Hi!

Looks like I have an oil leak...I don't really see it in the front of the engine. But I do see it on the lower side in the back of the engine. The top of the engine doesn't leak but I see oil residue in the picture below.
What do you think is the cause of the leak and how can it be fixed? Car only has 25,000 miles so surprised there is an oil leak already. I guess to fix this engine would need to be lifted out of the engine block. Seem like it's a lower valve cover leak?

Thanks for any help with this!