What are some possible causes of an oil leak in your car?

Some causes of vehicle oil leaks are worn or improperly installed oil filters, broken oil pan seals and loose timing cover seals. A drain plug with worn threads can also cause oil leaks. Another common cause of oil leaks is a cracked, degraded or loose valve or oil pan gasket.

Loose bolts in the drain pan and can allow oil to slip out, causing leaks. A broken or missing oil filler cap can also lead to leaks. Physical damage to the bottom of the oil pan is another common culprit; rough roads, rocks, animals and branches can cause holes or cracks in the pan.