • As a result, gas remains in the lines, which is compressible, resulting in a spongy pedal.
  • When it comes to driving as effectively and safely as possible, the driver must have confidence in the brakes’ ability to work on lap 10 as well as they did on lap 1.
  • Gases are released by the pads, which minimizes the amount of contact between the pads and rotors.

The synthetic brake fluid from AMSOIL is DOT 3DOT 4 synthetic brake fluid.” ” data-image-caption=”” data-medium-file=” data-large-file=” data-loading=” data-image-caption=”” data-loading=” “sluggish the following: ” width=”150″ height=”300″ src=” alt=”DOT 3DOT 4 Brake fluid”> DOT 3DOT 4 Brake fluid

Brake fade isn’t just for racers

If you ride or pump the brakes while descending a steep hill, especially when transporting a large load or towing a trailer, you may produce a great amount of heat. PRO TIP: Before descending a steep hill, downshift into a lower gear to make the descent more manageable. You may find that your pedal has nearly reached the floor by the time you reach the bottom, causing your pulse rate to practically triple. Even if you enjoy throwing your car around a twisty rural road for a little therapy, standing on the brakes when entering curves might generate enough heat to cause brake fade.

AMSOIL DOMINATOR Synthetic DOT 4 Racing Brake Fluid is a synthetic DOT 4 racing brake fluid.

The higher the DOT classification, the higher the boiling point, and hence the greater the fluid’s ability to withstand high heat temperatures.

Boiling point is separated into drywet boiling points

In order to establish the dry boiling point, it is necessary to use fresh fluid that has been removed from a new container. Wet boiling point is established by testing a fluid that has been polluted with 3.7% water, and it is always lower than the dry boiling point of the fluid. The reason why a testing administrator would pollute excellent fluid is unclear. We believe this is because it is a mirror of what occurs in the actual world. Brake fluid is ishygroscopic, which means that it absorbs water when it is used (except silicone-based DOT 5 brake fluid).

It is possible for moisture to infiltrate the system when you remove the reservoir lid to add fluid, through deteriorated seals, or even through the rubber brake lines itself.

Because brake fluid may degrade over time, it’s critical to replace it on a regular basis.

In passenger cars, it is recommended that the brake fluid be changed every other year, and in racing vehicles, it is recommended that the brake fluid be changed at least once each year.

Watch now: How to bleed brakes

However, it is not too late to get started.

And while you’re at it, have a look at our selection of brake fluids for your car. Updated. The original version of this article was published on February 27, 2018.

Prestone 32 Brake Fluid Dot3

Prices, promotions, styles, and availability are subject to change without notice. We do not honor online prices at any of our local locations. Prices and availability of products and services are subject to change at any time and without prior notification. If any mistakes are discovered, they will be addressed, and Lowe’s has the right to rescind any advertised offer and rectify any errors, inaccuracies, or omissions, even after an order has been submitted, without prior notice.

  • Fluid Life of 50,000 Miles
  • High Grade Formula Prevents Overheating and Brake Fade
  • Protects against performance degradation due to water absorption
  • 50,000 Mile Fluid Life


Prestone® DOT 3 motor vehicle brake provides improved performance as compared to DOT regulations, which is beneficial to all cars that require DOT 3. In order to guard against overheating, brake fade, and performance degradation caused by water absorption, this synthetic fluid starts with a higher dry boiling point than the DOT minimum norm. Also included in the formulation of this long life (50,000 mile) fluid is the ability to resist corrosion of all metals inside the braking system. All DOT 3 braking systems (ABS, disc, or drum) may be safely used with this formula, which is safe to use with any DOT 3 fluid.

  • Fluid Life of 50,000 Miles
  • High Grade Formula Prevents Overheating and Brake Fade
  • Protects against performance degradation due to water absorption
  • 50,000 Mile Fluid Life The corrosion of all metals within the braking system is prevented by this product. Formulation with a synthetic, extended fluid life
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Fluid ounce is the unit of measurement (s) Unit of Measure Quantity32Californians should be aware of the Proposition 65 warning (s)

BG DOT 3 Brake Fluid

Braking fluid with the highest level of high temperature protection and moisture resistance is PN 850BG DOT 3 Brake Fluid. It is recommended for all DOT 3 disc and drum brake systems. Brake systems are capable of producing pressures of up to 2000 pounds per square inch. This pressure, along with the tremendous heat generated by frictional braking, causes brake fluid to degrade and break down. If the brake fluid is not properly conditioned, it will boil at a lower temperature, resulting in air pockets and moisture in the braking system.

  1. BG DOT 3 Brake Fluid: BG DOT 3 brake fluid is a high-performance brake fluid.
  2. It protects against dampness.
  3. Locate a store in your area that provides the BG Brake Service!
  4. To discover more about the entry criteria, service intervals, and covered components, please visit this page.

PN 85012 is a 12-ounce (354-milliliter) bottle. Bottle with a capacity of 32 fluid ounces (946 milliliters). Bottle with a capacity of 48 fl oz (1.4 L). Bottle with a capacity of 64 fl oz (1.8 L). MADE IN THE UNITED STATES OF AMERICA

Synthetic Brake Fluid Dot 3 & 4

In addition to meeting or exceeding the industry minimum dry boiling point of 401 degrees Fahrenheit, Lucas DOT 3 Brake Fluid also contains a high-quality combination of polyethylene glycol ethers and additives. The vehicle complies with the Federal Motor Vehicle Safety Standards (FMVSS) No. 116 and the standards of SAE J1703. Lucas DOT 3 Brake Fluid is indicated for use in disc and drum brake systems, as well as clutch systems, where this type of fluid is specified. This high-quality combination of polyethylene glycol ethers and additives meets or exceeds the minimum dry boiling point of 446 degrees Fahrenheit required by the industry.

116 as well as the SAE J1704 standards, among others.

Key Benefits

  • Prevents the hardening or softening of the seal
  • It provides protection against rust and corrosion. This product has outstanding lubricity. This product is compatible with all rubber components and other fluids in the braking system.


  • Cases of 12 Ounce (10825) weigh 15 lbs
  • Cases of 1 Quart (10826) weigh 27 lbs
  • Cases of 6 Ounce (10826) weigh 13.5 lbs
  • And Cases of 10825-6 weigh 13.5 lbs.
  • 10788-6 – 1 Quart 10788-6 (Case of 6) The following items weigh 13.5 pounds: 10827 – 12 Ounce (Case of 12)
  • 10827 – 12 Ounce (Case of 12)


The most recent update was on August 30, 2021. Breathing brake fluid is a type of hydraulic fluid that is responsible for actuating the braking system of a vehicle. A non-compressible material is held in the brake lines, exerting pressure on each of the rotors positioned in each of the vehicle’s four corners.

How do Brake Fluids Work?

When we push the brake pedal, a piston in the brake caliper is compressed, which results in the brake system being hydraulic. The effort exerted by the brake pedal results in a buildup of pressure inside the brake lines, which causes the brake rotors to press on the brake pads. This creates friction, which causes the wheels to cease rotating and the vehicle to come to a complete stop. The friction between the wheels converts the vehicle’s kinetic energy into thermal energy, which is where the braking fluid enters the picture.

These can also be split down further based on the grade they represent.

Silicone-based brake fluids are only effective in vehicles that do not have anti-lock braking systems.

The Difference Between DOT 3 and DOT 4

Department of Transportation (DOT) classification numbers 3, 4, and 5.1 are assigned to these glycol-based braking fluids, respectively. Because there are no precise standards from the government, it is not necessary to classify these braking fluids according to their chemical makeup. This implies that there isn’t a standard brake fluid formulation. Having said that, they are required to satisfy certain conditions set out by the government. Detailed requirements for equilibrium reflux boiling point (dry and wet boiling points), kinematic viscosities, pH values, high-temperature stability, chemical stability, corrosion and water tolerance, compatibility (sludging, sedimentation, and crystallization), and resistance to oxidation are detailed within the specifications DOT3 brake fluid is the most often encountered type of brake fluid among daily drivers.

You may expect to find this kind in the majority of automobiles and trucks.

Because DOT4 has a greater boiling point than water, it has found application in racing vehicles and police vehicles.

Because of the rising use of anti-lock braking systems (ABS) and traction control, DOT4 has also begun to rise in favor. Please keep in mind that DOT4 is compatible with DOT3, but not the other way around.

Boiling Points

The boiling point is the most significant distinction between DOT3 and DOT4. This is the temperature at which the fluid evaporates and also the temperature at which the fluid is most susceptible to absorbing water. Both DOT3 and DOT4 are hygroscopic, which means that they absorb water when exposed to air. The lower boiling point of DOT3 makes it more susceptible to water absorption than other compounds. As a result, DOT3 boils significantly more easily when subjected to heavy braking, making it less appropriate for the activities listed above.

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This is accomplished by utilizing the fluid from a brand new container to calculate the dried boiling point.

It is the latter that represents a real-world scenario as described by the Department of Transportation in their testing settings.

The quality of your fluid will deteriorate as a result of this.

Dry Boiling Point Wet Boiling Point
DOT 3 205 °C. (401 °F.) 140 °C. (284 °F.)
DOT 4 230 °C. (446 °F.) 155 °C. (311 °F.)

Chemical Structures

To reiterate what was said above, no exact specifications for the chemical structure are required, provided that they match the conditions that we mentioned. DOT3 braking fluid is typically made out of diethylene glycol as a base (DEG). While not a necessity, it appears to be the most cost-effective method for manufacturers to comply with the mentioned standards, therefore we’re included it. In essence, the brake fluid industry has self-regulated and established that this is the norm for all braking fluid applications.

Because of the presence of borate, the brake fluid can withstand greater temperatures.


The boiling points of DOT3 and DOT4 fluids, to put it simply, are the primary difference between the two classes of fluid. Except for DOT4, which contains borate to raise boiling temperatures, there isn’t much difference between them. When it comes to replacing brake fluid, it’s always better to refer to the manufacturer’s recommendations first. The answer to this topic appears to be all over the place, with responses ranging from being dependent on miles to being based on the amount of time since the last brake fluid replacement.

  • A GIF of the hydraulic brake system, courtesy of KDS444 on Wikipedia

FVP DOT 3 and DOT 4 Brake Fluid

FVP’s Synthetic DOT 3 Brake Fluid is a great product that is designed with safety and performance in mind. It helps to extend the life of your brakes while also improving overall performance and safety. FVP’s Synthetic DOT 3 Braking Fluid is compatible with DOT 4 brake fluids and has a minimum wet boiling point of 284°F and a minimum dry boiling point of 450°F. It is non-flammable and has a minimum dry boiling point of 450°F. FVP’s Synthetic DOT 3 Brake Fluid meets or exceeds the requirements of DOT 3 as well as all other Federal and SAE criteria and standards for brake fluids used in motor vehicles.

It also complies with SAE J1703 specifications. It is compatible with all DOT 3 authorized brake fluids and is intended for use in all disc brake, hydraulic drum, and anti-lock braking systems that need DOT 3 brake fluid, including ABS brake systems.

FVP DOT 4 Brake Fluid

Brake fluid that meets DOT 4 specifications from FVP has particular chemicals that help to prevent vapor lock and moisture absorption in the brake fluid. FVP’s DOT 4 Brake Fluid meets or exceeds the criteria for both DOT 3 and DOT 4 brake fluids, as well as Federal Motor Vehicle Safety Standard No. 116 (FMVSS No. 116). It also complies with SAE J1703 specifications. FVP’s product, which is particularly developed for DOT 4 brake fluid applications, is intended to aid in the improvement of braking performance.

FVP’s DOT 4 Brake Fluid is intended for use in disc brake, hydraulic drum, and anti-lock braking systems that need DOT 4 or DOT 3 brake fluid, among other applications.

Valvoline Dot 3 and 4 Brake Fluid – Valvoline Chemicals

The DOT 3 or DOT 4 brake fluid is a premium quality suitable for all ABS, drum, and disc braking systems that require DOT 3 or DOT 4 fluid. Featuring a high dry boiling point to limit the danger of fluid evaporation and brake failure, Valvoline TMBrake Fluid’s low-moisture composition delivers exceptional vapor lock prevention for optimal braking performance while also protecting the brake system against corrosion.

  • Compatible with all DOT 3DOT 4 fluids
  • Low moisture activity
  • Improves ABS effectiveness
  • Ideal for hydraulic disc brakes
  • Blends well with traditional brake fluid Complies with all of the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 116SAW J1703

How to Use:

Due to the fact that brake fluid attracts moisture, it should always be stored in a dry environment with the top tightly fastened. Remove any dirt or oil from the surrounding region before attempting to access the master cylinder to avoid contaminating the braking fluid with these substances. When it’s pouring or snowing, avoid opening the master cylinder outside. If you are in an area where there is a lot of dust or dirt in the air, avoid opening the master cylinder. Check the amount of the fluid in the reservoir and replenish it to the level advised by the vehicle’s manufacturer if necessary.

Brembo brake fluid, which functions as a hydraulic fluid, doubles the power applied to the brake pedal by your foot and transfers it to the brake pads, which generates friction on the rotors and causes the car to slow down.

Most auto manufacturers recommend that glycol-based brake fluid be changed or flushed every 1-2 years, depending on the vehicle.

Water is absorbed into the brake fluid over time through the hoses and seals of the vehicle, resulting in diminished performance and, in extreme cases, brake failure.

For the reason that brakes cause friction, which results in the generation of heat, your brake fluid must be capable of withstanding high temperatures.

Consult your vehicle’s owner’s handbook to ensure that you’re using brake fluid that is appropriate for your car.

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