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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis SPONSORED BY:

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  #31  
Old 07-18-2010, 08:54 PM
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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 !
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  #32  
Old 07-21-2010, 01:00 AM
Rambler16 Rambler16 is offline
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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.
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  #33  
Old 07-21-2010, 02:06 AM
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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.
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  #34  
Old 07-21-2010, 04:07 AM
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Quote:
Originally Posted by StanleyZ View Post
Thank you, we like it a lot, just wish it didn't "make oil".
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!
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  #35  
Old 07-21-2010, 10:12 AM
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Originally Posted by DuallyMike View Post
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!
Yeah, that's right. Pull that big 5er with a 5.4L gasser. LOL You can get some interesting comments on these web sites. As to the oil making: I bought my truck with 4000 miles on it. It's a job 1 and I did my due dilegence and knew what I was getting so I expected it to make oil and it did. The interesting thing is that it only seems to make to a point. I check daily when I'm on the road and using the "short stick" method it goes just under the top of the fob and stays there. I just towed from Atlanta to Cheyenne and it was about an eighth of an inch from the top of the fob and has stayed there the whole trip. Someone has opined on here that the truck only makes when doing light duty around town type driving and so far that's ringing true for me. I'll give everyone a full report later in the trip and that's one of the things I'll cover.
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  #36  
Old 07-21-2010, 11:42 AM
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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.
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  #37  
Old 07-21-2010, 06:30 PM
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5.2 - 5.7mpg with a 17,000lb trailer.
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  #38  
Old 07-21-2010, 07:59 PM
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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!
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  #39  
Old 07-21-2010, 08:41 PM
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Quote:
Originally Posted by recycleman View Post
5.2 - 5.7mpg with a 17,000lb trailer.
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.
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  #40  
Old 07-21-2010, 09:50 PM
Rambler16 Rambler16 is offline
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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.
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  #41  
Old 07-22-2010, 10:29 PM
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Quote:
Originally Posted by WhiteEx View Post
I weighed at Flying J at the start of the trip and I was 19,700, that's all 4 axles.
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.
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  #42  
Old 07-22-2010, 10:55 PM
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Quote:
Originally Posted by hlozano View Post
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.
I think it costs to weigh at J. Are you acquainted with any grain elevators? Regular customers no charge mostly. Guests might pay a dollar or two.

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.
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  #43  
Old 07-22-2010, 10:57 PM
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Quote:
Originally Posted by hlozano View Post
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.
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.
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2014 DRW, CC, 4X4, Lariat. 85 gallon in bed auxiliary fuel tank, UWS tool box, spray in bed liner by Bullet liner and a little truck bling.

GONE NOW:2008 DRW CC deleted and tuned. Bullet proofed motor and built transmission, totaled by a drunk old woman. I miss it. 2001 F250 4X4, loaded with stuff and a great truck but my big 5er was just too much to handle for her.
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  #44  
Old 07-22-2010, 11:21 PM
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at the CAT scales up the road on the interstate here its $8.25 for weighing..

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  #45  
Old 07-23-2010, 09:43 AM
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Thanks for all the info.
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Old 07-23-2010, 09:43 AM
 
 
 
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