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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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#113 of 355
Re: 2008 Performance Drop [scarab36] by awayfromdinoil
Oct 24, 2007 (8:06 pm)
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Replying to: scarab36 (Sep 28, 2007 5:44 pm)

TRY CHANGING FUEL& AIR FILTER FIRST NO LOW END POWER ON PLUG FILTERS.ORE THE LOW END TUBO IS SHOT.SAME PROBLEM ON 06. #2 ADD AMSOIL DIESEL CONCENTRATE ADF-CN THIS WILL CLEAN THE TOP END. THIS WILL TAKE ABOUT 2 WEEKS TO SEE THE DIFF.#3 THEN ADD 4/40W AMSOIL DIESEL MOTOR OIL DEO-1G + THERE FILTER A MUST.THE DRAIN INTRIVELS ARE WAY HIGHER THAN 15K.I HAVE DONE THIS FROM 1997 FORDS AND UP.MILAGE WILL GO UP BY 1.5
#114 of 355
fuel milage and performance by dbweaver
Oct 28, 2007 (5:45 pm)
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I now have 4516 miles on my 08 f250. I just made a 750 mile trip hauling a 2800lb load of tar and towing a 3500lb Crafco melter. I averaged 10.1mpg. The truck computer is showing 14.
 I would really like to know where the 350hp and 650lb of torque went. My 1999 7.3 liter f250 with the same gear,and same load will eat this thing alive and still get 15mpg. This is real world highway driving,75 to 80mph.
 Could anyone tell me what happened to all the power this 6.4 is supposed to have? Thanks
#115 of 355
Re: 2008 Performance Drop [scarab36] by bfordtough
Oct 29, 2007 (1:45 am)
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Replying to: scarab36 (Sep 28, 2007 5:44 pm)

I was interested in buying a Super Duty with the 6.4L Diesel, but I have been very nervous about there fuel mileage, I had read in a magazine they tested one and got 18 mpg, and 15 in the city....My friends 6.0L gets 17mpg, and his Cummins gets goods mileage...I was wondering if anyone had some mpg ratings for the 6.4L if there terrible, ill just purchase the 5.4L king ranch F-150. but i guess you can always put a chip in it, or a air filter and exhaust on the diesel and help your mileage
#116 of 355
Re: 2008 Performance Drop [bfordtough] by buyer2008
Oct 29, 2007 (6:38 am)
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Replying to: bfordtough (Oct 29, 2007 1:45 am)

I have just over 4100 miles (about 3/4 of that is highway mileage)on my 2008 F-250 6.4L Lariat CC. I have the 3.73 axle. I have the optional 20" wheels/tires. I put an Access tonneau cover on the short bed. I rarely exceed 2,000 RPM. I rarely exceed 70 MPH on the highway (Have heard that over 70 MPG drops significantly). I have verified my mileage by hand, and continually monitor the dash meter as well (they are pretty close). I have yet to tow my trailer with the truck. I am getting 16.2 MPG on the highway, and 13.2 around town (My around town mileage is extremely short trips...many less then 2 miles. Highway MPG has been increasing with increased mileage on the truck (current range is close to 500 miles per tank of fuel). Around town seems to remain pretty constant.
#117 of 355
Re: 2008 Performance Drop [bfordtough] by mschmal
Oct 29, 2007 (6:45 am)
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Replying to: bfordtough (Oct 29, 2007 1:45 am)

Do not chip, exhust, or do other MODS to this engine.
 
People are complaining about the 6.4L's fuel economy because they are letting their EGO instead of their NEEDS determine how big a truck they buy. Even if you get great milage from your 6.4L the diesel still costs 6k extra which you will never see again unless you keep the truck forever and put over 18k per year on it.
 
Mark.
#118 of 355
Re: 2008 Performance Drop [mschmal] by fordguy7
Oct 31, 2007 (6:23 am)
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Replying to: mschmal (Oct 29, 2007 6:45 am)

I have seen you in other entries have very strong opinions about people buying the diesel when they don't have to, and I agree with you.
 
However, I cannot seem to get any mileage info on the Ford F-250 Crew 7.3L V-10 gas w/4.10 axle. The loads I pull struggle with the 5.4L V-8 gas w/4.10 axle, which I have now. I like the idea of the V-10's price, quieter sound, fuel type, and power potential, but 10 cylinder mileage scares me because I keep trucks a long time. I've heard rumor the V-10 mileage is not sub-10 mpg and close to the V-8 gas mileage because it does not have to work as hard to move that big mass, but that may be a rumor only. Do you have any opinions on this or mileage data on V-10?
 
Thanks in advance!
#119 of 355
V10 milage. by mschmal
Oct 31, 2007 (10:41 am)
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A sales person at my dealership says he gets 16mpg on his 6.8L V10.
 
Mark
#120 of 355
Re: Mileage Update [tunaboat] by mholmes1
Oct 31, 2007 (7:56 pm)
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Replying to: tunaboat (Aug 16, 2007 8:44 am)

Look out boys and girls. Their all going to have converters as big as trash cans, like the 2008 ford. Have heard you can modify the converter, will find out more in the future. Hey, took mine to ford dealer said what you got is what you get. They don't give a *%* after you buy it.
#121 of 355
New F-250 by devildog88
Nov 01, 2007 (11:18 am)
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I bought a 2008 6.4 lariate F-250, short bed, 4X4, 20" wheels, 3.73 gear and fully loaded! I understand everyones concerns about whether or not to go diesel or gas, but I can tell you first hand "This truck is the real deal". The fuel economy changes from fair to great depending on how I drive that day, or by how much I may be towing but with that aside I can tell you this new 2008 makes the dodge, chevy, toyota, and nissan look like %&#*! All of my friends drive the other make trucks and I've driven them all and the only one that even compares motor wise is my buddy with the new 2007 6.7 liter dodge (makes great power), but the comparison stops at the engine becouse the rest of the truck is crap! And lets be honest with each other, when you spend $50,000 on a vehicle yeah the milage is important but definately not a deal breaker! I had a 2003 before this and the difference is night and day! I dont think I'll do any performance upgrades simply because Ford has smartened up a bit and realized people were doing all these mods and teraing the vehicles up prematurly. I'm from Florida and drive about 150 miles a day for work and I pull my 5000lb farm tractor back and fourth to my hunting land in GA and every once in a while I'll get into some deep clay trying to navigate through the property and I'll put it 4 wheel high and the truck doesnt breathe hard with clay up to the bumper. I have pics of me pulling out another guy in his new Toyota tundra that he swore by just thirty minutes before getting pulled out by my 2008...
This truck has several new upgrades from the previous years and I can a lot more pros than cons not to mention pulling up to the light and having all the other truck owners (dodge, chevy, toyota) checking your truck out....
They know the deal!!!
 
Mike
#122 of 355
Re: 2008 Performance Drop [fordguy7] by fordtoys99
Nov 02, 2007 (10:13 am)
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Replying to: fordguy7 (Oct 31, 2007 6:23 am)

i have a 99 f350 w/ the 6.8l v10 it has 173,000 miles on it . i avg 12-13 normal and 17 on highway still. run full synthetic oil and keep up on maint, it will run forever

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