Worst that I've gotten was 14.5 with my 92, was leaking more fuel than it was burning and my speedo still bounces if I go over 70. Apparently holding it at the governor for over an hour in od messes with the PSOM, and yes I know I'm an idiot.
Worst mpg thread
- Thread starter wmoguy
- Start date
My worst was 10 going up to cedar city but that was because a powerstroke went flying by so I caught up to him and we werecruising my speedo was at D
It's all uphill from Vegas to Cedar City, that must have been fun.
anytime my F450 carrier had a tall open structure load on the deck, the mileage would immediately head south of 10mpg.
pennsylvaniabo
Full Access Member
8.5mpg grossing 18.5k with truck and trailer combo...
bayou
Full Access Member
when i first got my cc i was at 7 empty. i never towed with it because it wouldnt pull my toy over 45mph! but now with the new ip, injectors, and exaust im at 11. but atleast i can tow!
diesels only? my uncles 460 79 bronco gets 4-5 empty. but it's also putting out about 450 hp. that was on 38" claws, might be better now that he dropped to 36" tsls
my idi gets about 13-14 empty. i know if i turned down the fuel some it'd be better but I dont wanna risk losing hp.
my idi gets about 13-14 empty. i know if i turned down the fuel some it'd be better but I dont wanna risk losing hp.
Worst was towing a '70s model 28ft camper to NC. Dont know the wieght but that thing was a brick going down the interstate. At 70-75mph most of the way I averaged right around 10mpg.
Unloaded or with a light load (2k or less lbs payload or 6k or less lbs towing) I can get 15+mpg.
Unloaded or with a light load (2k or less lbs payload or 6k or less lbs towing) I can get 15+mpg.
badaceds650
Full Access Member
Around 10 pulling I think, I don't keep track very often. Running wmo pretty much all the time, makes it so I just don't care 
If u really want me to calculate it out I will, but I will guess to say my 86 gets 2 mpg now. But less not forget it doesnt go any faster than 15 mph
stumiister
Diesel Truck Tech
We've got a best mileage thread, how about a worse mileage thread?
I got a whopping 6.23 mpg......
Are you sure it wasnt 6 gallons to the mile, HAHAHAHA
94IDIT
Registered User
The worst I've seen was 11 in town in my '90... That was with quite a bit of idling though. It usually gets 15-17. And I hear ya about that wind! I'm from the black hills, and in the extended E-350 I was driving for work I just about got blown over!
eatont9999
Full Access Member
The worst I got was about 10MPG before the injection overhaul. After that, and setting the timing, I have seen 21.5MPG on the highway unloaded. I haven't been able to get that again but it happened. I usually get 14-16 mixed driving, unloaded. 16-18+ highway. About 16MPG highway with a 6x12 cargo trailer over 4000 miles half of which being full of heavy tools and furniture.
gatorman21218
Registered User
The truck... 10mpg with an IP weeping fuel and both IP and injectors having 175k miles. now I get 15
the old boat... a 47' Atlantic with twin DD 671Ts. 25 gallons an hour going 12 knots. The old detroit. least efficient at mileage but most efficient at converting diesel into noise (or music)
the old boat... a 47' Atlantic with twin DD 671Ts. 25 gallons an hour going 12 knots. The old detroit. least efficient at mileage but most efficient at converting diesel into noise (or music)
well if you want to go that way......
our fuel car. blown keith black alcohol motor. we had it at a car show and a lady asked what type of fuel mileage does it get. so dad sat there and thought about it and replyed 24 gallons per mile. she said oh ok and waled away, then stoped and turned around confused. dad said yes that is right, 24 GPM. car burns 7 gallons per 1/4 mile run....
our fuel car. blown keith black alcohol motor. we had it at a car show and a lady asked what type of fuel mileage does it get. so dad sat there and thought about it and replyed 24 gallons per mile. she said oh ok and waled away, then stoped and turned around confused. dad said yes that is right, 24 GPM. car burns 7 gallons per 1/4 mile run....
