what kind of mpgs can i expect

[forcerecon0]

hi i have owned several diesel trucks cummins ,duramax,6.0 powerstrokes but this is my first 7.3.its a 00 f250 ext cab long box 373 gears 120000 miles. my ? is i live michigan and i am going to haul a car to ga for a buddy of mine.i trying figure out how muck fuel i am going to use.car trailer and a 87 monte ss down there and just the trailer on the way back its about 800 miles one way.thanks

[Big Calo]

Standard or auto?

I have a 99 and pulling a 20 lowboy gooseneck empty got 14.3 mpg, pulling that loaded about 6k-7k back got about 11.5. That was completly stock and with a standard 3.73 gears. 70 mph

depends on tranny, mods, driving habits.

[forcerecon0]

Stock everything auto trans

[Big Calo]

Dont know about the auto trans. Maybe someone will chime in that knows.

[Hank]

I get 14 or so normally and would expect to get 10-11 pulling a car/trailer. Will know for sure in a month or so. Supposed to haul a friends jag 250 miles.

[jesilvas]

with us pullin a 8k lb fifth wheel i figured it to about 8 or so. 10 in the higher altitudes? but i've got the 4.10 rear end
guess i should say too that i get about 14-16 depending on if i'm doin 60 or 70. 70 getting 14

[stetson]

I have a 2000 powerstroke f250 I purchased stock in 2004 I was surprised because my
98 F150 got 14.8 mpg mixed driving. F250 14-15mpg depending how I drive.I added a Cap and
a chip and I now get between 13 -17.5 mpg . This truck at almost 4 tons is almost as
fast as my old sport cars off the line. Mine is an auto.At my age that't what I want when
I was growing up my sports car was 71 formula 400,400 big block, 4 barrel carburetor, Pontiac Fire bird HP ON the floor,bucket seats. This car needed high test fuel and it could
do nothing special but go fast !

71 Formula 400 hp = Cop magnet

[stetson]

One other thing, the truck is an auto I am glad of that as I done my share of shiftiting.
I am told by others that have had this transmission as long as you service it as it should
be it will last.I have had ne problems.Change fluid every 30k.

[Dave]

OP expect 13-14 on that trip if not accelarating hard constantly

[mjkten]

I have had my 03 for about 9 months. It has 3.73 rear end and the auto transmission. Normal daily driving was about 15-16 mpg. That is mostly country roads, not a lot of stop and go. I took my boat to Miami this summer, a 23 foot center console, about 650 miles one way. The boat weighs about 6-6.5K pounds and is pretty tall in the wind. At 70-75 mph, I got around 9-10 mpg. After I got home, I decided to run a couple of tanks of fuel trying to get my best economy, keeping the tach below 2000 rpm, and my first tank was a measured 17.59 mpg. So if you keep your foot out of it, you can do pretty well. My sons truck with a tuner, gets about 19 mpg unloaded and 13mpg towing that same boat. YMMV:-)