Purpose and Specifications

MOTUL RBF 660 Factory Line is a top-tier DOT 4 racing brake fluid built for high-performance braking in cars with carbon, ceramic, or steel disc brakes. This 100% synthetic fluid handles extreme heat without fading, keeping your pedal firm and brakes responsive during track days, spirited street driving, or daily use in performance vehicles.

• Dry boiling point: 325°C (617°F) - Resists brake fade under heavy, repeated stops
• Wet boiling point: 204°C (399°F) - Stays effective even after absorbing moisture over time
• Volume: 0.5 liters - Perfect for a full brake system flush
• Exceeds DOT 3, DOT 4, and DOT 5.1 standards for superior safety and performance

It works in all hydraulic brake and clutch systems needing non-silicone synthetic fluid, reducing vapor lock and maintaining consistent stopping power.

When to Use / Replace?

Use MOTUL RBF 660 when pushing your brakes hard - think track sessions, autocross, or canyon carving where standard fluids boil and fail. Replace every 12 months or 10,000 km of hard driving to avoid moisture buildup that drops performance. Shelf life is 3-5 years unopened in a cool, dry place.

Pro Tip: Flush completely when switching from other fluids to get maximum heat resistance from day one.

FAQ

Is MOTUL RBF 660 safe for daily driver street cars?
Yes, it's versatile for street and track, but best for performance driving where heat builds up fast.

What's the difference from regular DOT 4 fluid?
Higher boiling points mean no fade during aggressive braking - regular DOT 4 boils around 230°C dry, this hits 325°C.

How often should I change it?
Every year or 10,000 km for track/street use to keep it fresh and moisture-free.