6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
That's pretty slow dragging a 5er down the interstate.
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My Sierra Blanca is a '99.5 PSD CrewCab hot-rod Towing Machine! BTS tranny; TurboRamAir intake and 4" stainless turbo-back exhaust; DP-Tuner tunes flashed into an Edge Evolution tuner; ISSPRO EV gauges and TTM; AIC; SP-Diesel exhaust brake and torque converter controller. I special-ordered it new and plan to drive it until it quits.
How many miles you have on that truck now? I would think you would be in the mid to high 8's.
I only get 9.5 towing a all aluminum V nose 2 place snowboile trailer. Rated at 3500lbs. Thats towing empty. The mileage is bad on these rigs. If I was towing flat turf all day I might get 10.5. I tow from Ma. to NH.
As you can see in my sig I'm 3.73's SRW Lariet CC Short bed.
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08 F350 Lariet DK.Blue/Silver CC Short Box SRW. Auto transmission, Manual 4x4,Supplemental Cab Heater,3.73 Limited Slip.Gator Guard Bedliner, 6.5 x 12 Sno-Pro,8ft. Fisher.
04 Lance 820.
There seems to be some quirks that allow some trucks to do better than others. Talked with a good friend who got fed up with his 06' Ford and bought a new Dodge. He says he's really chapped now...claims the best he has done with his 3500 is 10.2 empty. Even with my 37's I get a hand calculated 12.7 empty around town and up to 16 on the highway. Thanks to the DPF, regardless of Make, we all seem to be suffering.
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2008 Ford F350 Long Bed
White/Pueblo Gold Accent
Lariet, Automatic
Loaded, w/exc. to Navigation
Skyjacker 6" Lift and Steering Stabilizer
Toyo 37"x13.5-20 MTs
Eagle Alloy Chrome 114s
Amp Research Electric Steps
There seems to be some quirks that allow some trucks to do better than others. Talked with a good friend who got fed up with his 06' Ford and bought a new Dodge. He says he's really chapped now...claims the best he has done with his 3500 is 10.2 empty. Even with my 37's I get a hand calculated 12.7 empty around town and up to 16 on the highway. Thanks to the DPF, regardless of Make, we all seem to be suffering.
All of my buddies that are pulling similar size trailers with new trucks are seeing about the same mileage I am. The Dmax's seem to do about 1-2MPG better unloaded. Most likely because they are 1000lbs lighter.
I spent some time lurking on the Dodge and Dmax boards and the mileage they talk about does not seem much differant than the PSD's.
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'08 F350 cc SRW 4x4 white/stone
Last edited by SmokeyWren : 05-08-2008 at 06:26 PM.
Reason: fix quote
Ill let you know if the 6.7 mileage is any better or worse than the 6.4 in a month or so when I get the bed welded and installed.
well my mileage has not gotten any better. i have never experienced any "better mileage after break in" on any of my trucks. they have steadily gotten the same or a bit worse. i am at 26k now, and i am lucky to get 7 pulling my rig, and thats really taking it easy. usually its about 6. empty around town is really bad. its like 9.5 maybe 10, i stopped checking it, but i am filling up a lot more these days, only gettng about 320 out of a tank. and no there is nothing wrong with the truck, it is always serviced and the fuel filters changed and such. air filter too. it just sucks fuel. i have decided to trade it in june, as i have been working out of town and won't be done with that until end of may. it really sucks because i like my truck. but its just too much money these days. will be getting a dodge this time around.
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08 f450 KR 4X4, no roof, no tv, everything else
05 KZ New Vision 41ft toy hauler
03 harley roadking classic
03 honda rubicon
05 bombardier DS650 http://i5.tinypic.com/4ue76eq.jpg
Last night I pulled 280 miles, first half with empty goose. Elevation changes from 5,400' to just over 8,000' then back down low as I started from. 8.3 mpg meter, loaded small hoe, reset meter, back home over same road reading 4.4 mpg for the first 19 miles pulling uphill, then finished up at 8 mpg flat rolling home into the yard. 60 mph average speed, coasting in neutral down the moderate hills, weighing at 31,000 loaded, bone stock truck, accurate meter and fueling at 4.49 a gal makes me feel like hanging Al Gore frome my ginpoles.
I was talking to a guy yesterday in an 07.5 Dodge with the 6.7. He said he traded a 06 with the 5.9. His mpg went from 19 to 14.5. He hopes it gets better, I don`t think it will.
I have a 08, CC, SB, SRW, and just did a trip from St Augustine, Fl to Florence SC pulling my 5th wheel that weighs 12,500 pounds. Kept speed at 64MPH and by hand calculation I got 9.7 mph. Flat land and almost no wind.
Don
I pull a Hitchhiker Discover America in my business about 5 to 6 months per year. I installed MorRyde IS Axles and Kodiak Disc Brakes with a HD3000 Actutor. I'm back using my early 99 F-350 SRW, after trying a 2003 & 2005 6.0 liter trucks. The 03 was OK, but the 05 was better. I never got much more than 10 mph while pulling. With 4:10 gears in the DWR, it was great into a head wind, but could never run down the road all day at 70 mph and maintain more than 8.5 mpg. Since going back to my 99 with 3:73 gearing, I sacrifice the stability of duals, but have more power and can run all day at 70 to 75 on the interstate hwys and maintain 9.5 to 10 mpg. I think once I update my turbo, I should gain 2 to 3 mpg, if I put the right application in. I also need to get with DP to reflash to his new 80 hp towing mode, which should help. However, my old 7.3 broke on Thursday, so don't know what the new motor will do until I get some miles on it. I scale out at about 25, 300 on the scales. My RV axle weight is 12,200 or so. I think the trailer weighs 15,200. I use Diesel Serve every 3rd tank or so. Have tried the cetane booster, but don't see much results vs cost. Saw a number of posts this weekend on this site about DP's new 80 hp tow, so am going to call him first thing. Kybo
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Early 99 F-350 (12-98) SRW w/8' Box 4 x 4 Black w/Tan lower accent; 2002 7.3 w/Updated Turbo; Ford AIS Air Intake; Magna Flow 4" exhaust; DP Tuner 60wTrans,60 w/o Trans, 80 economy & fast idle set; BD-Power Digital Monitor; Trans by Kevin at BWD/Junge Ford; 6.0 Liter Trans Cooler; Mag Hytex Trans/Diff Covers; Atlas Rear Leaf Rebuilds; AIR LIFT Air Bags; Monroe Reflex (will switch to Gas Magnums); SW Texas Outfitters Front & Rear Bumpers; Michelin LTX Tires; Transfer Flow 58 Gallon Replacement Fuel Tank; Pull 15,000 lb Hitchhiker DA 5th Wheel RV w/Kodiak Disc Brakes; HD 3000 Tow Brake Actuator; MorRyde IS (Independent Suspension Axles); PullRite 25K 5th Wheel Hitch.
Well I towed my 38' Raptor (15,000#) w/ my F-450 w/4.30 rear for the first time this last weekend and I got 8 mpg which I didn't think was to bad considering I averaged 65-70 mph.
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2008 F-450 "Lariat" Fully Loaded (Picked Up 01/26/08)
2008 Ford "Focus" (To Help Out With My Diesel Guzzling F-450) "Did I Say I Love My F-450 Though"
2007 Raptor Toyhauler 3612DS http://i181.photobucket.com/albums/x...Picture221.jpg