I would like to survey the user as to their actual milage with the superduties.

Please include model, cab configuration, 4x2 or 4x4, transmision, axel ratio, after market products(e.g. K&N filter ect..)

 

99 F350XL 4x4 Reg Cab LWB 5.4L auto K&N filter, 8'fisher snow plow. 10.5mpg average.

 

00' F250 SC LWB V10 5SPD 3.73 Average mpg with mixed city and highway, 11.8. Best mpg was 13.1. Can't seem to get the 15 mpg my buddy swears he gets, no matter how I drive.

 

'99 CrewCab w/ long Bed, 5.4L, auto w/3.73, 4X2. Average 13.5 city, 15.8 highway. No after-market items installed yet.

 

'99 F350 SD CC 6 1/2 ft bed, 5.4L, 3.73, 4X4, no after market stuff.
14 MPG mostly HWY driving.

 

Y2K F250 XLT SC, 4x2, 5.4L, 5sp, 4.10LS.
Mixed driving city/highway is averaging right at 15mpg. Just highway is probably a bit higher (maybe 16).

I'm starting to think the auto tranny hurts some folks MPG more than I expected. It makes sense sortof, its a way heavy duty tranny but it's taking some power..

 

99 F-250 regular cab 6.8 l V-10, auto, 3.73.

Best Hyw mileage = 14.6 mpg
Avg Hyw mileage = about 14

Avg city mileage = 9.5 mpg (heavy right foot)

no mods to this truck.

99 PSD F-250 Super Cab long bed, auto, 3.73

Mixed hyw and city only 16.5 to 17.5 mpg.
Lariat overhead mpg meter seems to read about 1 mpg high always.

 

1999 superduty crewcab long bed 4x2 v10 4:30 rearend automatic. 13,000 miles.

Got 10 mpg mixed driving from day 1.
put in k&n filter at 10,000 miles and still
got 10 mpg.
Used 87 octane until I read that you could increase power and mileage with 93 octane and after three tanks I still get 10 mpg.
The best ever was on the highway at 65 mph, I got
12.5 mpg.
I'm easy on the gas too, I attribute the constant 10 mpg to the 4:30 rearend. I should have gotten the 3:73 as I have nothing earth shattering to tow
and the V10 has plenty of power to tow with a 3:73.


I bought a 77 lincoln with a 400 cid (61000 miles)
and guess what I get? 10 mpg.

Since I got the lincoln I have let the SD sit in the drive and it gets 10 mpg standing still.
Maybe my neighbor has been stealing my gas.

 

My '00 SD CC V-10 XLT 4x4 automatic with 4.30 gears and no aftermarket stuff gets 10-11 mpg. Mixed city/highway, all 2wd, no towing, about 10 mph over the speed limit (that's 75 out here in CA).

 

I have checked every vehicle I have ever owed once a week for mileage. With the truck I have checked it both by the trip computer and by pencil and paper (which comes out the same). best tank F250 SD Lariat, shortbed, V10, automatic 4:30 rearend gets 15.7 best highway (only driven highway empty once when less than a thousand miles on it), a steady 14 mpg average every day combined driving, worst tank 9.8 mpg pulling a 3 horse gooseneck horse trailer with living quarters, and average about 12 mpg in all pulling conditions. Sure does beat my old 460 5 speed's 6-12 mpg.

 

99 S/C, PSD, Auto, 2wd, shortbed w/ 3:73 rearend.
I average 17-18 mpg empty with a very light foot on flat (florida) land and 11-13 mpg towing my 6500 lb. fifth wheel. Truck has 9200 miles and no problems yet.

 

99 F-350 XLT sc/lb 4.30's V-10, loaded, 11mpg ave.

 

1999 F250 CC SHORT BED V-10 3.73LS REAREND LARIAT

Best gas mileage was 18.5 mpg with cruise set at
55 mph on country roads empty.
best gas mileage on highway @ 65-70 mph 16.5 mpg
avg on highway 16 mpg
avg city 10.5 mpg

 

I've noticed that the angle the truck is sitting when your filling the tank can make a difference of several gallons.
The margin of error evens itself out when you average several tanks worth of fuel vs miles.

So, if you get an unusually high/low mpg figure for a particular tank, thats likely what happened..

I'm sure sure this is the case for the guy who got 18.5 mpg with his V10. Thats extremely unlikely.

 

00 F-350 Lariat, Crewcab,longbed, 4x4, V-10, auto, 3.73LS , ESOF, plowframe, heavy suspension, toolbox, mudflaps. Around town, 12 , Highway, 13-14, towing camper 9-10. Note,it is very noticable that the mileage has gone down with the colder weather. My 99 got the same mileage figures.