I say don't add anything. Change your oil and filter and use good oil and you'll be fine. If Ford wanted Lucas in it they'd specify that in your owners manual, which they've never done. Just my .02. The 5.4 is a ticky motor no matter what and if it ain't tickin away and it's quiet something's wrong.
Flush the crankcase with a double oil change, then feed it some 5w40 T6 with some Liquimoly Ceratec on a fresh Motorcraft filter... then get back to me about your ticking.
If you still hearing it, give it a read with Torque over Bluetooth OBD and/or talk to your doctor about Tinnitus.