Last post on Nov 25, 2013 at 4:52 PM
You are in the Ford F-Series
What is this discussion about?
Ford F-350, Ford F-150, Ford F-250, Fuel System, Fuel Efficiency (MPG), Truck
If you're looking for a place to discuss real world mileage figures for your Ford F-Series pickup, this is the place!
#1 of 155 F350 6.0 Fuel Mileage
Dec 23, 2004 (8:00 pm)
Please give mileage figures for the 2005 F350, 6.0 Diesel, Crew Cab, DRW, 2WD, 4.10 LS rear end. Thanks
#2 of 155 Re: F350 6.0 Fuel Mileage [wahooo]
Dec 25, 2004 (1:56 pm)
2005 F350 Lariet Crew Cab, 6.0, 4x4 SRW, 3.73 gears. Second tank, 18 MPG.. less than 1000 miles..What a truck!!! Pulles like a bandit.. I am going to order exhaust and chip soon I think..
#3 of 155 Livinf up to your expectations?
by PFFlyer@Edmunds HOST
Jan 05, 2005 (8:19 am)
How is your F-Series truck treating you at the pump?? Are you beating those EPA estimates in the real world?
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#4 of 155 '99 F-350 4x2 7.3L 6-Speed SC Dually
Jan 05, 2005 (5:02 pm)
I get around 18 mpg highway, empty under 70 mph. Over 70 mph drops me to 16.5 mpg. Loaded with my Jeep on a 16' flatbed, probably grossing about 11,000lbs, I'll get around 14 mpg. Pulling a larger trailer, grossing over 15,000lbs, the mileage drops to around 11 mpg. This truck currently has 165,000 miles on her.
#5 of 155 Re: '99 F-350 4x2 7.3L 6-Speed SC Dually [mullins87]
Jan 06, 2005 (10:46 am)
Those #'s are very consistent with what my grandfather gets with his '97 350 7.3L 4x4 (non-dually). The most significant drop in mileage comes speeds over 70mph (which he does frequently). He has noted that his 35' dual-axle 5th wheel trailer nets him worse mileage (11-13 mpg depending on winds) than his 40' quad-axle boat trailer for his 32' cabin cruiser (~14 mpg), even though the boat weighs better than 3x as much. In his words, "the boat pulls much easier."
In my opinion, these are all very good #s considering I get about 11 mpg with my '69 Chevy 307 running empty and drops fast when I pull a load, and I would be crawling if I pulled that boat trailer while he pulls it at 65 mph even up some sizable grades.
Jan 13, 2005 (5:15 pm)
I drive this thing like a baby, rarely gunning it and easy on the breaks and still can't crack 15 mpg even on the HWY with nothing in the bed.
#7 of 155 2004 F-250 Gas Mileage Problem
Jan 19, 2005 (8:11 pm)
I have a 2004 Ford F-250 Crew Cab 6.0 diesel. It has 3.73 gears, 35" tires and a 5 1/2" lift on it. My average gas mileage is 13.7 highway, 11 city and 5.6 towing. When I took into Ford they told me that the towing numbers were really low, and chances were something was wrong. When I picked it up they told me that NOTHING was wrong and that the mileage is what it is. Has anyone heard of this before?
Even before my modifications, the best I got was around 14 highway. There is only 6700 miles, and the service guy said to wait until it breaks in, and then the mileage should start to go up??
#8 of 155 First, you're probably not
Jan 19, 2005 (8:28 pm)
calculating correctly - did you install a new speedo gear to correct for the 35" tires? Those are 3-4" taller than stock, throwing off your speedometer by around 10-12%, depending on what tires came stock (235/85-16, 265/75-16, or 265/70-17) - you're traveling a lot more miles than your odometer is recording...
Secondly, if you're like me, you're not driving like a grandma - like me, you've probably done Banks or Bully Dog exhaust, and love to romp is to make it make noise...that flat KILLS your mileage.
Combine incorrect calculations with less than conservative driving, and I'd say you're doing pretty good.
The towing mileage? Those 3.73 gears are too tall to try to tow with 35" tires - you need 4.11s or a little higher to adjust to normal operating ranges (engine and transmission) - you're working them pretty hard with the 3-4" taller tires and no change in gear ratios.
#9 of 155 Re: First, you're probably not [driftracer]
Jan 21, 2005 (8:14 am)
I thought that you no longer had to change speedo gear to adjust for larger tires. All the dealer needed to do was program in a new value for the larger tire circumference, and then the computer adjusts the speedo and odometer accordingly for the new number of revolutions per mile.
#10 of 155 No, the stock ECM
Jan 21, 2005 (10:56 am)
can't do that for non-OEM tires, you need a piggyback ECM to do that, and a laptop - I would seriously question the ability of any technician (in a dealership) to be able to do this - having that adjustable software actually voids your warranty...
Even if the recalibration was done, that's still a lot more work for the engine and trans, especially when towing - just because the speedometer may be accurate, it doesn't account for the extra weight and rolling diameter your engine has to push around, especially when towing.