What are the reasons for shock absorber oil leakage after prolonged use?

[McWyatt]

Shock absorber oil leakage after prolonged use is primarily caused by the degradation of the oil seal's sealing performance. The working principle of a shock absorber is as follows: when relative motion occurs between the vehicle frame or body and the axle due to vibrations, the piston inside the shock absorber moves up and down. The oil inside the shock absorber chamber repeatedly flows from one chamber to another through various orifices. The friction between the orifice walls and the oil, as well as the internal friction among oil molecules, creates a damping force that converts the vehicle's vibration energy into thermal energy of the oil, which is then absorbed and dissipated into the air by the shock absorber. Signs of shock absorber damage include: 1. Unusual noises from the shock absorber when driving on bumpy roads; 2. Visible oil leakage on the exterior of the shock absorber; 3. Excessive body bouncing and instability when driving on uneven surfaces; 4. High temperatures on the shock absorber casing after driving.