MPG-6.4l
Freshman User
Joined: Nov 2009
Posts: 41
Likes: 0
From: Frankfort, Ky
I havent figured mine in town but, I WAS getting at first on the highway 14 1/2 truck alone and pulling a 18 foot enclosed trailer was 9 1/2mpg.
Truck has now gotten into this stumbling and lose of power and now gets 12 1/2 truck alone on highway and.......6 1/2mpg highway pulling my trailer.
Have had it in the shop 3 times, cant find anything wrong, finally they are going to replace the CAC under a TSB, only have 12K miles on my truck and it has been like this since 5K miles !
Truck has now gotten into this stumbling and lose of power and now gets 12 1/2 truck alone on highway and.......6 1/2mpg highway pulling my trailer.
Have had it in the shop 3 times, cant find anything wrong, finally they are going to replace the CAC under a TSB, only have 12K miles on my truck and it has been like this since 5K miles !
New User
Joined: Jul 2010
Posts: 12
Likes: 0
From: S. CA
Relatively new 2010 f250 with 1200 miles. Around town 13.5 mpg. Highway 180 mile round trip no load; 18.4 mpg. 110 mile Round trip hauling 10,000 lb. toy hauler we averaged 13.2 mpg. Drove it easy and seldom exceeded 70 mph. Same trip with the toy hauler and my 08 Tundra we averaged 7.5 mpg.
Freshman User
Joined: Nov 2009
Posts: 41
Likes: 0
From: Frankfort, Ky
The figures your posting, I can see that on mine if I look at the dash and pay attention to that dumb average miles per gallon thingy they have in the dash, it needs a hammer taken to it on mine, its 3 to 4 miles per gallon off when you check it at the pump.
Mountain Pass
Joined: Nov 2009
Posts: 100
Likes: 1
Hey stanley, haven't been on the site for a while. Didn't know your truck was makin' oil. Did that start recently? Have you done the oil evaluation? Just curious, I have almost same truck as you, but I got a short bed with 3:73 in my dually. Haul a 15K toyhauler up and down the east coast so I needed the diesel- 2008 job 3 and it just turned 9000 miles! Guess I fit in the class that shouldn't have a diesel!
Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
Hey stanley, haven't been on the site for a while. Didn't know your truck was makin' oil. Did that start recently? Have you done the oil evaluation? Just curious, I have almost same truck as you, but I got a short bed with 3:73 in my dually. Haul a 15K toyhauler up and down the east coast so I needed the diesel- 2008 job 3 and it just turned 9000 miles! Guess I fit in the class that shouldn't have a diesel!
Freshman User
Joined: Nov 2009
Posts: 41
Likes: 0
From: Frankfort, Ky
Just got back from the garage, replaced the CAC. Did a coolant pressure check and this time it lost pressure so, they ordered both EGR coolers, EGR and a thermostat, will see what happens after they replace all of that.
Senior User
Joined: Mar 2006
Posts: 366
Likes: 1
From: Fredericksburg, VA
I have a job 3 2008 6.4L 450 with the 4.30 rear end. Mileage is ~42,000, and being a 450, it has dual rear wheels. It is 100% stock, not even any fuzzy dice hanging from the mirror.
I just returned from a Virginia to Ontario trip (1715 miles each way), hauling my truck camper and towing a 21' fiberglass boat, see photo below. I weighed at Flying J at the start of the trip and I was 19,700, that's all 4 axles. I maintained 65 mpg when traffic allowed, and never exceeded it. I drive very conservatively, no rapid starts or unnecessary hard acceleration. The camper does add significant wind resistance.
Going, against a nasty head wind all the way, averaged 7.8 mpg. Returning, with no wind (don't think I have ever had a tail wind), averaged 8.9, a 14% but still pathetic increase.
I would love to delete the DPF and add a programmer, but can't quite afford it and am paranoid about the warranty. But at least we did get to annoy a lot of fish!
I just returned from a Virginia to Ontario trip (1715 miles each way), hauling my truck camper and towing a 21' fiberglass boat, see photo below. I weighed at Flying J at the start of the trip and I was 19,700, that's all 4 axles. I maintained 65 mpg when traffic allowed, and never exceeded it. I drive very conservatively, no rapid starts or unnecessary hard acceleration. The camper does add significant wind resistance.
Going, against a nasty head wind all the way, averaged 7.8 mpg. Returning, with no wind (don't think I have ever had a tail wind), averaged 8.9, a 14% but still pathetic increase.
I would love to delete the DPF and add a programmer, but can't quite afford it and am paranoid about the warranty. But at least we did get to annoy a lot of fish!
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Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
Wow, are you towing at 80MPG. My 5er weighs just about 17K and the worst I've ever gotten was 7.5. Normal towing comes out somewhere between 8.8 and 9.3. My trucks a DRW with a 4.30 Rear axle and I tow at 60 MPH.
New User
Joined: Jul 2010
Posts: 12
Likes: 0
From: S. CA
The figures I have posted were done by dividing the incremental milage by the number of gallons when filling up. I've only done it 4 times and the on-board computer has only been off by .1 or.2 MPG each time. It is actually pretty close.
Senior User
Joined: Jun 2005
Posts: 321
Likes: 2
I didn't know you could do that at Flying J's. Does it cost anything? I'd love to find out where am at loaded and how much the 5ver ways loaded up.
Elder User
Joined: Jan 2008
Posts: 617
Likes: 0
From: Washington,KS/Lincoln,NE
My local elevator has outdoor digital readouts on their scales that operate 24/7. And I own enough of it that I'll never see that I don't mind using the scale at whim.
Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
I think you can weigh at any scale. Cost a little, like 15 bucks or so. The hard part is getting up to the speaker and intercom. I always go in to the weight desk and make arrangements first. You pull on and follow the lights and then go back in and get the write up. You get the weight for all the axles. It's the only way you can ever know what you are towing.
