Where the funk is this located on a 2002 F150 Screw? Any Pics?

How often should I change it?

Is this easy enough for a newbie to replace? (I do my own oil)

 

Don't know about your about your Screw but on my 97 xlt and my 01 L, it is located inside of the left frame rail--in the driver's door area. It's not 'hard' to do but it is exasperating! You have to get the proper fuel-connector removal tool. I got mine at Pep Boys but Snapon has the best. Change it every 15,000 miles.

When you get near 15,000, run a search and see the helpful hints.

Dan