Where oil leak may be ?

Hello, This may be a valve cover, but to be sure you can use a UV dye and UV flashlight to watch the leak happen. Wash the engine of oil, follow the instructions on the UV dye kit from most auto parts stores, and you will KNOW where the oil is coming from.

Are you positive it's engine oil that's leaking out? .. Since the drive belt is slinging this substance, it is very possible it's a coolant leak instead!

Major oil leak passenger side Pontiac g6 breaking alternator belt