Oil beside the black air filter box

[Ford Guy]

Hey all.
Noticed a small amount of oil stain on top of the left side part of the air filter box where the left tube that runs to the air box is. Anyone notice this?
Hopefully I'm explaining this properly lol.
I will try to take a picture if needed.
First I thought it might be drips from the rust proof spray (under the hood) but it's just in that one little area. Could this be a PCV valve issue?

 

[Keiths2kgt]

Do you have a catch can installed?

 

[Ford Guy]

Do you have a catch can installed?

Yes, JLT.

 

[Keiths2kgt]

Is it like a mist stain? I have to tighten my jlt crazy tight or I have oil mist on the left side. Maybe a pic would help if you can upload one or two.