What is the difference between Motul 600 and 660?

Compared to Motul’s RBF660 brake fluid, RBF600 has a lower dry boiling point and a slightly higher wet boiling point. It also has marginally better longevity, needing to be flushed at about the same frequency as RBF660, if not at slightly longer intervals.

Can you mix Motul 660 600?

They are both DOT-4 fluids, and from the same manufacturer, so they should be safe to mix. Obviously to get the full benefit of the 660’s higher dry boiling temp’ you should do a full flush and bleed. 1 of 1 found this helpful.

Who makes the best brake fluid?

Our pick for the best brake fluid is the Motul Dot-4 100 Percent Synthetic Racing Brake Fluid. While it’s slightly pricier than other brands, it improves pedal feel, protects against water penetration, and increases performance for both daily drivers and racers.

What is Dot 5 used for?

DOT5 is a silicone-based fluid that was developed for use where moisture or water was almost certain to be a factor in the braking system, such as military applications. While DOT5 has a higher boiling point (500F dry/356F wet) than DOT3 or DOT4, DOT5 exhibits more compressibility than glycol ether brake fluid.

Is it OK to mix brake fluids?

Since DOT 4 and 5.1 are both glycol-based brake fluids they are compatible with each other, which means they can be readily mixed without harming your brake system. By mixing DOT 3, 4 and 5.1 brake fluids, assuming it is fresh fluid, the worst thing that can happen is a drop in the boiling point of the whole fluid.

Is synthetic brake fluid better?

Some very high-end synthetic DOT 4 and 5.1 synthetic fluids can give a better pedal. Some silicone-based fluids can provide a softer pedal because it is more compressible than glycol-based fluids. But, some high-tech silicone ester-based stuff that some race teams use is less compressible than glycol-based fluids.