My mileage was 22 hiway when I got the car in 2008 (98k miles). It gradually went down until it hit 12 mpg (110k miles), when overfueling and coolant did a job on my cats, etc, which were new in 2012. Then I did the head gaskets, injectors (re-hab'd) and had the cats removed (no testing in my county), along with a laundry list of items that made sense while I was in that deep.
If the injectors haven't been touched, I would rip them out and send them to
Witch Hunters in Duvall WA to have them tested, cleaned and flowed. I had to go thru 8 before I had 6 that were good to go. The ones I took out were overdue to be replaced. I might have a couple decent spares if you need any.
If the O2 sensors are old, I'd replace them. FORD/MotorCraft brand, be careful of fakes...packaging is usually the give away.
Plugs and wires, of course. AutoLite APP 5144 and your choice of wires, no need to go exotic, but if you have the budget, Magnecor, otherwise, Motorcraft...shop warranty.
Mobil 1 synthetic, High Mileage (
not 'Extended'), 5w-30, K&N HP2009 filter; air and fuel filter brand your choice. New MotorCraft 16# non-lever radiator cap.
I'd have it smoke tested for vacuum/boost leaks.
Tires with as much tread as possible, air pressure at max, I like 36 psi for my Anny. 38 is ok.
Finally, I nice cloak of ceramic wax/coating/detailer so she cuts the wind and looks great doing so.