What happens if you overfill the engine oil?

Never Do This! What Happens if Your Engine Oil Level is Too High? Engine oil is crucial for keeping all the moving parts of an internal combustion engine running smoothly. It reduces friction and helps prevent the engine from overheating. The oil system in an engine operates in a closed loop. However, if the oil level is too high, it can increase the internal oil pressure. This excess pressure can strain seals and gaskets, leading to leaks. But that's not all! When there's too much oil, it can cause the crankshaft to whip the oil into a frothy mixture, allowing it to enter the cylinders. This can lead to oil seeping into the combustion chamber. When oil burns in the combustion chamber, it can foul the spark plugs and cause the engine to burn oil, resulting in a smoky exhaust. It can also damage the catalytic converter and significantly reduce engine performance. In the worst-case scenario, excessive oil can lead to severe engine damage and costly repairs.