[Charlierfc]

Hi all, I have noticed some oil laying on the top of the engine but I have no idea where it is coming from! It's mostly laying on the plastic large hose to the left of the engine when your standing in front of the car. I took this plastic hose off and searched under it for any obvious leaks. Can't find anything. I even put my hand over one side of the plastic hose and blew into it to see if leaking...nothing!

Any ideas? Was thinking maybe was coming from filler cap but don't see any signs of leaks from it.