What is your Fuel Economy?

[fasteddie]

Let me know what you did, I'll be experimenting with my truck too. One thing I noticed was that on the vacuum guage on the air filter housing, it was more than half way down, with a brand new air filter. It is starving for air. I am also talking to MBRP. the 5" exhaust will be available next week. they are also working on a straight pipe. if we are going to get this crappy fuel economy, I no longer need a particulate filter or a cat. a company is working on deleting regeneration mode from the computer. I'll talk more later

 

[fordtrucker4life!]

I know there is a huge difference in these 08 trucks compared to 90's trucks, but I have noticed with larger gear ratios such as 4.88 or 5.13 that the fuel mileage stays constant in whatever you do. I have trucks with 460 gassers that get the same mileage towing as they do on their own. My portajohn pumper is a 97 F450, 460 gas with 4.63 rear gear. It gets 6-7 miles to the gallon driving with out trailer and fully loaded with 16 johnnies it gets 6-7 miles to the gallon.

 

[iracemine]

subbing

 

[battinthecat]

With at 3 bucks/gal I felt I didn't have much choice. Traded my 08 in for a new 07 550. My truck joins 3 other used 08's on the lot.

 

[powerstrokeguy]

wow...ya know ive already noticed some 6.4's on the used gm lots...why in the world are they gettin such bad fuel mileage compared to the other two??

 

[powerstrokeguy]

you know (i realize mines a cummins) but its takin me 50,000 miles just to see 15 mpg hwy...mines a 3'4 ton 4x4. i dont think your doin to bad...

 

[powerboatr]

wow...ya know ive already noticed some 6.4's on the used gm lots...why in the world are they gettin such bad fuel mileage compared to the other two??

i saw two gm duramaxs at my dealer today traded in on 08 ford chassis cab 450's

love them gm tailpipes , BAAAAZOOOKA

 

[fordtrucker4life!]

i saw two gm duramaxs at my dealer today traded in on 08 ford chassis cab 450's

love them gm tailpipes , BAAAAZOOOKA

I was laughing my arse off when I saw that stupid spud gun. OMG that is the best they could make? I would rather have the Ford dual split.

 

[fordtrucker4life!]

The F450 and F550 trucks are designed to haul an extreme amount of weight for their fairly small size. The GM 4500 and 5500 trucks haul the weight of a Ford and they are significantly larger. The fuel economy on GM 4500 and 5500 are probably close to that of a Ford if not worse. IMO the gear ratio being a 4.88 is what is not helping the fuel economy, but if you need to haul something the truck will handle anything you throw at it.

 

[02SilverStroke]

The GM 4500 and 5500 trucks haul the weight of a Ford and they are significantly larger.

Personally, I think that GM's design was a stupid move, to make the 4500 and 5500 identical to the larger trucks. But that's okay, it's to Ford's advantage I guess. Does anyone remember in 50's and 60's when Ford's F-500's through the F-750's cabs were identical to the F-100/250/350 cabs with the exception of larger fenders and running boards? It's a marketing strategy or "whatever floats their boats". Can you imagine the 450/550 cabs being similar to the 650/750 cabs? Sorry to get off the subject...