2008 6.4 fuel milage

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2008 6.4 fuel milage

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Ford Forums >> Ford Trucks, Ford Vans & Ford SUV's >> Ford F-250 & Ford F-350 >> 2008 6.4 fuel milage

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2008 6.4 fuel milage - 8/3/2007 6:23:51 AM

phoneman

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I have a F 350 drw, 4x4 with 4.10 gears how can I improve the miliage. 7-8 towing 14000 lbs, 11-12 driving not pulling at around 70mph. Change the exaust Add a chip? Both? Explosives?

Post #: 1

RE: 2008 6.4 fuel milage - 8/7/2007 11:09:37 PM

Beater

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Most people who have bought the new diesel have the same complaint. A couple took the trucks back to the dealer and had the updates done on the computer and said their mileages improved to the 17/18 range.

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06 F350 PSD I spent my money on Trucks, booze and
79 F250 466 NASCAR, the rest I wasted!
70 Gamagoat
62 Unimog wrecker
85 Ranger Rockcrawler/ 02 tube buggy-Rockcrawler

(in reply to phoneman)

Post #: 2

RE: 2008 6.4 fuel milage - 8/8/2007 2:46:10 PM

shermanator

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Beater, what exactly are the updates for the 08 trucks for fuel economy? And can these be done anytime? My truck is at the dealership as we speak for the 2nd time for a electrical problem. When you step on the brake pedal without a trailer hooked up its telling me i have a wiring fault on trailer like i said 2nd time for this problem. Any idea on this problem?

(in reply to Beater)

Post #: 3

RE: 2008 6.4 fuel milage - 8/8/2007 11:15:46 PM

Beater

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I'm just going by what people have said. The last two times my 6.0liter was in for warrenty work the dealer said there where updates for my computer and they re-programmed it. I assume they did the same for the 6.4 because people tell me their mileages got much better. Call them an tell them about your poor mpg and see if there is anything they can do. Also ask them if you have the most current updates for your vehicle. Not sure about your wiring issue. I don't have the integrated brake controller. Maybe Hayapower will have some answers.

_____________________________

06 F350 PSD I spent my money on Trucks, booze and
79 F250 466 NASCAR, the rest I wasted!
70 Gamagoat
62 Unimog wrecker
85 Ranger Rockcrawler/ 02 tube buggy-Rockcrawler

(in reply to shermanator)

Post #: 4

RE: 2008 6.4 fuel milage - 8/9/2007 8:07:35 AM

nacowboy

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I have a 08 F-350 4x4 with a 6.4L with automatic trans. and 4.10 rearend ratio. I'm having the same fuel mileage problems as others. Just returned from a 6700 mile trip pulling approx. 13000 lbs. I averaged 8.9 mpg. Love the performance but hate the fuel mileage. I have a 02 with a 7.3L and get around 13 to 14 mpg pulling the same load. Any help out there to get better mpg out of the 08?

(in reply to phoneman)

Post #: 5

RE: 2008 6.4 fuel milage - 8/10/2007 6:37:53 AM

the944guy

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I have owned many 7.3L and loved them for their power and the fact that they still get decent mileage under a load. I didnt know that people were having problems with the 6.4 as far as mileage goes.....I thought that was the idea behind the twin seqentual turbos?!?!?

(in reply to nacowboy)

Post #: 6

RE: 2008 6.4 fuel milage - 8/22/2007 7:00:49 AM

Supernitro

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Are their updates? My Dealership has no clue on updates. I really can't see the 2008 6.4 dual turbo getting 17-18 mpg. They delivered mine without est mpg on the sticker. I'm getting 8 towing 16000 lbs and 10-13 on highway, with 3.73 rearend

(in reply to the944guy)

Post #: 7

RE: 2008 6.4 fuel milage - 9/7/2007 1:06:47 PM

milkshake

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My dealer denies that there are any updates. Currently averaging 14.9 mpg. To get this, I never exceed 2000 rpm's. Boy is the truck a dog at low rpm's.

(in reply to Supernitro)

Post #: 8

RE: 2008 6.4 fuel milage - 10/17/2008 2:48:56 PM

Hammerswinger

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I have a ''08 F350 Duelly 4.10 with the exact same issue! (7-8 towing 7ton, 10.5-12 hwy). I have found that I can get about 12mpg at or under 2K rpm. Our speed limit in CO is 75 so I am usually running at 80mph @ 2600rpm and get right at 10.5mpg. I have looked at performance filters (not availble yet from K&N) and exhaust modifications (difficult & expensive with all of the emmision sensors and equip.). I am convinced that the gear is killing the mileage so now I am looking at bolt-on transmissions that add a 6th gear to reduce rpm''s at higher speeds.

Does anyone else know of any other OEM or aftermarket products that are out there?

Thanks.

(in reply to milkshake)

Post #: 9

RE: 2008 6.4 fuel milage - 10/17/2008 4:42:06 PM

Hayapower

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Welcome to the site Hammerswinger..

Have a look at Gear Vendors Under/over setup..

http://www.gearvendors.com/f2wd4s.html

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05 F250 C/C FX4 6.0
1969 Firebird Trans Am
2003 Hayabusa GSXR1300

(in reply to Hammerswinger)

Post #: 10