hey guys i was wondering if any of yall had any reasons for poor fuel mileage im only getting like 12.5. i have a 1994 f-250 4wd 7.3 IDIT 134,500 miles new tranny....i bought this truck about 3 weeks ago....i thought that i would be getting better mileage than 12.5 any clues? please let me know....i have installed a k&n drop it air filter 1 week ago so the air filter is good and also added some Diesel kleen to the fuel to clean the injectors.

 

Is that city or highway driving? I have a '93 4x4 Crew Cab Long Bed 7.3 IDI with a Garrett Turbo and I get about 11-13 on a normal day (winter though too), In the sumer I ususally get 13-15 city and the best I've had is 19 highway. These diesels are better than gas engines, but it's still a 7000 lbs truck and you cant really expect good fuel mileage. If its highway you might have a bad injector or somethin, but if its town, thats about what mine is gettin.

 

i do mostly highway driving like 60-70 miles round trip at 65-70mph. and the title said it only weighed like 5500lbs not saying anything bad about you or nothing also i got the stock turbo on it as well anything else you wanna know just let me know thanks
-michael

 

Mine gets 10 mostly city. Around 13 highway. 12.5 aint bad.
What rear gears do u have.
Also if u have a muffler it could be stopped up.

 

rear gears i have no clue.....dunno if you can tell by this but when im doing 65 im at 2200rpms.....yes the muffler is still on but i plan on taking it off and putting on 5 or 6 inch stacks

 

yeah, my bad. my truck is 5800 lol. only 1200 lbs off. Do you have large tires or anything? I have the stock tire size and no lift. I only get 9-11 if I drive like I normally do, but I have a new engine too and it's not broken in, so no pedal to the metal fro now. But yeah, get your exhaust system checked out or look at it yourself too. I had an '02 escape that got 11 in town and I had a bad cat. converter and my mileage dropped to 9 mpg.

 

you can look on the inside of the driver side door and it should tell you what gears you've got in the rear. it sounds like you have 3.55 gears?

ive got the same truck with about the same milage and i average 15-17mpg. I think you should be getting at the least 14-15mpg.

how much does it smoke under heavy acceleration?

 

my truck or his truck? lol. IF ur talkin to me, my truck barely smokes at all. I'll put the pedal on the floor and there's a little (very little) black smoke for 1 or 2 seconds, but I think that's pretty normal.

 

oh, haha, sorry i didnt specify who i was talking to.

no i was talking to peterbuilt. lol

 

nevermind on my last post. But anyway, you're running 2200 at 65? i usually go 60-65 and I'm at 1600-1800 rpm's (depending on acceleration), I have 3.55's

 

oh, so my sticker lied. lol

im not surprised, the truck was in a accident while towing a goose neck trailer before i bought it so alot of crap was changed out and fixed.

sooo, im running 4.15s?

 

4.10 gears with E4OD at 2200 RPM should be going 70 MPH if it has 235/85-16 tires on it.
Same truck, same tires with 3.55 gears would turn 1900 RPM at 70 MPH.

So if your reading are much different, speedo error would add a couple MPG.
When the fuel goes from winter fuel to summer fuel, you will gain a MPG or two also.

Diesel 4x4 truck under 7000 pounds, I find that hard to believe.
Two wheel drive, a bit over 6000 I would go for.
Mine is right at 8000 pounds on certified scales full of fuel and me not in it.
Yes mine is a bit heavier with the dump flatbed, but not that much heavier.

8800 GVW - 3/4 ton (1500 Lbs) = 7100 empty weight

 

I dunno, my truck weighed out at 5800 lbs. But i'm accusing the scrap yard of bein liers.

 

it has 4:10 gears
my 89 e4od 4:10,s runs 2500 rpm at 70 mph and about 2200-2300 at 65 mph

 

nearly forgot i get 12.5 mpg