DOT brake fluid is required to meet strict standards and specifications set out by the Society of Automotive Engineers and the Department of Transportation (DOT) - hence the name. Eurol Brake Fluid DOT 5 Silicone helps to prevent corrosion and provides excellent lubrication to rubber seals and metals. The product has a broad temperature range (-55°C up to +260°C) and ensures optimum performance at low temperatures and a low toxicity. DOT 5 Silicone Brake Fluid can be used safely in hydraulic brake and clutch systems on (race) motorcycles and karts provided they have seals that are resistant to a silicon brake fluid.

EBC Brakes Racing would like to emphasise that we put as much effort into development of our rotor metallurgy as what we put into development of our pad friction materials. This means that there are no wet or dry boiling temperatures to worry about, the boiling point stays constant and never drops. Made in the USA and used exclusively by the US military in their light vehicles, silicone brake fluid conforms to the US DOT5 standard.

As Tiger said, DOT-4 fluid does need frequent changes to make sure moisture buildup in the fluid does not cause problems. I use DOT 4 in road cars and AP600 competition fluid in rally cars to avoid the fluid boiling, which DOT 4 can and does do under extreme conditions. For example, to avoid introducing bubbles you can pour the fluid into the MC reservoir by letting it run down the shaft of a clean screwdriver rather than pouring directly. Thanks to this, Automec silicone brake fluid lasts the lifetime of your vehicle, never needing to be changed. Have no reason to believe this won't be as good only time will tell but purchased as Putoline is a known reputable manufacturer.

Unlike DOT brake fluid, Mineral Oil brake fluids are not governed by any standards or regulatory body, therefore the technical information on the various substances that contribute to their make-up is usually hard to come by.Care should be taken to use the correct type of brake fluid as recommended by the manufacturer of the system. The pad and rotor combined form the friction coupling; if either component is of poor quality then the outcome will likely be poor overall system performance. The Dry Boiling Point of brake fluid refers to the boiling temperature of fresh, new brake fluid from an unopened container.

Brake Fluid is 100% synthetic on polyglycol basis for all types of hydraulic actuated brake and clutch systems in accordance with DOT 5. This graph is taken from Shell and gives an overview of the declining effect water content has on its range of DOT 3 and DOT 4 brake fluids. glycol-based) with DOT 5 which is silicone-based and should never be mixed with any other DOT fluid.Now the brake fluid can no longer transfer these forces to the caliper leading to brake failure - this is known as 'fluid fade'. Recommended for use in the hydraulic brake and clutch systems of all cars, commercial vehicles and motorcycles for which non-petroleum based fluid is specified.

From that picture it's clear to see that DOT fluid is used by the vast majority of hydraulic brake manufacturers on the bike scene, however does that necessarily mean it's the best choice for users? Let's remember that the Department of Transportation specify the minimum wet boiling point of DOT brake fluids after absorbing only 3. Tech tip: If you want to use DOT 5 may be easier to decide if it's right for you with some added knowledge about this type of brake fluid. Classic Spares is part of Murray Scott-Nelson, Classic Sports Car Specialists, based in Scarborough, North Yorkshire. has a significantly higher boiling point than standard DOT 3 and DOT 4 fluids and is therefore well suited to modern high performance vehicles and/or vehicles fitted with ESP/ASR systems.Brake fluid manufacturers can and often do improve on these figures and it is possible to find DOT 4 brake fluid with a higher boiling point than some DOT 5. When I inquired about "why", in both cases I was told it had to do with the lubricity of the DOT-5 fluid preventing the seals from operating as they do with DOT-3 and -4. I used DOT 5 in several high mileage cars, after a full brake system overhaul, replacing all seals, hoses (Goodridge, cheaper than OEM in some cases) and pipes (Kunifer of course, NEVER copper), and they went on to achieve very high mileages, up to 200k, without further attention to the brakes, except routine pad, and occasionally disc, changes. Since there is no hydraulic mountain bike brakes using DOT 5 fluid we won't worry too much about it.