Brake oil, also known as brake fluid, is an important factor affecting the quality of the vehicle brake system performance. Under normal circumstances, the general brake fluid replacement cycle is two years, despite the brake fluid using a long time, though not much impact on the surface, but when the vehicle in an emergency braking or driving downhill when the long-term, the problem is likely to emerge. Especially when accidents result in inferior quality of brake fluid has occurred, we all know that depend on the delivery pressure of the brake fluid to achieve brake function, and therefore it has to heat, but also resistance to low temperature. Mandatory national standards, not lower than the boiling point of the brake fluid 205 ℃, freezing must reach -40 ℃. However, the market brand-name products use cheap methanol as raw materials, production of brake fluid watered by far less than the boiling point of the national standard. If you are using substandard or what the general quality of brake fluid can cause corrosion of metallic brake system, brake cups each cylinder of softening, rupture, can easily lead to brake failure, a serious threat to the lives and safety of consumers. How do we distinguish the merits of the quality of automotive brake fluids it? Automotive supplies buy Network [Department] pointed out to us with a pass, to identify the authenticity of the merits of brake fluid three most important indicators are: boiling point, low temperature fluidity and corrosion, according to three indicators, we can so discern brakes Oil advantages and disadvantages: (1) low temperature fluidity is very good, which is particularly evident for cold regions. Use high-quality brake fluid as sensitive and reliable at the time of the cold. The use of inferior brake fluid temperature performance is poor, high freezing point, there will be lower than 20 ℃ temperature solidification occurs, greatly affect driving safety. (2) various metal rust, good brake system. Usually corrosive brake fluid, brake fluid but greatly reduce quality of all kinds of metal corrosion rust resistance, prolong the life of the brake pump, if the addition of inferior brake fluid will quickly corrode metal, cause harm to road . (3) for a variety of rubber does not corrode. Quality brake fluid after use rare severe swelling deformation of the cup. If the use of poor quality brake fluid, cups easily expanded and deformed, causing the vehicle oil spills, when the brakes flip, causing the accident. Standard brake fluid in the expansion coefficient is generally 0.1% to 5%. (4) having a boiling point higher the better, the lower evaporation. Boiling point of not lower than 205 ℃, when the vehicle is traveling a long time, at high or downhill driving, the temperature as high as the number of Baidu. Brake fluid temperature as brake shoes, with rising temperature, if the brake fluid boiling point high enough to brake fluid vaporization, bubbles, weak brakes, the brakes can not immediately reach the goal, we can not guarantee traffic safety. (5) Long-term use of non-precipitate. Brake fluid long-term use at high temperatures, the thermal decomposition of unstable quality will have to produce a precipitate, also affects braking performance. So in the choice of brake fluid must be selected quality, best buy brand products, such as: Bosch BOSCH, Mobil Mobil, Castrol Castrol, Ferodo Ferodo, TOTAL Total, BASF BASF and China Great Wall brand of brake fluid, the system Force, Lake, Valeo, J-WORKS, Wuerth, car servant, etc., so quality and security, is also at ease with, not in order to save a little money and big money.