What are the effects of not changing engine oil?

[StJeremiah]

Here are the impacts of not changing the engine oil in a car: 1. The primary function of engine oil is lubrication. If it is not changed for a long time, the oil will become ineffective and deteriorate, which will increase the wear and tear on the engine. In severe cases, it can lead to engine cylinder scuffing. 2. Engine oil also has a cleaning function. If the oil is compromised, it cannot effectively remove impurities generated on the surfaces of the components. Over time, this will affect heat dissipation and lubrication, and in severe cases, it can clog the oil passages, leading to engine damage or even complete failure. 3. The cooling effect of the engine oil will diminish, adversely affecting certain car components, especially those with relatively fragile structures. Over time, these parts are prone to damage or even complete burnout.