What Stage is a Vehicle Engine at 150,000 Kilometers Mileage?

[SanLillian]

A vehicle engine with 150,000 kilometers mileage is in the natural wear stage. The stages of an engine can be divided into the following three conditions: 1. Running-in wear stage of a new engine (or overhauled engine): During this period, due to the initial flatness of newly matched mechanical surfaces, the wear on the mating surfaces is relatively rapid, commonly referred to as running-in wear. 2. Natural wear stage: After the running-in period, the wear rate of components slows down, the wear amount becomes more stable, and it maintains a uniform increase over a long period. This phase is known as the normal working period, and the wear during this time is termed natural wear. 3. Catastrophic wear stage: Once the natural wear of components reaches the wear limit point, due to increased clearances, the oil film can no longer be maintained, lubrication conditions deteriorate, impacts begin to occur, and wear accelerates sharply. The components quickly lose their working capability until failure. This period is referred to as the repair interval or repair period of the mating parts, also known as the catastrophic wear stage.