An oil sump pan, or oil pan, is located at the bottom of an internal combustion engine and serves as a reservoir for engine oil. Its key functions include: 1. **Oil Reservoir**: Holds engine oil to lubricate moving parts, reducing friction and wear. 2. **Cooling**: Helps cool the engine as circulating oil absorbs and releases heat. 3. **Oil Collection**: Collects oil draining from the engine for recirculation by the oil pump. 4. **Sealing**: Sealed to the engine block with a gasket to prevent leaks. 5. **Drain Plug**: Equipped with a drain plug for oil changes. Made from materials like steel or aluminum, the oil sump pan's design varies by vehicle. Regular maintenance is crucial for preventing leaks and ensuring proper oil levels.