What are the causes of engine oil leakage?

[SanSimon]

Engine oil leakage is caused by: 1. Damage to the engine cylinder gasket, oil pan gasket, or sealing rings; 2. Damage to the front and rear crankshaft oil seals or camshaft oil seals; 3. Loose fastening screws. An engine is a machine that converts other forms of energy into mechanical energy. The first external combustion engine was invented by R. Stirling of Scotland, UK, and later improved by Watt into a steam engine. Engines can refer to both power-generating devices and the entire machine including the power unit (such as gasoline engines and aircraft engines). Types of engines include internal combustion engines (such as gasoline engines), external combustion engines (such as Stirling engines and steam engines), gas turbines (used in racing cars), and electric motors.