What happens if you overfill oil in a car?

If you overfill oil in a car, it can cause serious damage to the engine. The extra oil can get into the combustion chamber and cause the pistons to become stuck, leading to a seized engine. Additionally, the extra oil can cause the crankshaft to become unbalanced, leading to vibration and other issues. It is important to always check the oil level and not overfill it.