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Is Brake Fluid the Same as Brake Oil?

1 Answers

JadeRose

07/30/25 2:45am

Brake fluid is the commonly referred to brake oil, a liquid medium used in hydraulic braking systems to transmit braking pressure, employed in a vehicle's hydraulic braking system. Introduction to Brake Fluid: Brake fluid is a highly concentrated liquid with strong water absorption capabilities. After a period of use, its water content gradually increases. Brake fluid should be replaced every 2 years or every 40,000 kilometers driven. Alternatively, professional instruments can be used to measure the water content of the brake fluid. If it exceeds 5%, it should be replaced as soon as possible; otherwise, it may affect driving safety. Precautions for Brake Fluid Replacement: During the brake fluid replacement process, if air enters the oil pipe, the brakes may feel softer after replacement, potentially leading to delayed braking or even brake failure. The brake fluid can be replaced using the complete drainage method: open the brake caliper's bleed valve, start the engine, and repeatedly press the brake pedal until no more fluid comes out of the bleed valve, then tighten it. Refill the reservoir with new fluid, repeatedly press the brake pedal until firmness is felt, then loosen the caliper bleed valve to drain the fluid. Once the pedal lowers, quickly tighten the valve. Repeat this process twice until no air bubbles emerge from the fluid. Be sure to check the fluid level in the reservoir, ensuring it does not drop below the minimum mark.

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