What happens if there is too much engine oil?

[MacBenjamin]

Excessive engine oil can negatively impact the engine. In severe cases, it may damage the three-way catalytic converter, cause engine oil leaks, reduce engine power, create unnecessary resistance to crankshaft rotation, and consequently affect power output while increasing fuel consumption. When there is too much oil in the engine, the movement of the crankshaft and connecting rod ends will violently agitate the oil during operation. This not only increases the rotational resistance of the crankshaft and internal power loss but also leads to more oil splashing onto the cylinder walls, easily resulting in oil burning and discharge. When adding oil, there is a marked scale—generally, keeping the oil level between the minimum and maximum marks on the dipstick is sufficient.