What Happens When a Car Runs Out of Engine Oil?

[LeEthan]

Running out of engine oil can lead to the following symptoms: 1. The lubrication effect deteriorates significantly. In severe cases, the lack of lubrication can cause engine seizure, and the consequences worsen as the oil level decreases. 2. When the engine is restarted, dry or semi-dry friction occurs between the cylinders and pistons, accelerating component wear. The increased resistance also makes starting the engine more difficult. Here are the functions of engine oil: 1. Reduces wear: There is rapid relative sliding between pistons and cylinders, as well as between crankshafts and bearings. Engine oil prevents excessive wear of these components. 2. Cools the engine: Engine oil assists the radiator in cooling the engine by dissipating heat. 3. Seals and prevents leaks: Engine oil forms a sealing ring between piston rings and pistons, reducing gas leakage and preventing contaminants from entering. 4. Dampens vibrations: When pressure in the engine cylinder rises sharply, the load on pistons, piston rings, connecting rods, and crankshaft bearings increases suddenly. The lubricated bearings help cushion the impact load.