Definitely do the fuel filter, I did mine yesterday and drove about 60 miles today just to test it out (who says its a waste
) I went from fighting tooth and nail to get 14.5 (I'm talking like 85% highway here) to about 17mpg with about 65/35 (highway and city respectively). I realize its a small data pool with only about 60 miles, but still, its gotta count for something with that kind of difference.
In short, fuel filter = godsend. Also it only cost me 21.65 or something along those lines from Summit (through Amazon).
I don't know how your winters are there, but road crews around here treat salt like its grass seed when it comes time for winter, so my fuel filter removal and installation was a bit more work than it should have been. Bolts locked solid with rust, one of the fittings solid rust, finally get bolts out after much PBBlaster soaking, they look more like nails, all threads are gone on both them and the holes in which they belong, etc etc and so forth. Long story short, it took me about 3-4 hours but that includes trying to clean up the rust having to find a bolt that would fit the now enlarged holes and fiddling with those fittings for 20-25 minutes a piece. Totally worth it IMO though, at least so far for me it's been great.
99' WJ, 2.5" Rusty's, Bilstein 5100's, JKS TrackBar, Moog SuperTrailBoss
"With enough fabbing, time & $, it's certainly possible.
That being said, it's like boinkin' your sister...just because you can, doesn't mean you should." - Double E