Well it not looking good on me getting the truck. The money is just not coming up. So I'll be sticking with my dent side.

 

Geez....I don't feel so bad now seeing this data. No need to upgrade to newer models, you would never make back the initial cost. My 86 4x4 F250 with a carbed 7.5 does 9 mpg and so does my 12,000 lb Class C motorhome with the EFI port injection. I'm talking highway miles of course.

 

Mines not an SD but my '06 SCab, 6.5' bed 5.4 3V, 3.73 rear, 265/70R17, 3" single ex, Volant CAI, and Edge Evolution gets about 13.5 in town, and about 17.8 if all highway. 77K miles and I drive like a country boy (both feet flat on the floor)

 

02 E350 van, 5.4l, usually about 11, last trip included lot's of 70-75 interstate and still got 11. I do a lot of idling though, charging batteries, heating and cooling it since it's somewhat of a camper van at this point. Just bought a Scanguage so I'm hoping to monitor it more closely.

 

Grantman, how do you like that Edge tuner? Could you notice a big difference in power and fuel econonmy?

 

I'm getting about 18 on the highway. 12 in the city if my foot is easy on her . Got my '08 superduty 5.4L from Texas Direct Auto and a few days later put a K&N CAI and tuned with DiabloSport Predator. Magnaflow Dual Exhaust is on now and next is a high flow cat. Definitely satisfied with performance and MPG .

 

I am new and just got my truck a year ago.. I get 18 highway and 16 city. It is lifted 9 inches with 355/60R20 nitto terra grapplers. it has the 355 gears, cold air, electric fan conversion, exhaust and manual locking 4x4 hubs. it has been a great investment for me. i tow ocasionally but not often..

 

I LOVE it!!!
When first installed it felt like I dropped a bigger engine in, instantly went up about 2 - 4 MPG. I also noticed that it accelerates madly! I'm getting 0-60 in 6.76 which ain't shabby for a pickup. I drive like a country boy (both feet flat on the floor!) and I still get better mileage than babying a stock truck ( I drive one just like mine at work sometimes and it only gets about 10.2 on a good day. All in all it's the best mod I've done as far as effect for the dollar. That said, if I had to do it again I would have started with a Gryphon, it's an Evolution that's been modded to have more than 3 settings (like mine only has Economy, Towing, and Extreme), plus their custom tunes are cheaper, they also take a little longer to get it back to you, but worth the wait. Now I have to send mine in to have it upgraded into a Gryphon, that's gotta wait until my Harley's back on the road - I'll save enough in gas every month to pay for more mods.

 

The truck in my Sig gets 12 city 14 hwy. I gues the 4.10 gears and manual trans helps with the 35's. Also its a reg. Cab with a fresh 5.4l.

 

I have a 2002 F-250 with just shy of 200k with the 5.4. I am the third owner. Original owner, and most of the miles, was a fleet operator.

I drove from Milwaukee to Minneapolis a few weeks ago. I hit just shy of 14.5 mpg. From a practical standpoint, the entirety of the trip is interstate. I averaged, other than construction zones, around 72 mph with significant fluctuations in speed. (Cruise needs to be fixed.)

The truck has a small life and much larger than stock tires. Other than that it is stock.

 

13-15 unloaded.
Never less than 11 loaded. I tow about 5700lbs

 

Now I don't feel so bad. I have a E350 15ft box truck,5.4,only mod is K&N air filter empty(9000lb) or with a 3000lb load. If I keep in under 65mph I get 12mpg,but never drop below 9mpg and that doing 75 to 80 loaded.
I'm think of taking the cat off and running a straight pipe anybody have any input?

 

Same truck but 2010 and the exact same numbers. 26K miles
Averaged 9.15 towing my 8200lb travel trailer 4700 miles last summer.

 

Ethanol make a big difference in MPG. I see a good 3 MPG bonus if I get real gas. Mine is a v10 so I will not say what I get.

You need to look at when comparing MPG.

 

12 city... sometimes... kinda