About DOT 3 and DOT 4 Brake Fluid
Synthetic brake fluid for compatible systems requiring the listed DOT 3 or DOT 4 performance specifications. Identify the hydraulic system and the specified fluid before ordering. Fluid type, service procedure, and contamination control are central to a successful replacement.
Before you choose
Match the exact system specification. Brake fluid and power-steering fluid are not interchangeable, and a DOT number alone does not authorize every substitution.
How do I confirm the correct fluid?
Use the vehicle’s service information and reservoir markings, then compare AMSOIL’s current application data. Follow the manufacturer’s filling, bleeding, and replacement procedure.
Product information reviewed September 7, 2026. Read AMSOIL’s current details.
