I haven’t changed the brake fluid in 12 years. Doesn’t the brake fluid need to be changed at all?

replaceBrake FluidAs a part of the maintenance program, of course, it makes sense. But some netizens said that their car has not changed the brake fluid for 12 years, the brake system is still intact, and the braking effect will not have any bad influence, so changing the brake fluid is a gimmick in the automotive industry. So is it true that the brake fluid does not need to be changed at all?

First of all, let's not say that it has been so long for 12 years. Even if the brake fluid is not replaced for 6 years, it has already caused a bad effect. Because when a car is braking, water vapor (very little) will definitely be generated due to the effect of high temperature, and the brake fluid is a high-concentration liquid and has a strong adsorption capacity for water. In such a long time of 12 years, the water content It must have exceeded the limit, which will have a very bad effect on the braking system.

The effect of excessive water content in brake fluid:

1. Because the brake fluid has too much water, it will cause the brake cylinder to rust for a long time.

2. Secondly, it affects the wet boiling point of the brake fluid, which causes the brake fluid to not maintain a very stable performance, so it may not be able to brake during continuous braking.

3. The dry boiling point of the brake fluid also has a certain effect, and it is easy to cause the phenomenon of air lock, which leads to a decrease in the braking effect, and even feels that the car cannot be braked.

Therefore, the brake fluid must be replaced regularly. After all, this is related to driving safety. Do not change the brake fluid without changing the brake fluid after 12 years.

As for the replacement cycle of brake oil, it is generally 2 years or once every 40,000 kilometers, but the specific time has to be specified in the user manual. Of course, we can also directly check the water content of the brake fluid. First, prepare a brake fluid water content tester, and then insert it directly into the filler port of the brake fluid. If the water content exceeds 3%, it is recommended to replace it at a later time. If it exceeds 5%, it must be replaced as soon as possible.

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