GATORB8

06 5.4 4x4

Between 12.5-14 mpg city or interstate (~80)

Long stretches of flat highway going 55 I can get close to 19.

Ryan Greer

I have an 06 lariat screw 5.4 4x4 with an edge evo cs and with mostly city driving I averge 12.2. I really don't drive hard either. I keep the edge on level 1 (trans only) with 91 fuel. These trucks drink gas. But that's to be expected when u drive a friggin battle ship.

foolwitools

Wow!,,, In town ( dead stock ) I usually get 13+

BJV269SS

I'm averaging 15 mpg. About 19+ highway

PJB

Low to mid 14's lately with my XLT. In the summer I was getting 15.

The best Ive gotten was 15.8. Most of my driving is highway.

Ryan Greer

Unless my Driver Information Center is lieing to me. When I get out on the freeway, I usually average 17-18.

fordever11

I have 38' tires, Im screwed either way, but cold air intake helped, tire pressure and running better fuel are simple ways to increase milige, if you want to get serious, replace plugs and injectors. 5.4 plugs are VERY hard to do, so if your not mechanically inclined, take it to certified ford mechanic.

pcs

i got 17.5mpg last week on a 170mile one way trip to phoenix with my sport bike on the back.
5.4 fx4 100k
k and n filter only

foolwitools

............are the numbers you guys are listing from your programers or "real" numbers calculated when you fill-up?

60DRB

'06, 4.6L, S-Cab w/6.5' bed, 4x4, auto xmsn, no mods. City=15, highway=18+. Of course, I pay for my own rear tires and my youthful days of taunting Johnny Law are behind me!