Periodic replacement of brake oil is necessary to ensure the safety of the vehicle. The use of brake oil is to convey the force imposed by the driver on the brake pedals to the subpumps on each wheel and to drive the brake blades to generate power to slow the vehicle down. Although its rationale is simple, there are also requirements and characteristics in its use. Because the brake system works on friction, friction in the brake system makes the brakes hotter at short notice, the temperature is higher at continuous working, and normally the brake blades can reach 500 to 600 degrees, and the temperature passing to the brake oil will not be low. The brake oil is therefore required to be of a certain temperature-resistant nature, and it is also required to have a good flow characteristic in order to be able to deliver power well. In order to meet the requirements and characteristics of brake oil, which at this stage is subject to production processes and manufacturing costs, brake oil may have a number of characteristics that can also be understood as insurmountable shortcomings. The following information is provided: there are different formulations for different brands of brake oil, and it is impossible to determine what kind of chemical reaction would occur if different brake oils were added, with a longer period of time likely to corrosive the interior of the brake system. The solution to the problem would be more complex, with high safety risks for self-use and headaches for repairers;2 and brake oil would also be very humid, absorbing water from the air and, while the brake system was very secure, it could not be completely isolated from the outside world. The high temperature of the brake system produces gasification of the moisture in the brake oil at 100 degrees, which, if overdone, seriously affects the brake effect. Periodic replacement of brake oil is therefore required to avoid this. The brake oil would not normally be missing, but would need to be replaced periodically, as recommended in the vehicle usage instructions. If there is a hint of too little brake oil on the instrument, there are usually two scenarios: the brake blade is too thin or the brake system is leaking. In both cases, a professional overhaul must be conducted at the 4s store or repair plant at the first time。
