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2008 Ford Super Duty

355 messages,  Last post on Nov 13, 2009 at 9:21 AM

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What is this discussion about? Ford F-250 Super Duty, Ford F-350 Super Duty, Truck


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#204 of 355
6.4 mpg by dbweaver
Feb 28, 2008 (1:15 am)
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I have an 08 with 15,000 miles on it now. 13 mpg is mostly what I get. I have saw 15.9 at 65mph on a long road trip and 10.4 with a small load. I have 373s
#205 of 355
Re: I want my MPG [albright] by scarab36
Feb 29, 2008 (6:37 am)
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Replying to: albright (Feb 26, 2008 5:30 am)

I looked at the 08 dodge and chevy stuff over on Edmunds.com, looks like they are in the same boat (or worse) as far as mpg.
#206 of 355
Re: I want my MPG [scarab36] by fordguy7
Mar 03, 2008 (6:31 am)
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Replying to: scarab36 (Feb 29, 2008 6:37 am)

......and the bad thing is that it doesn't look like fuel prices are getting any better. I know there are diesel diehards out there who won't agree no matter what, but the V-10 gas engine is looking better than the diesel all the time. In Florida, diesel is $0.40 to $0.50 more per gallon than gas. The diesel engine upgrade is about $6K more than the V-10 gas engine. Maintentance (oil changes, etc.) are also more expensive with diesel. Combine those factors, that's quite a financial difference and payback period to go diesel. Then, when you consider the relative quiet, throttle response, and performance of the V-10, not to mention that it's been around for a while and presumably has been "debugged" (unlike the diesels), it seems like a no-brainer. Unless you need the extra towing capacity the diesel provides, I'm not sure why you would go that route.
#207 of 355
Re: I want my MPG [fordguy7] by jarmentrout
Mar 06, 2008 (10:14 pm)
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Replying to: fordguy7 (Mar 03, 2008 6:31 am)

I am a believer in the V10. I tried the 5.4L V-8 for a short period in the F-250 and quickly moved to the V10 when rebates and family pricing hit in 2005. I did not care for the 6.0L PS at the time, and seems to be a good decision for me. I can assure you fuel economy is not good with the V-10 either. I have a fairly rare 2005 F-250 Blue Harley which is a beautiful truck, but the mileage is about 10.5-11 in town and 12.5-13 on the highway depending on how much I put my foot in it. I tote 500-600 extra pounds everywhere I go. The 4.10 rear end (only one you can get with the V-10) does great until you pass 70...then the tach really starts to creep as one might expect. If you stay beween 55-65, it does great. The motor is smooth as silk and quiet for the most part and does pretty well towing, but the economy drops quickly as you approach 10K lbs. I have about 56K on the motor and had to replace the throttle body, battery, and alternator so far. I have been looking hard at the 2008's, but I don't like what I'm hearing considering the MSRP of the one I want is $56K. Darn thing better be perfect and drive itself! Doesn't sound as bad as the 6.0L PS, but still not good for that kind of money. The V-10 is clearly not as strong as a well tuned diesel, but it is still a $600 option vs. $6895 Given the ridiculous cost of diesel, and the limited improvements in fuel economy, maybe I'll hold out for the 2009 and see if things improve. Oh yeah, I have a AFE Cold Intake Kit and a Diablo Sport programmer and it helps performance abit, but not fuel economy despite vendor claims. Good luck!
#208 of 355
Re: I want my MPG [jarmentrout] by fordguy7
Mar 10, 2008 (6:28 am)
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Replying to: jarmentrout (Mar 06, 2008 10:14 pm)

Thanks a lot for the response. It's just helped confirm the way I was leaning. It's taken me a while to get some real world input on the V-10 gas mileage, as so many people go with the diesel or the V-8 gas. The mileage doesn't surprise or scare me. In fact, it's about the same mileage I have I get with my F-250 4 x 4 Crew Cab with 5.4 liter V-8 and 4.10 axle ratio. This confirms what I have been reading, that the V-10 gas mileage is about the same as the V-8 gas mileage because the V-8 motor has to work harder/rev higher just to move the mass of that truck body down the road.
 
My friend has the 2005 6.0L PS, and says it's a dog compared to the 7.3 liter diesel they had in the older models, so you made a good choice. He tells me his next truck is without a doubt going to be a V-10.
#209 of 355
Re: I want my MPG [albright] by contractnow
Mar 14, 2008 (4:02 am)
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Replying to: albright (Feb 26, 2008 5:30 am)

Hey, I'm new here looking to improve my mpg. I have 2008 F250 and getting 8mpg. Can you help me. I see you used a chip. Where can I get one and how do you put it in? Please tell me anything else I can do. Thanks for any help, I need it.
#210 of 355
My MPG by firecapn
Mar 14, 2008 (5:00 am)
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Just recvd my new 2008 Ford F350 C/C, PS, L/B 2WD, and with the first tank of fuel averaged 14.1 mpg. I'm half way through the second tank and I'm up to 14.5 mpg. I' looking forward to towing my fifth wheel in early April to see how it performs. Will report after the trip.
#211 of 355
Re: I want my MPG [bkuepaint] by dbweaver
Mar 15, 2008 (5:36 pm)
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Replying to: bkuepaint (Feb 26, 2008 5:11 am)

What kind of chip did you try? What kind of troubles did you have with it?
Thanks, David
#212 of 355
Re: I want my MPG [dbweaver] by bkuepaint
Mar 15, 2008 (6:28 pm)
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Replying to: dbweaver (Mar 15, 2008 5:36 pm)

I used the Hypertech for the 08 Ford F250. What happened was my turbos overheated and shut the motor down. That was the 1st thing. The 2nd thing was it changed my shift points and had the transmission running horrible. I also lost gas mileage
#213 of 355
Re: 6.4 mpg [dbweaver] by contractnow
Mar 16, 2008 (6:31 am)
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Replying to: dbweaver (Feb 28, 2008 1:15 am)

David, how are you getting 13mpg? I also have an 08 I just bought used and I see why. I only get 8mpg. Are you doing anything to get that mileage? Air intake? Chip? I have mixed feelings about both. I'm new to these modifications and don't know anything about them. You sound knowledgeable. Can you or anyone else suggest anything that works without causing problems to my truck. Thanks Gary

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