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Ford F-Series Real World MPG Numbers

134 messages,  Last post on Jun 07, 2009 at 5:57 PM

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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!

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#8 of 134 First, you're probably not by driftracer 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. Replies to this message: wpalkowski (Jan 21, 2005 8:14 am)
#9 of 134 Re: First, you're probably not [driftracer] by wpalkowski Jan 21, 2005 (8:14 am)
Replying to: driftracer (Jan 19, 2005 8:28 pm) 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 134 No, the stock ECM by driftracer 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.
#11 of 134 Re: 2004 F-250 Gas Mileage Problem [knmhoffman] by mullins87 Jan 21, 2005 (9:23 pm)
Replying to: knmhoffman (Jan 19, 2005 8:11 pm) I'd say you're probably doing about as well as can be expected considering your current setup. I agree with the others that you need to regear to 4.11's. If my "off the cuff" calculations are correct, 4.11's should put you pretty close to factory gearing.   I have a Jeep Wrangler with the little 2.5L 4 cylinder, 4.10 gears and 31" tires. To the best of my knowledge, it has never broken 15mpg.
#12 of 134 Fuel Tank Modifications by superduty1 Jan 22, 2005 (10:57 pm)
Just bought my first 2005 F-250 Crew Cab Diesel with the 6 1/2 foot bed. I really enjoy my truck. I just wished it came if a larger fuel tank. Has anyone out there replaced their stock fuel tank with an after market one? I've seen one on the internet that holds 46 gals. Any advise? Replies to this message: wittsend (May 05, 2008 12:30 am)
#13 of 134 fuel tank by aspesisteve Jan 24, 2005 (10:08 am)
just how many gallons does your current tank hold?   when I bought my '04 F150 it had a 35 gallon tank (factory upgrade) as did many trucks on the lot.   that's plenty big for me
#14 of 134 tank capacity 6.0 ltr deisel by connon1 Jan 24, 2005 (9:18 pm)
04 crew cab with short bed holds 28 gallons. When I got mine I dont believe there was another tank option. I would rather have the larger tank.BTW, paid $2.16 per gal. for last tankful here in NJ.Paying that much almost seems like I have a bigger tank.
#15 of 134 Re: '04 F150 4.6L [aspesisteve] by overkill0084 Jan 29, 2005 (2:45 pm)
Replying to: aspesisteve (Jan 13, 2005 5:15 pm) I did a couple of things on mine (2001 5.4L 4X4) that helped a bit. First go get a K&N filter, not a huge help, but it is noticeable. Second get something over the bed,(dropping the tailgate doesn't help) I put a soft tonneau(?) on mine. Don't forget to check tire pressure as well. Driving from Utah to Washington state, I managed 19 mpg on one tank, though 17.5 to 18 seems the norm (HWY). It still sucks in town, 12.5 approx. Something else to remember as well, the new design, while cool, added around 500 pounds to the truck; this can't help milege either. Take heart though, every Dodge truck owner I've ever talked to has it worse.
#16 of 134 Gas Mileage by larck Feb 11, 2005 (6:14 pm)
I have an F-150 with 3500 miles on it. I get 12.6 to 13.5 in mpg in town and 15.3 mpg on the highway. I think this is in line with what most people are getting ??
#17 of 134 Re: 2004 F-250 Gas Mileage Problem [knmhoffman] by wrightman Feb 21, 2005 (11:17 pm)
Replying to: knmhoffman (Jan 19, 2005 8:11 pm) I have the same problem with my 2005 f-350 crew cab. I get 12-13 mpg normal driving. The best I got was 16.5 when I took a trip to Chicago from California. I only have 8200 miles and am wondering some of the same things. I just met another guy in my town who has an '05 and is only getting 13-14 also. My dealer just told me "You should be getting better than that." Hopefully somthing can be done because I feel cheated, due to misrepresentation when I was buying. Replies to this message: wpalkowski (Feb 22, 2005 7:19 am) pstroke6 (Aug 01, 2006 11:14 am)

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