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Pickups Ford F-Series 2008 Ford Super Duty
355 messages, Last post on Nov 13, 2009 at 9:21 AM
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| Took a trip to Key West from Louisville, KY towing my 34 ft fifth wheel. Loaded and with three persons. Got 9.5 mpg on way down 60 to 65 mph. Average 10.5 mpg on return. Had only 2500 miles on odometer when we left. No modifications needed. When driving solo on highway get about 18-20 mpg, at 60-65 mph. Avg around 15.5 around town. My friends tell me it will get better as the miles travelled increase. | |
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I have a 2008 F250 super duty, I live in Louisiana and pull a 16' box trailer with truck and trailer together it is 18,000 lbs. in hot weather it starts like a valve tapping then it blows white smoke out the exhaust, then it quits running. You let it set for between an Hour and a half, then it will start and run for about 30 to 40 miles then do it again. In cold weather no problem but in the hot summer weather in the south look out. I pulled the same trailer in Jan. to Michigan and nothing happened. But again in the south where it is hot it will leave you on the side of the road. ANY HELP WITH THIS PROBLEM?????????   
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Replying to: streetrod46 (Jun 17, 2008 9:41 am)
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| Recently got back from a trip up to Indiana Dunes. Spent the weekend and return on Sunday. Have a F-350, crew cab, 2WD with 6.4 Powerstroke. Got about 11.4 mpg going up and 11.9 mpg. Truck ran like a dream pulling my fifth wheel travel trailer ( approx 13500#s ). While enroute had a exhaust cleaning occur with no loss of power or noticable mpg loss and no smoking. With 6500 miles on the odometer all is great. | |
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Replying to: firecapn (Jun 18, 2008 3:48 pm) The computer says it is overtermp. exhaust temp. module. was changed then got 35 miles down the road and it quit. The days of the mechanic is long gone all they have now is parts changers. Whatever the computer says is the problem!!!!!!!!BS to that. 
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 Can any one give a suggestion on which air intake they like for the 08 supers. I hate my new 250 and am desperately trying to do something to improve towing and maybe mpg when empty. I only get about 11 around town. I did the worst thing when I traded my 02 350 with the 7.3 in for this hunk of crap.
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Some of you, who are getting upwards of 10 MPG -------- consider yourselves LUCKY! I'm currently RV'g throughout Washington, Idaho, British Columbia. While our Lariat is a great truck in most respects, it's a PIG when it comes to economy ---------- averaging less than 8MPG with a 10,000lb 5th, while trying to do everything to "go easy" on fuel economy. 80PSI in tires, easy starts, 55MPH, TowHaul on where needed, etc. My brother (after 9 new F350 Diesels in the past 10 years) is trying Dodge's "equivalent" with the 6.7 Cummins. He consistently gets 40>50% better economy on the same trip. BUMMER! RUDY |
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| I'm looking into getting an 08 F-250, but I'm not sure what Engine-Transmission-Rear Axle Ratio to get: 5.4L V-8 Gas-5 speed Auto Transmission-3.73/4.10, 6.8L V-10 Gas-5 speed Auto Transmission-4.10/4.30, 6.4L V-8 Diesel-5 speed Auto Transmission-3.55/3.73. What will give me better MPGs? | |
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