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View Full Version : F450 fuel mileage.


muddstopper
02-24-2008, 12:01 AM
For those with F450 and the 6.4 diesel engine. What kind of fuel mileage are you getting. My truck is a 4x4 flatbed and auto tranny and is only getting 7.4 MPG. Seems kind of low to me, The truck only has 800 miles on it, but I am thinking it needs to go back to the dealer for a checkup.

I already know somebody will have something smart to say about it should of been a duramax. Well I traded a 4500 Dmax in with 14,000 miles for this ford so dont even get me started.

DiGiTLawncare
02-24-2008, 12:39 AM
I had a F450 12ft Flat Bed 2wd with the 6.0 in it. Best it ever saw was about 11. I was not to impressed at all. I have had powerstrokes forever but made the cummins swap for a while. But 7.4 seems really low the 6.4 are susposed to be better on fuel than the 6.0's were.

nosparkplugs
02-24-2008, 12:44 AM
Diesel Fan here, that sounds average for a 4x4 4500 diesel, the new diesels have the (DPF) diesel particulate filters, among other EPA Mandated tier 3 emisson requirements that reduce fuel economy regardless of brand. The engine is new be patient, switch to a good synthetic engine oil that helps. Most likely you have 4:10 gears, these trucks are designed to work, measured in GVWR hauled. I always say if you can afford the note, you can afford the fuel. I feal your pain

GravelyGuy
02-24-2008, 01:04 AM
I have several friends that are farmers that have the new 6.4 PS and they all have commented on the mileage being bad. 7.4 MPG is just crazy, I would assume it will go up the more miles you get on it though.

LawnProLandCare
02-24-2008, 02:48 AM
I have several friends that are farmers that have the new 6.4 PS and they all have commented on the mileage being bad. 7.4 MPG is just crazy, I would assume it will go up the more miles you get on it though.

all the new diesels are taking a hit in the mpg department, thank the new emissions standards on diesels for that. also being the truck that it is it will have most likely AT LEAST a 4.10 gear ratio in it maybe even 4.30's... also with 800 miles on it your trucks still a new born but i dont think mpg gains will be extremely significant.

Gravel Rat
02-24-2008, 03:11 AM
My current 03 F-450 with 6.0 power gets 11 to 12 mpg which I'am happy about my 7.3 IDI and 7.3 PSD F-450s got the same mpg.

You are not going to get good mileage out of a heavy truck with lower gears.

The new emmisions motors are worse for mileage. If your buying a diesel for good mileage your barking up the wrong tree. The days of good mpg are gone same with class 8 trucks.

Scag48
02-24-2008, 05:11 AM
We were getting 12MPG with a 12 foot flatbed, lift gate, and 100 gallons of diesel in an automatic 4x4 7.3 F450. They don't get very good mileage, but the 450's are built way strong.

BrandonV
02-24-2008, 09:24 AM
I tell you that sucks, my C7500 w/ cat and 10speed gets better than than and it weighs 16k unloaded.

Landrus2
02-24-2008, 09:33 AM
That is at very best 8 miles per gallon but they do have lots of torque.:waving:

POPO4995
02-24-2008, 10:21 AM
The best I have heard of anyone getting is like 11mpg.:dizzy:

BrandonV
02-24-2008, 10:49 AM
That is at very best 8 miles per gallon but they do have lots of torque.:waving:

i get around 8 on average, mine isn't a dump and I average 12 highway w/o trailer and unloaded... of course I'm never unloaded :-)

BIGBEN2004
02-24-2008, 11:02 AM
His truck is a F-450 so it has either 4.30 or 4.88 gears in it. They do not offer 4.10 gears in the F-450 or F-550. With the new emmisions you can kiss the good MPG days good bye for now untill they figure a way to make high HP and TQ all with meeting emission standards adn giving you good MPG. Our F-550 on our farm has the 6.0 Powerstroke and has 4.88 gears in the rear and the best it does is around 8 or so. They do not do good on milage and that is just it. It is a shame since our Freightliner Tractor with a 48' trailer loaded up to around 80,000 pounds does around 6 MPG.

stroker51
02-24-2008, 12:46 PM
Does anybody else find it ironic that the EPA makes the engine manufacturers build cleaner engines, so the emissions are less. But yet with these engines from what i've heard so far you will burn 1.5 to 2 times the fuel of the old dirty engines? 11 is the best i've heard out of a new 6.4, and that was an F250 crew cab short bed 4x4. Hopefully they will get this technology working for cleanliness and mileage, i'll only be able to run 7.3 psd's for so long before they're obsolete.

hosejockey2002
02-24-2008, 12:59 PM
Wow, 7.4 is pretty bad. My V10 gas motorhome gets that moving 17,000 lbs. I'd think you should get 10 or so if you keep your foot out of it.

nosparkplugs
02-24-2008, 04:17 PM
I get 12.6mpg with my 2500 hauling 13,500GTWR, The used diesel truck market is boomingin Memphis due to the newer diesel engine emission requirments DPF's, dam tree huggers, diesels actually produce less pollution, we are the scape-goats. Diesel is up to $3.50ga here I still am paying less per month in diesel fuel,compared to the Dodge 2500 v8 Magnum I was running before. Remember diesel is 147,000BTU per gal, gasoline is 125,000BTU per gal, diesel has more energy per gal, even with the weight penalty we outperform Gasoline engines for towing. Imagine your F-450 with a big block gas burner, you would be filling up double or triple to what you are now in the 6.4diesel.

TXNSLighting
02-25-2008, 09:49 AM
Like everyone else has said... But yes 450s come with only 4.30 or 4.88's. so theres a big hit, and of course the new crappy emmisions (that shouldnt be on there) are killin em. i have actually heard the job 2 trucks are getting a little better fuel milage. single wheels are in the high teens on the highway. so i think if you can just wait it out, they will get it figured out. and give yours til about 10000 miles, it should get to about 10 hopefully. just remember, you shouldnt buy a 450 if your concerned about fuel mileage. theyre made for towin 25000 pounds+!

DK lawn care
02-25-2008, 01:00 PM
For those with F450 and the 6.4 diesel engine. What kind of fuel mileage are you getting. My truck is a 4x4 flatbed and auto tranny and is only getting 7.4 MPG. Seems kind of low to me, The truck only has 800 miles on it, but I am thinking it needs to go back to the dealer for a checkup.

I already know somebody will have something smart to say about it should of been a duramax. Well I traded a 4500 Dmax in with 14,000 miles for this ford so dont even get me started.

Does your truck go in to regen mode alot? That uses alot of fuel inorder to burn off the soot. And texas lanw is right, ford never offered a 4.10 rear end in 450. 4.30s stock and 4.88 as a option.

BTW for the owners of the 6.4, check this link, ull be verrry impressed:

http://www.ford-trucks.com/forums/709345-tuned-dyno-numbers.html

This is a 6.4 running 854 foot pounds of torque with DPF removal, and a chip. Pretty impressive.

TXNSLighting
02-25-2008, 01:22 PM
very nice!! that makes me excited!

DK lawn care
02-25-2008, 01:48 PM
Id imagine that u might get better MPG with out a DPF (no using gas to burn off the soot). But i kno u have to do somethin with the trucks computer. But for any ford truck owner on this site, you should join www.fordtrucks.com/forums. Its free and its the largest ford site on the internet. BTW they also have a 6.4 forum and trust me, their are alota smart ppl in that forum.

Gravel Rat
02-25-2008, 02:01 PM
You don't want gears taller than 4:30s in a F-450. My F-450 has 4:30s and I can't use OD (6th gear) 6spd very often it is too tall. My truck has 6.0 power. I have used 6th gear to pull 10% grades but the RPMs are down to 1200. Truck weighs 9300lbs empty pulling a 10% grade in 6th at 62mph but I had to get a good run at the 1 kilometer grade.

The 6.0 is the last diesel in a Ford that will get decent mpg.

DK lawn care
02-25-2008, 02:08 PM
You don't want gears taller than 4:30s in a F-450. My F-450 has 4:30s and I can't use OD (6th gear) 6spd very often it is too tall. My truck has 6.0 power. I have used 6th gear to pull 10% grades but the RPMs are down to 1200. Truck weighs 9300lbs empty pulling a 10% grade in 6th at 62mph but I had to get a good run at the 1 kilometer grade.

The 6.0 is the last diesel in a Ford that will get decent mpg.

Gravel rats right, these trucks are made to pull verry heavy loads. Which require 4.88s or even 5.13s depending on which platform u get.

People who bought diesels payed that 5 to 6k price tag for the diesel motor for higher mpgs and more power. But now since diesels are getting the mpgs of a gas motor because of emissions, that 6k price tag is now only for more torque. I dont see the gas mileage of a diesel going up anytime sooner unless sometype of new technology comes out.

Gravel Rat
02-25-2008, 02:37 PM
The tare weight of a F-450 of F-550 isn't light. My truck only has a 12 foot deck on it and weighs 9300lbs. It does have some extra custom made crossmembers in the frame from the previous owner which I will remove when I get around to it that probably adds a extra couple hundred pounds.

I think about it when I started 1 ton trucking my first F-350 flatdeck only had a tare weight of 6800lbs compared to my current F-450 9300lbs a difference of 1 1/4 tons. The gvw is the big factor the F-450 has a rear axle capacity the same as the gvw on a F-350.

I used to put 3 tons on my F-350 and that was a heavy load put that on my F-450 it smooths out the ride :laugh:

Rex Mann
02-25-2008, 02:54 PM
I have a 2005 F450 4X4 with a pickup body.
It weighs 9500 with a tank (33 gallons) of fuel
and me in it. It has the 4.30 gears. I get 12 MPG
empty. And, 10 MPG when pulling or hauling using the
OverDrive.

Peace,

Rex

http://PaverExperts.Com

topsites
02-25-2008, 09:26 PM
don't drive it like a gasser, that hurts the worst.

jsaunders
02-25-2008, 09:31 PM
Truck is still new- yet any truck with 4.30 or 4.88 isn't getting great mileage- but you can tow a house.
My f450- 550 with 7.3 diesel got 10 mpg (4.88)
my f350 with 7.3 diesel gets 10-11 mpg (4.30)

muddstopper
02-27-2008, 09:11 PM
Take a few days off and come back to a ton of replys. Thanks to all.

this truck does have the 4:88 posi gears, front and back. Its tagged for 26,000 and the first time I loaded it it weighed 26,400, with trailer. ( had to see how it pulled):laugh: Normal road weight is 14,000 +/- lbs. I dont pedal to the metal in this truck. No interstate driving, mostly 2 lane crooked roads. I was talking to a tractor trailer driver today, he claims hes getting 6mpg, Maybe i should buy a bigger truck, at least i could hual more and make fewer trips.

BrandonV
02-28-2008, 07:49 AM
Maybe i should buy a bigger truck, at least i could hual more and make fewer trips.

that's what I've found, used to have all 450s now we're down to 1 450, 2 350s, 1 crewcab mitfuzo, 1 ford lcf, 1 ford 750, 1 chevy c7500 (trailer puller) and a FL60... guess which trucks get the miles... the big ones. the smaller trucks just take guys to the jobs, and next time I don't see use really for the 350s, likely replace them w/ smaller more fuel efficient rides.

CLS LLC
02-28-2008, 11:11 AM
If you are lucky enough to live somewhere without emissions give it a year. The after market companies will have so many different things to increase gas mileage you won't know what to get first. And it will all be worth it not just for the increase power, but because the parts will pay for themselves in less than a year, with gas savings. All you'll need to do is get an exhaust and a chip or reprogram and you'll be seeing 50% better mileage. Just wait it out.