Brake Fluids
 
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Brake Fluids

Brake fluid for a BMW is either Normal or Low Viscosity and should be rated as either DOT4, DOT5, or DOT5.1. Unless the car is driven on the track, Low Viscosity fluid is used on any BMW model with DSC (Dynamic Stability Control), which is almost all BMWs since 2003. Any track use or any cars not equipped with DSC use the Normal Viscosity fluid, which is thicker. All DOT5.1 fluid is Low Viscosity but some DOT4 fluids may be as well.

The DOT ratings refer to the fluid's dry and wet boiling temps. Dry is fresh from the bottle and wet is fluid that has absorbed moisture after one year. The higher boiling points earn a higher DOT rating. However, DOT5 is associated with silicone-based fluid while DOT5.1 is reserved for Low Viscosity glycol-based fluid. A Normal Viscosity fluid that meets DOT5 boiling points is labeled as "DOT4/5" or "Super DOT4". DOT3 fluid can be used in a pinch but its lower boiling points make it inferior to DOT4/5.

Glycol-based fluid, (DOT3, DOT4, DOT5.1) should be flushed/changed every 1–2 years under non-racing conditions and much more frequently for track or racing use.
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Ate Typ 200 DOT 4 Normal Viscosity Brake Fluid, 1 Liter

High-performance and racing brake fluid. Normal viscosity. 388°F wet boiling point.

Price: $11.49

18.50
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Performance Friction RH665 Super DOT 4 Normal Viscosity Racing Brake Fluid, 1 Liter

High-performance and racing brake fluid. Normal viscosity. 363°F wet boiling point.

Price: $29.99

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Red Line RL-600 Super DOT 4 Normal Viscosity Racing Brake Fluid, 16 ounce

High-performance and racing brake fluid. Normal viscosity. 400°F wet boiling point.

Price: $16.95

20.95
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Motul RBF 660 Super DOT 4 Normal Viscosity Racing Brake Fluid, 0.5 Liter

High-performance and racing brake fluid. Normal viscosity. 400°F wet boiling point.

Price: $31.99

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Motul RBF 600 Super DOT 4 Normal Viscosity Racing Brake Fluid, 0.5 Liter

High-performance and racing brake fluid. Normal viscosity. 401°F wet boiling point.

Price: $17.99

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Castrol SRF Super DOT 4 Normal Viscosity Racing Brake Fluid, 1 Liter

Silicone-based racing brake fluid. Normal viscosity. 518°F wet boiling point.

Price: $74.99

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Genuine BMW DOT 4 Low Viscosity Brake Fluid, 355ml

Original OEM brake fluid. Low viscosity. 347°F wet boiling point.

Price: $4.75

4.98
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Ate SL.6 DOT 4 Low Viscosity Brake Fluid, 1 Liter

High-performance brake fluid. Low viscosity. 347°F wet boiling point.

Price: $11.20

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Pentosin DOT 4 Low Viscosity Brake Fluid, 1 Liter

OEM brake fluid. Low viscosity. 338°F wet boiling point.

Price: $17.99

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Pentosin DOT 4 Low Viscosity Brake Fluid, 5 Liter

OEM brake fluid. Low viscosity. 338°F wet boiling point.

Price: $53.99

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Pentosin Super DOT 4 Normal Viscosity Racing Brake Fluid, 1 Liter

OEM brake fluid. Normal viscosity. 329°F wet boiling point.

Price: $13.99

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Pentosin Super Super DOT 4 Normal Viscosity Racing Brake Fluid, 500mL

OEM brake fluid. Normal viscosity. 329°F wet boiling point.

Price: $9.99

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Pentosin Super DOT 4 Normal Viscosity Racing Brake Fluid, 5 Liter

OEM brake fluid. Normal viscosity. 329°F wet boiling point.

Price: $48.99

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Pentosin DOT 4 Low Viscosity Brake Fluid, 250mL

OEM brake fluid. Low viscosity. 338°F wet boiling point.

Price: $6.99

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Pentosin Super DOT 4 Normal Viscosity Racing Brake Fluid, 250mL

OEM brake fluid. Normal viscosity. 329°F wet boiling point.

Price: $6.99

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Motul DOT 5.1 DOT 4 Low Viscosity Brake Fluid, 0.5 Liter

High-performance brake fluid. Low viscosity. 365°F wet boiling point.

Price: $10.99

12.22
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