Why is not recommended to overfill the engine with oil?

Overfilling an engine with oil can lead to excessive pressure, causing seals and gaskets to fail, which may result in leaks. It can also lead to foaming, where the oil becomes aerated and loses its lubricating properties, potentially damaging engine components. Additionally, too much oil can interfere with the operation of the crankshaft, leading to decreased performance and possible engine damage.