I recently bought an 04 llariat crew cab with a 5.4 the truck had 107000 miles on it the previous owner installed a leveling kit and 295/75/18s. I'm only getting 12.6 mpg according to my dash read out. I know big tires hurt your mileage but I wouldn't think that much or am I just dreaming? What is the average mpg with normal tires and stock suspension?
Thanks for the help

 

the wife's 07 F150 gets about 16.5 mpg on the highway, 14ish in town, and around 19mpg if she is drafting me in the Excursion! lol no joke! But 16-17 is what we average with it. It's a 5.4 with stock everything, supercab.

-The Great

 

12.6 is about what im getting...... only because I have exhaust intake and programmer and cant keep my foot out of it haha. My truck will go in moods like yesterday got 21 mpg on the highway at 67mph behind a semi and the day before I was only getting 16 doing the exact same thing and thats on 305/55/20. These trucks require a light foot and greatly benefit from aftermarket add ons. Plus im running leveling kit

 

I just filled up today and was averaging 12.9 mpg. That's hand calculated, 25.5 gallons 330 miles. Seems to be consistent for me. I have some add ons as we'll.

 

I'm consistently getting below 12 mpg. I do drive it highway to work and then a ton of stop and go, off and on driving. I hand calculate about once every couple months and it's also around 11.6, 11.7. My truck is a 07 supercab, fx4, 5.4 with 3.73, stock. I did put bfg rugged terrain e rated tires which I think made the mileage a little worse.

 

I just got 201 miles too 11 gallons hand calculated 18.2. Im running 275/70/18 load range E 10 ply tires (33) leveling kit spectre cai cat back straight pipe php gryphon programmer and its always on 3 that's where ive discovered my best fuel economy. I would have gotten better fuel but stop and go traffic in indy. Thats driving pretty graciously and behind semis. Now whenever ive had enough and take off and start doing 80 then yea my mileage drops to 13. I also have the 5.4 and the 3.73

 

Get a tuner the tires throw off the computer, your probably getting around 15mpg highway like me and i got 275's but im fullsize 4 door 4x4 with a lead foot. I get around 11-12 in town. Mine used to top out at 14mpg until i did the tuner and i've seen a max of 16.5

 

My 05 FX4 supercab got 16.0 when i was driving mostly highway. now that I do a lot more city driving and have the front leveled i usually get around 14-14.5 on stock size tires.

 

I have a 2005 Lariat stock wheels and tires. K&N cai. Evo programmer. Getting about 16-17 ave. mpg. Love the programmer since it shows instant mpg. That way i might be able to figure out what is going on. In pouring rain it drops 2 mpg-s. Very interesting.
Cruise controlling it helps.

 

I'm bone stock and 90K on the clock in my FX4. I get around 14.5 around town and low 16-ish freeway, hand-calculated which is a little worse than my 6.4 even with all of the DPF emissions crap on it. I think I topped out at 17.5mpg once coming down hill, gas station-to-gas station from Las Vegas. Just to note, I admit I'm starting to drive like an old man, (not just cuz I'm getting there, LOL) since it starts getting real thristy with hard take-offs from stops and cruising above 65mph

One thing for sure is I lost about 1-1.5mpgs consistently after I got a new set of Michelin AT/LT2 tires to replace the factory BFG's that came with the truck. I now have about 30K miles on them, and it hasn't improved as they start wearing down. The Michelins were touted to be 'efficient'....definitely not from what I see!