2000 XLT 4x4 5.4 245k Poorly maintained, mobil 1 5w-30 about maybe every 10-12k, had it since 2011.
Air filter might have been changed once, plugs were recently done near 193k when we got it so same ones.
2 coils replaced with used as they started to misfire.
MAF never cleaned since we've had it, alternator replaced when it failed and one side upper control arm cause I didn't want ball joint to pop out and damage car/tire etc.
Nothing else done since nothing else failed yet...yep one of those.
Hey it was a super clean body and paint 2000.00 daily driver for wife.
Pulled the awd fuse so transfer case is disengaged and it makes it smoother and less drag and no feeling of release engage up slight hills...but it's clunkier than most..probably.
Did notice slight increase in MPG when I pulled fuse.
11-12.5 around town, 15-16.8 highway.
It gets better than my pristine 03 Navigator with 32V 5.4 and 118 on it, that just had throttle body cleaned, MAF cleaned, new air filter, new plugs and coils.