'83 F350 flatbed dump (10,000 lb. GVWR) w/C-6 gets 4-6 around town and short trips; 8-10 on longer trips. Doesn't seem to make a whole lot of difference empty or 1 ton load. Don't know what it would do loaded to the max.
Piffery1

 

With a few carb problems, my 1986 F250 4x4, 460, C6, 3.55, in town I'm getting around 9-10, on the highway, around 65 and the tires way low(around 25 psi) I got just over 11, but I havent been on the highway since i filled the tires.

 

i've got a q-jet on the 460 C-6 in my 76. i get about 11 mpg if i baby it and stay on the primarys. i've also got a 97 F-350 with a 460 (EFI of course) it gets 11 mpg if i baby it too.

 

If I wanted good gas mileage, I wouldn't own my 460-powered 1997 F350 crew cab. I live in snow country, I have a family of five...it is all about being safe on the road. Several years ago, we learned of a tragedy: Members of a family riding in the camper on a standard cab truck were lost when the camper rolled out of the bed on a twisty mountain highway. I will never allow passengers to travel unless they are buckled inside the cabin with me. I also invested in the best tie-down system I could find, adjustable turnbuckles linking chains to all four courners of the pickup bed. Never load a rig beyond its safe capacity. Plan your trip. Don't be stupid and pass when it isn't safe.
8 to 15 mpg is normal for this engine. I am getting 12-18mpg because I keep it tuned and use high octane fuel.

 

i see you did a 2ws to a 4wd conversion. i have a 76 f350 that i want to turn into a 4x4. can you give me any advise on that? my email is jerryk@annettholdings.com

 

79 F350 + 44's x 5.13s = 6mpg (but very fun to drive )

 

1983 F-350 standard cab dual exhaust 8-9 MPG... Doesn't matter if I'm towing up hill with the ac blowing or going downhill solo with the wind at my back.....

 

89 350 C-6 and US Gear under drive unit and 3.55 rear end. 10-13 running light @ 70, 13-15 @ 60, 10.5 from Ocean Park WA to Chicago with 27 foot Prowler and 1200 lbs of tools @ 60. Bone stock but kept tuned up.

 

i see you converted your truck to a 4 x 4. i have a 76 f350 crewcab i want to do the same to. can you give me any tips of what to do and what not to do? was it tough? i would like to put the nv4500 5sp in it mated to a 460. also any ideas on the transfer case? i know i am going to have to have 2 driveshafts custom made for the application but looking for insight.

 

Sorry that I am late, but I just joined.

I have a 35' Class "A" motorhome and it weighs in at just under the 18340# GVW when loaded for camping. I have a 460 EFI with a C6 and 5.12:1 gears and 8R 19.5 tires. I can tow a 10000# trailer with this unit.

I get 6.5 to 7.5 MPG with the coach alone and driving 55 -60 MPH. I have gotten over 8.0 at one time.
I get 5.5 to 6.0 MPG towing 7500# trailer with motorcycles in it.

"Doc"

 

14.89mpg was my best ever, '88 F-250 4x4, ZF-5 speed, 3.55's, 33" tires

 

I don't pass to many gas stations with my 95 7.5L supercab 4x4 w/5-gear but on a recent trip from Calgary to Vancouver my tanks gave me 14-17.5 mpg depending on altitude (there were some damn long climbs but I managed to pass everyone else) and weather (I hit a blizzard, a white out, and one 45 min. road closure for avalanche control). I found that the harder (meaning faster) I pushed it, the better the return. On the last stretch of the trip I was right behind a newer S.D. diesel and I managed the 17.5 mpg doing 70-90 mph. This has happened before on previous trips as well. I'm not feeding you guys a line of B.S.- I ran the numbers 3 times (I'm one of those Carpenters who measures twice....).I've got 4.10 gears run a 285-16 all-season, and my only mods have been the K.N. filter and venturi tubes. I am planning on a better exhaust and chip (Tex likes his Superchip any feedback from guys running any of the other brands would be welcome.)- I'm not to bothered about losing a couple of mpg as I'll be pulling the 21' travel trailer we bought last year and I need some more power, I hate dropping a gear or two on inclines. That or frederic could send me his twin-turbo when it's ready-I'll even drive down to get it.

 

1994 f350 4x4 dually with a 11x7 dump, 5spd, i average 10. regardless of how i drive.
i bought this truck out of a texas auction, and have replaced all sensors on the engine. chopped the exhaust and added a flowmaster. streamlined the airflow in and out!
Everyone may want to check out this link:
http://pesn.com/2005/03/17/6900069_Acetone/
possibly gain better mpg.

LowRange

GotToGoFord

 

My '95 F250 4x4 w/460, E4OD and 265/75-16s (E load rated at 50psi) usually gets me 7.5 mpg in town, which is where I do most of my driving. I got 12 last time I got it out for a trip down the highway, but I've changed the exhuast from bone stock to Thorley tri y headers and a Flowmaster cat back (70 series) since then. I haven't taken it on any road trips lately since we usually take the Taurus when we go out of town.

 

9 mpg average, mostly city driving.

'83 F250 4x4 reg cab
8,600lb GVWR
4.10 gears
C6
285/75R16 tires
97,500 miles
stock engine
2.5" downpipes from cast iron exh manifolds, 4" single exhaust
Magnaflow 12771 muffler