Is it okay not to change brake fluid for ten years?
3 Answers
It is not advisable to go without changing brake fluid for ten years, as this can cause the brake fluid to become turbid, lower its boiling point, reduce effectiveness, and may eventually lead to brake failure. The brake fluid system undergoes wear during use, and the brake fluid absorbs moisture from the air, leading to oxidation and deterioration. Therefore, it is necessary to replace the brake fluid in a timely manner to ensure driving safety. For ordinary household cars, it is recommended to change the brake fluid every two years. Brake fluid, also known as hydraulic brake fluid, is made from refined diesel fractions with thickeners and antioxidants. There are three types: mineral oil brake fluid, alcohol-based brake fluid, and synthetic brake fluid. The primary function of brake fluid is to act as a transmission medium in the automotive braking system.
Actually, it's quite risky not to change the brake fluid for ten years. I once drove an old car whose previous owner hadn't changed the brake fluid for a decade, and the brakes felt spongy—stepping on them was like pressing on something with no strength, almost causing a rear-end collision. Brake fluid absorbs moisture, and when it contains too much water, its boiling point drops. During emergency braking, the fluid can boil and create bubbles, leading to brake failure. Over time, it can also corrode the brake lines, causing leaks or damage to the master cylinder. I recommend checking the moisture content every two to three years using a dedicated test pen. If the level is high, replace it immediately. Regular maintenance of this small detail can prevent major accidents, especially on highways or downhill sections where reliable braking is crucial.
Not changing brake fluid for ten years is absolutely unsafe, and I believe no one is willing to risk brake failure. Brake fluid with high water content is prone to failure in high temperatures or rainy weather, leading to skidding or rear-end collisions. When inspecting brakes, I prioritize checking the fluid condition—if it appears cloudy or dark, it's time for a replacement. Modern car braking systems are complex, relying on hydraulic pressure transmission, and fluid degradation affects overall performance. Don’t overlook this small detail in daily maintenance; saving money or effort isn’t worth risking lives. During annual maintenance, have a technician quickly test the moisture and boiling point parameters. A simple replacement isn’t costly but ensures safe travels.
