What are the consequences of driving 20 kilometers without engine oil?

[Thalia]

When a car continues to drive without engine oil, the lubrication effect becomes very poor. In severe cases, the lack of lubrication can cause the engine to seize. The less oil there is, the more severe the consequences will be. When the engine is started again, dry or semi-dry friction may occur between the cylinder and piston, accelerating the wear of parts and significantly increasing the resistance during startup, making it difficult to start. Functions of engine oil: Lubrication: The primary function of engine oil is to provide proper lubrication to the engine's pistons, bearings, and other components; Sealing: During the "power" stroke of the engine, it prevents high-temperature and high-pressure gases in the combustion chamber from leaking into the crankcase through the gap between the piston and cylinder. Symptoms of a car without engine oil: The oil light on the dashboard will illuminate. Therefore, when the oil light comes on, engine oil should be added immediately; Elevated water temperature and valve noise; There may also be knocking sounds in the engine.