Here's why:
* Increased Crankcase Pressure: Excess oil fills the crankcase, leaving less space for air to escape. This can build up pressure, forcing oil past seals and into other engine components.
* Oil Foaming: High crankcase pressure can cause oil to foam, reducing its lubricating properties. Foaming can also lead to oil leaks.
* Oil Consumption: Excessive oil can lead to increased oil consumption as it gets burned in the combustion chamber.
* Damage to Seals: High oil levels can put stress on engine seals, potentially leading to leaks.
* Reduced Engine Performance: Oil in the combustion chamber can cause misfires, reduced power, and even engine damage.
How to Avoid Overfilling:
* Always check your oil level with the engine at operating temperature. A cold engine will have a higher oil level reading than a hot one.
* Use the dipstick to check the oil level. Make sure the dipstick is clean and inserted all the way before checking.
* Add oil slowly. It's better to add a little at a time and check the level again.
* Don't overfill. The oil level should be between the "full" and "low" marks on the dipstick.
Important Note: If you've already overfilled your engine with oil, it's crucial to address the issue as soon as possible. Consult a mechanic for assistance in draining the excess oil.