I have not lost noticeable oil but I found a small oil leak in the front of car. Any of you guru mechanic have any ideal

 

I don´t have 5.0 litre V8, but many V8 owners on this forum have had oil leak on vacuum pump on front of the engine. Vacuum pump are on your 2nd picture round thing right at the center.
If you search with "Vacuum pump" you might find more details.

 

+1 I would agree from the pictures given. Do a more in depth check from under hood. Have seen the upper front covers leak before also.