How to Identify the Quality of Brake Fluid?

[DiAnnie]

Substandard or poor-quality brake fluid can corrode the rubber seals in the brake master cylinder and negatively impact braking performance. To assess brake fluid quality, consider the following three key indicators: 1. Boiling Point: Inferior brake fluid has poor high-temperature resistance, easily vaporizing under heat to form visible bubbles, which create airlocks in the brake lines and hinder proper fluid flow. 2. Low-Temperature Fluidity: Based on the kinematic viscosity characteristic of brake fluid, this refers to its flowability in cold conditions. In frigid northern regions, qualified brake fluid maintains normal flow, while substandard fluid may partially or fully solidify, severely compromising braking performance. Worse, if frozen fluid expands and ruptures brake lines, catastrophic consequences may follow. 3. Corrosiveness: Methanol-based or adulterated brake fluids exhibit strong metal corrosion. Testing involves immersing metal objects to observe rust formation.