Brake fluid is a critical component of any vehicle's braking system, and choosing the right type is crucial to driving performance and safety. In this comprehensive guide, we'll look at what type of brake fluid you need and how to choose the best brake fluid for your vehicle. You'll learn about the types of brake fluid, their characteristics and how sports brake fluid can improve performance in extreme conditions.

1. Why is it important to choose the right brake fluid?

The brake system relies on brake fluid to transmit pedal pressure to the brakes at the wheels. If the brake fluid is not right for your vehicle or your needs, the system is likely to malfunction, which can increase stopping distances or, in extreme cases, cause failure. Choosing the right brake fluid helps ensure a safe driving experience and optimises the life of the brake system.

2. Types of brake fluid: Which one is best for your vehicle?

There are several types of brake fluid, classified mainly according to their chemical composition and boiling point. Below, we review the most common ones:

●DOT 3: This fluid is the most common in everyday vehicles. It is hygroscopic (absorbs moisture from the environment) and has a boiling point suitable for most street cars.

●DOT 4: Similar to DOT 3, but with a higher boiling point. This type is preferred in high performance vehicles or those that frequently experience heavy braking.

●DOT 5: Made from silicone, this fluid is non-hygroscopic and has a high boiling point. However, it is not compatible with conventional braking systems using DOT 3 or DOT 4, and is mainly used in classic and racing vehicles.

●DOT 5.1: Combines the advantages of DOT 4 and DOT 5, with a high boiling point and is suitable for modern, high-performance brake systems.

3. How to choose the best brake fluid for your car?

Selecting the best brake fluid involves considering the type of vehicle, how you use it and the climate in which you drive. Here are some guidelines to help you decide:

● Regular city use: For most everyday city vehicles, DOT 3 or DOT 4 is usually sufficient.

● Sport or intense driving: In cases of high-speed or loaded driving, DOT 4 or DOT 5.1 may be more suitable, as they have a higher boiling point.

● Extreme climates:In high temperature environments, consider a fluid with a high boiling point, such as DOT 5 or DOT 5.1.

4. Differences between brake fluids: DOT 3, DOT 4, DOT 5 and DOT 5.1

Each type of brake fluid has specific characteristics. In the following, we take a closer look at each one:

DOT 3; DOT 3 brake fluid is the most common brake fluid used in regular vehicles. It is suitable for normal conditions and has a boiling point of around 205°C dry.Its major disadvantage is that it absorbs moisture quickly, which can reduce its effectiveness if not changed regularly.

DOT 4; DOT 4 is ideal for medium performance vehicles and is more heat resistant than DOT 3, with a boiling point of around 230°C dry. If you drive in mountainous or hilly areas, DOT 4 can be an excellent choice.

DOT 5; DOT 5 is a brake fluid made from silicone. It does not absorb moisture and has a high boiling point, but is not compatible with systems using DOT 3 or DOT 4. It is most commonly used in classic and military vehicles.

DOT 5.1; DOT 5.1 combines the characteristics of DOT 4 and DOT 5 fluids, offering a high boiling point and good moisture resistance, but is compatible with systems using DOT 3 and DOT 4.