5 Types Of Brake Fluid

Brake fluid is an important component of a vehicle’s braking system, facilitating the transfer of force when a driver presses the brake pedal. However, not all brake fluids are the same; they come in different types, each with distinct chemical properties, boiling points, and compatibility with various brake systems. Understanding these differences can help you choose the right type for your vehicle, especially when consulting a reliable brake fluid supplier.

DOT 3 brake fluid:

DOT 3 is a glycol-based brake fluid commonly used in vehicles with standard braking systems. It has a moderate boiling point, making it suitable for regular commuting but not ideal for high-performance applications. DOT 3 brake fluids absorb moisture over time, which can reduce its effectiveness, so it requires regular maintenance and replacement.

DOT 4 brake fluid:

DOT 4 fluids is also glycol-based but offers a higher boiling point than DOT 3, making it more suitable for vehicles that experience intense braking, such as some performance cars. DOT 4 can withstand higher temperatures without vaporising, reducing the risk of brake fade. However, it also absorbs moisture, which can compromise performance over time.

DOT 5 brake fluid:

DOT 5 brake fluids are silicone-based, making it incompatible with DOT 3 and DOT 4 systems. This type does not absorb moisture, which helps it maintain performance over time. It is commonly used in military and classic vehicles where long-term storage is common. However, DOT 5 can create a spongy feel in the brake pedal, making it unsuitable for some performance applications.

DOT 5.1 brake fluid:

Though the naming is similar, DOT 5.1 is glycol-based, not silicone-based like DOT 5. It offers a higher boiling point than DOT 4, making it suitable for high-performance or heavy-duty applications. DOT 5.1 fluids is compatible with both DOT 3 and DOT 4, but like other glycol-based fluids, it requires regular maintenance due to moisture absorption.

Mineral oil brake fluid:

Mineral oil-based brake fluids, such as LHM, are commonly used in specific European car models and bicycle hydraulic brakes. Unlike glycol-based fluids, mineral oils do not absorb moisture, offering consistent performance. However, they are only compatible with specific braking systems and cannot be mixed with other brake fluid types.