My 95 450 PSD got at best 12mpg my 03 F-450 6.0 13mpg my 89 450 IDI 12mpg.

 

Here's the mpg for my last few fill ups. I have a 2003 7.3 super cab 4x4 all stock, 3.73's. I just picked up a bunch of stone this past weekend, empty weight was 7040 lbs - no people or tools in it, and about 20-22 gallons of fuel.

<TABLE style="WIDTH: 63pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=84 border=0 x:str><COLGROUP><COL style="WIDTH: 63pt; mso-width-source: userset; mso-width-alt: 3072" width=84><TBODY><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext 1pt solid; WIDTH: 63pt; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" width=84 height=16 x:num="14.323144104803495">14.32</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="13.619047619047619">13.62</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="13.775100401606426">13.78</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="14.095744680851062">14.10</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="13.87323943661972">13.87</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num>14.00</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="14.074074074074074">14.07</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="14.550561797752808">14.55</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="13.868613138686133">13.87</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="16.042553191489361">16.04</TD></TR><TR style="HEIGHT: 12pt" height=16><TD class=xl22 style="BORDER-RIGHT: windowtext 1pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 1pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12pt; BACKGROUND-COLOR: #ccffcc" height=16 x:num="13.578431372549021">13.58</TD></TR></TBODY></TABLE>

 

My data: haven't updated the spreadsheet in past couple of weeks, but I have the data.

Side Note about Additive column:
DKW = Diesel Kleen, white bottle
DKG = Diesel Kleen, gray bottle

Hope this helps
.

 

17-21mpg consistently unloaded. 21mpg pure highway, 17 mixed.

94 F350 ext cab dually 5 speed 4.10 gears, virtually bone stock

 

wow you must have a real easy foot! i get around 10-13 city, and 16-19 highway, i just gotta hear those stacks at each stop sign and light

 

Whats up neighbor, 1999 F-250 CC 7.3
12. winter
12.3 now
City driving
15-16mpg running 75 at 75mph
21-23mpg at 55 to 60 in the UP

 

I get about 14.5 mpg with city driving and about 18.5 highway. 1999.5 stock except for a muffler delete pipe and the 6637 filter mod.

 

I use to get the 14.5, but lost it, and have not figured out why yet.....Thought it was the diesel fuel required sulfer chage that did it to me. But maybe not.

 

Is anyone running a chip on their 7.3? If so, has it made a difference in your fuel economy?

 

See sig. for mods. with the bigger tires and mostly hwy driving I avg. about 17-18 mpg. If I am stuck around town in city driving I avg 14-15. If I hook up the camper I am down around 12mpg.
As with all mileage debates tire condition, inflation,weight of right foot,headwinds,inclines,elevation,ETC... all contribute factors to how far you will go on a tank of fuel.

 

i think most ppl on here us a chip on there 7.3. the first thing i bought for my truck was a chip so the mileage i gave was with a chip!

 

i usually average 19, but have got as good as 23 feather footing and probably had a little wind advantage. got 6 the other day pullin 25,000 lbs worth of tractor and flatbed

 

17.5 mixed driving, 20 at 57 mph highway

'02 7.3 crew cab auto

 

Where I live is flat.
I changed the fron and rear diff's to 3.55 since I didn't tow cattle.
This 7.3 was mated to a manual transmission
I recorded 22 mpg overall on two tanks of fuel!
Driving empty.
great enjoyment in shifting the diesel except in in stop and go traffic.
talk about a scootin' machine.

 

18 mpg on the highway at 68, 16 much past 74 or so

94 IDI turbo x-cab 2wd 3.73 w/ E4OD bone stock