The 2015 has the stock tires on it. My 2005 I did not recalibrate the speedo.

 

I'm getting 17.5 city, 20-22 highway, depending on how fast I drive, and how much loaded down I am. I am really impressed with how good the mileage is loaded down

I have a 2015 5.0 supercrew 157" wheelbase 4x2 3.31 rear end

 

I will say, I didn't start getting my best mpg's on my 13 till after 15,000 miles..

Having never driven a 5.0 or a 2015 F150, I don't know how those rigs run, so could be totally off base with this.

But, it does seem to me that you should be getting better than that.. Unless that's your average mpg's based on towing something 3 times a week?

I get 10 mpg's towing my #5000 TT... It really screws up my total mpg figures!

Mitch

 

my 15 5.0L Supercrew 6.5ft bed 3.73 gears 4x4 gets 17 flat doing 80 mph down the highway (i have a mildly heavy foot) and im getting 15.5-16 mpg in the city. my truck is completly stock, i have only added a tool box and headache rack to it which is 130lbs between the two

 

Maybe mine isn't all that off then. I definitely have a heavy foot and had some weight in truck. With the add ons maybe I'm not as far off as I think. I will lighten up the foot on the next trip and see what happens!!

 

weight makes a huge difference. i was doing some work for the railroad and had long 200-300 mile trips to the job site. i had my old truck 09 dodge 5.7 hemi and with 700-800 lbs of parts tools and diesel in the bed i would loss 2.5-3 mpg with the cruse set at 75

 

It does seem a little on the low side. My 13 EB has a life time average of 17.3 over 52k miles. Since Thursday I have put over 1200 miles and the average is 18.6. That's In the mountains of Colorado, climbing pikes peak etc. Right now its showing 20.6 with almost 300 miles on the tank.

 

That does make a difference, I noticed almost a full mpg. I do a lot more coasting and easier acceleration. I ran a tank of premium and there is a slight difference in mpg's for me but it's not worth the extra $10 or $15. So depends on the route in which you drive, lots of hills etc... Good luck!

 

Today I had to run a bunch of errands so I decided to drive a little easier and watch the fuel economy gauge. I reset it and for the last few hours of city driving I'm getting around 18mpg. I'm not driving miss daisy but I'm going easy on the gas!! I think the fact that I have a little bit of a heavy foot and the added weight ect is why the mpg dropped so much. If anyone is trying to be fuel conscious I would recommend putting the fuel economy graph up on the dash display, reset it, and watch how it goes up and down as you drive! It might be a little bit of a wake up like it is for me! I think, for me, another issue is that 5.0 sounds SO GOOD when you are accelerating that you just kind of stay on it a little! Haha

 

I have a '15 FX4 Platinum with 5.0, 3.55 gears...i get 15 city and 17-18 highway. 19 was the best so far if i keep it under 2k rpms.

 

Turn it onto the "live MPG" display and watch how quick it drops with the go pedal.
Use cruise control as much as you can
Coast to a turn or stop light, it's much easier on the truck overall

Here's my 2014 5.0 2wd 3.31

[Red is hand calculated][pink is cluster display]

The big downward spikes is heavy towing
Upward trends are exclusively highway trips

 

I've found that the cruise control works great for mpg on relatively level ground, but in hilly areas where I do lots of driving I can do better without it. Cruise can't look ahead and anticipate what is coming and adjust accordingly.

 

I've also noticed that as long as you keep steady pressure (lower than floored) on the vertical pedal and don't worry about keeping a steady speed your economy goes up at least in my area where we have small hills. I normally don't get more than 5-10 mph above the speed limit, but do fall to about 10 below the limit. When I drive in this manner I typically see 2-3 mpg improvement. It just really irritates the people behind you.

 

Irritate? Yes it does!

 

Of course, cruise control isnt about fuel economy. In hilly / mountanous terrain, its always better to drive with it off, for nothing more than to keep the transmission from shifting 50,000 times an hour. Especially on these 6 speeds. My 2005 with the 4 speed auto I would let the truck slow down and lug a little just to hold gear rather than it race and shift to keep speed