How to read brake-fluid DOT ratings

DOT 5 and DOT 5.1 are different

DOT 3, DOT 4 and DOT 5.1 are non-silicone categories; DOT 5 is silicone-based. Their similar names hide different material properties and system compatibility, so DOT 5 is not a direct upgrade from DOT 4.

Keep water and contamination out

Keep an opened container clean and tightly closed. Water, dirt or petroleum-based fluids entering the system can affect braking and damage components.

• Use the DOT category specified in the manual
• Do not add engine oil or other fluids
• Inspect and replace at the manufacturer's intervals

Have an abnormal pedal checked immediately

If the pedal suddenly feels soft, its travel changes, a brake warning appears or fluid leaks, do not just top up and keep driving. Have a technician inspect the system immediately.