The three most common causes of oil leaks are:
1. Worn or damaged seals and gaskets: Over time, seals and gaskets can become worn out or damaged, allowing oil to seep through the gaps. This is often the case with older vehicles.
2. Cracks in the engine block or oil pan: If there are any cracks in the engine block or oil pan, oil will leak through them. This can be caused by accidents, wear and tear, or overheating.
3. Loose drain plug: The drain plug is what keeps oil from draining out of the engine when it's not in use. If it becomes loose, oil will leak out. This is usually an easy fix; just tighten the plug back up!