WOL Motul Factory Line RBF 660 DOT 4 Racing Brake Fluid 500ml

High-performance DOT 4 brake fluid for demanding use

High-performance polyglycol brake fluid with an extremely high dry boiling point for hard use, supplied in a 500ml container.

The WOL Motul Factory Line RBF 660 is a 500ml polyglycol brake fluid designed for high-performance braking systems. It is described as going well beyond standard DOT 4 requirements, with an extremely high dry boiling point to help during hard use.

The listing gives a dry boiling point of 617°F and a wet boiling point of 399°F. It also notes improved recovery time, which is the sort of detail that matters when braking is being worked hard and repeatedly.

Key points to check before use

• Meets FMVSS 116 DOT 4 and SAE J1703 / J1704 standards.
• Drain interval should follow the vehicle manufacturer’s recommendation and your own use.
• Do not mix with silicone brake fluids.
• The listing also advises avoiding mixing with lower performance polyglycol-based brake fluids.

For anyone maintaining a performance car, track car, or another vehicle that needs a DOT 4 brake fluid with a stronger heat margin, this is the sort of product to compare carefully against the vehicle handbook and the existing fluid already in the system.