Recommended for use in all cars, commercial vehicles and motorcycles which require a DOT 3 or DOT 4 fluid.

There's good news and bad news when it comes to its water-absorbing properties, that is why you'll find I have entered it in both tables to show both sides of the story.This means that the likes of Shimano and Magura have the added freedom when it comes to its manufacture. Let's take a look at the minimum boiling temperatures of DOT brake fluid as specified by the regulatory bodies.

Magura Royal Blood Mineral Oil has a ridiculously low boiling temperature when compared with its rivals in the industry. If you are worried about brake temperature, and the risk of sudden failure caused by boiling fluid, upgrade to DOT 5. As water enters the system, instead of pooling in low spots (such as the caliper), due to its weight in comparison with brake fluid, it is dispersed throughout the whole of the brake fluid. Part of the standards that need to be met by the manufacturers of DOT fluids are the minimum dry and wet boiling points. Silicone Brake Fluid is recommended for re-fill or top-up of brake and clutch systems in all vehicles and equipment that specify a DOT 5 Silicone fluid.As Tiger said, DOT-4 fluid does need frequent changes to make sure moisture buildup in the fluid does not cause problems.

It is suitable for use in racing cars and motorcycles for competition applications as it resists the formation of vapours that can cause a loss in braking performance. The brake fluid also has to resist, as far as possible, the high temperatures created by the braking forces.Without it, or without enough if it, the forces you apply at the brake lever would not be transferred to the caliper, pads and rotor. This makes it easy to identify and saves you from making the fatal mistake of introducing the wrong fluid and destroying your brake's internal seals. Fluid manufacturers can and do improve on these temperatures with some brake fluids reaching dry boiling temperatures well in excess of 300°C/572°F.