Brake Fluid Comparisons
|
DOT 4 Min Standard |
Torque RT700™ |
Halo P1 by Orthene |
Castrol SRF |
Endless RF-650 |
Motul RBF600* |
Motul RBF660* |
Dry Boiling Point (°F) |
446 °F |
683 °F |
640 °F |
590 °F |
613 °F |
594 °F |
617 °F |
Dry Boiling Point (°F) |
685 °F |
646 °F |
616 °F |
616 °F |
570 °F |
588 °F |
|
Wet Boiling Point (°F) |
311 °F |
439 °F |
392 °F |
517 °F |
424 °F |
420 °F |
400 °F |
Wet Boiling Point (°F) |
438 °F |
403 °F |
536 °F |
412 °F |
398 °F |
400 °F |
|
High Temperature Stability |
±5.4 + 1 ° that original BP exceeds 437 °F |
-1 °F |
N/A |
-3.5 °F |
-3.5 °F |
-7.2 °F |
-3.5 °F |
Chemical Stability |
±5.4 + 1 ° that original BP exceeds 437 °F |
-1.23 °F |
N/A |
-3.6 °F |
-3 °F |
-2 °F |
-3 °F |
Vapor Pressure |
<0.01 mmHg @ 68 °F |
N/A |
N/A |
N/A |
N/A |
N/A |
|
Density (Specific Gravity) |
1.095 |
N/A |
1.058 |
N/A |
|
N/A |
|
pH |
7.0 - 11.5 |
7.3 |
6.6 |
9.1 |
5.7 |
7.1 |
6.8 |
Viscosity -40 °F (cSt) |
1800 max |
1501 |
1400 |
1202 |
2543 |
1660 |
1434 |
Viscosity 212 °F (cSt) |
1.5 min |
2.1 |
2.63 |
3.5 |
3.5 |
2.7 |
2.7 |
Compressibility |
No standard |
5.19E-05 @ 212 °F @ 5800 psi (400 bar) |
N/A |
6.487E-05 @ 212 °F @ 5800 psi (400 bar) |
5.868E-05 @ 212 °F @ 5800 psi (400 bar) |
N/A |
N/A |
(Numerically lower numbers denote lessor compressibility) |
3.969E-05 @ 122 °F @ 5800 psi (400 bar) |
N/A |
5.230E-05 @ 122 °F @ 5800 psi (400 bar) |
4.884E-05 @ 122 °F @ 5800 psi (400 bar) |
N/A |
N/A |
|
|
3.405E-05 @ 68 °F @ 5800 psi (400 bar) |
N/A |
4.621E-05 @ 68 °F @ 5800 psi (400 bar) |
4.846E-05 @ 68 °F @ 5800 psi (400 bar) |
N/A |
N/A |
|
Reserve Alkalinity |
No standard |
84 |
N/A |
10 |
5 |
33 |
36 |
% H2O Content at Testing |
No standard |
0.01 |
N/A |
0.01 |
0.15 |
0.19 |
0.22 |
Red indicates where the brake fluid did not meet the SAE J1704 and/or FMVSS 116 requirements.
Yellow indicates where brake fluid did not meet the manufacturer's performance claims.
*While we have only listed Motul RBF600, RBF660 and a few others, the performance characteristics are applicable to a large number of other brands of fluids as they all come from mostly one manufacturer.
**When extreme boiling point values are unavailable from other brake fluids, their ERBP or known standard boiling point value that is publicized will be used.
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