How long can an engine run without oil?

[SebastianLee]

If a car idles without oil, it can run for a maximum of half an hour. If driven on the road, it can only last for 15-20 minutes. The functions of engine oil and its replacement intervals are introduced as follows. Functions of engine oil: Engine oil is crucial for the engine. It not only lubricates but also cleans, seals, cushions, prevents rust, and dissipates heat. When the engine is running, the oil forms a protective film on the surfaces of various components, preventing direct contact and friction between them. Engine oil needs regular replacement: Over time, the performance of engine oil degrades, so it must be replaced periodically. The recommended replacement interval is between 5,000 to 10,000 kilometers or every six months to a year. Failing to replace the oil in time will accelerate engine wear.