Fuel rail firewall side leaking gas?

[zukitrek]

Good day Fix. When taking pictures of the tranny I noticed that the underside of the EGR valve was stained with like a dark red color.

   
I then check from above it and it looks like the end of the fuel rail (firewall side) is leaking very faintly but it is.

   

As far as I'm concerned there are no performance issues, other than from a long time Ive noticed that fuel doesn't last that much, but then again O2 sensor and the electrical tune-up (wire, plugs and rotor) has not been done and all that is city driving under very hot climate? Actually this must have started after dealing with the EGR issue because I remember that the white mesh cover of the thermoprobe was not stained and now it is.
What could the problem be?

Thanks in advance

J