Motul RBF 660 DOT4/5 Racing Brake Fluid

Racing fluid with very high wet and dry boiling points

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  • Dry Boiling Point = 325° C (617° F)
  • Wet Boiling Point = 204° C (400° F)
  • DOT4 (exceeds DOT5 specs)
  • Normal viscosity
  • 500mL bottle
Motul Racing Brake Fluid is a superior fluid to other off-the-shelf performance and racing brake fluids. The RBF660 has boiling points that exceed DOT4 standards. It has been specifically designed to resist the high temperatures generated from steel or carbon racing brakes and clutch systems. High boiling points help to avoid vapor lock caused by fluid boiling. Motul RBF 660 far exceeds DOT 3 and DOT 4 standards, and the container is filled with nitrogen in order to increase shelf life and eliminate contamination as long as the factory seal remains in place. As with any brake fluid, its quality is only as good as its freshness. That's why it's important to change your brake fluid often, especially with regular track use.

Normal or Low Viscosity? For the track it's always Normal Viscosity brake fluid. This is because Low viscosity fluids will be too thin once exposed to typical track temperatures. For regular road and street use, however, you should use whichever fluid came from the factory. The cutoff between Normal and Low is not by model year. If your chassis existed before 2004 it uses Normal viscosity (all chassis up to E53). But if the chassis was introduced after 2003 it will use Low viscosity fluid (all new chassis starting with E60). The lone exception is the E53 X5 which could take either: 1999-2003 X5 uses Normal; 2004-2006 X5 uses Low.

If you have any questions on which brake fluid to use on your BMW, give one of our experts a call at 877-639-9648.

BMW Fitments:

F22 / F23 (2014+) > M235i-Racing
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