Final answer:
Brake fluid must meet minimum standards set by regulatory agencies, such as the Department of Transportation (DOT). The DOT classifies brake fluids into four main types: DOT 3, DOT 4, DOT 5, and DOT 5.1. Each type has different characteristics and is suitable for specific applications.
Step-by-step explanation:
Brake fluid must meet minimum standards set by regulatory agencies, such as the Department of Transportation (DOT) in the United States. These standards are important for ensuring the safe and reliable operation of a vehicle's braking system. The DOT classifies brake fluids into four main types: DOT 3, DOT 4, DOT 5, and DOT 5.1.
Each type of brake fluid has different characteristics and is suitable for specific applications. For example, DOT 3 and DOT 4 fluids are glycol-based and are commonly used in vehicles with conventional braking systems. They have a higher boiling point compared to DOT 3 fluids, making them suitable for vehicles that may experience higher braking temperatures.
On the other hand, DOT 5 and DOT 5.1 fluids are silicone-based and are primarily used in vehicles with specialized braking systems, such as those equipped with ABS (anti-lock braking system) or traction control. Silicone-based fluids are less hygroscopic, meaning they absorb less moisture, which can help prevent moisture-related brake system issues.