MOTUL RBF 660 Racing Brake Fluid – 500 ML


The MOTUL RBF 660 Brake Fluid – 500 ML has a very high dry boiling point of 617F (325C) and a wet boiling point of 400F (204C). Specially designed to resist extreme temperature generated by racing brakes (carbon and ceramic) only allowing a minimal air entrance for brake cooling.

SKU 83724 Categories , Tag


MOTUL RBF 660 Racing Brake Fluid Details

Test Unit DOT 3 DOT 4 DOT 5.1 RBF 660
Dry boiling point °C >205 >230 >260 325 (617°F)
Wet boiling point °C >140 >155 >180 205 (401°F)
Viscosity at – 40°C (- 40°F) mm2/s <1500 <1800 <900 1698
Viscosity at 100°C (212 °F) mm2/s >1.5 2.59
pH 7-11.5 7.15
Effect on rubber SBR (Styrene -butadiene)
Volume change at 70°C (70 hours) mm 0.15-1.4 0.76
Softening (IRHD) 10 max 4
Disintegration no no
Volume change at 120°C (70 hours) mm 0.15-1.4 1.05
Softening (IRHD) 15 max 7
Disintegration no no
Loss at 100°C weight % 80% max 50
Fluidity and appearance at low temperature
Appearance at -40°C No freezing OK
Bubble time s 10 max OK
Appearance at -50°C No freezing OK
Bubble time s 35 max OK
Water tolerance
Appearance at -40°C clear OK
Flow time s 10 max OK
Appearance at +60°C clear OK
Sedimentation % 0.15 max OK
Anti-corrosion properties: Weight variation
Tinned iron mg/cm2 0.2 max 0.03
Steel mg/cm2 0.2 max 0.01
Aluminium mg/cm2 0.1 max 0.02
Cast iron mg/cm2 0.2 max 0.1
Brass mg/cm2 0.4 max -0.04
Copper mg/cm2 0.4 max -0.05
Additional information
OEM Approval

FMVSS 116 DOT 4, SAE J1703




E30, E36, E36/7 / E36/8 Z3, E39, E46, E60 / E61, E85 / E86 Z4, E90 E91 E92 E93


Z3 M, Z4 M, M3, M5

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