There are a few types of brake fluids that are normally used. One is called dot3, and another one is called dot4 brake fluid,
but what are the differences between these two?

Brake fluid classifications

· Dot3 brake fluid is considered to have the standard measurements required to take care of the normal braking system in a car.
They have the capacity to handle heat up to certain temp due to its chemical components.

· Dot4 brake fluid works in the same manner as the dot3 fluid, however, it is a better fluid because it is capable of handling problems related to manufacture or improper usage of other brake fluids, thus becoming a more reliable component.

Components

· Dot3 break fluid contains a mixture of polyalkyelen glycol and ether. They function very well in wet and heated conditions, as the brakes tend to heat up with constant usage, and that is the most important factor that the fluid needs to handle.

· Dot4 break fluid contains borate, which is added to the glycol to make it more apt for the boiling point. The combination allows for the chemical stability of the fluid, even at very high temperatures, and water tolerance, which is very important for the proper functioning of the whole breaking system.

Strengths

· Dot3 brake fluid has a very good dry boiling capacity, and a very good wet boiling capacity as well. Once the fluid is exposed to the atmosphere and to water they act quickly, and very well.

· Dot4 brake fluid acts better with a dry boiling capacity, however, they do not act so fast when it comes to the wet boiling capacity.

It is very important to understand the purpose of these components which may seem to be so insignificant, but that are however, extremely important for your car’s system.
The brakes of your car are perhaps the most important thing that you need to keep in good working order, and understanding its functions is very important.

Summary:

1. Dot3 fluid is the standard brake fluid approved for usage on every car.

2. Dot4 brake fluid is more complex, as it helps to maintain your braking system, as well while trying to handle any bad effects.

3. Dot3 is a glycol component which is good for boiling and heating resistance.

4. Dot4 contains borate to raise the boiling points of the fluid, and still handle corrosives