97' F250-LD

iTrader: (1)

When I first got my truck about 6 weeks ago it was bone stock under the hood. It got 13 mpg. I make sure it gets a fresh Fram Tough Guard and do the Gott's mod. Still gets 13. I just put a straight pipe on it and haven't ran a full tank through it yet to see if it's changed any. I still have to change the oil and I'm guessing new plugs couldn't hurt, but before you ask, yes, I've been driving like a grandpa for acceleration and only doing 50-55 mph knowing this thing isn't a Honda. It is a F250LD with a 5.4 but event the EPA says 16...

97' F250-LD

iTrader: (1)

Also, I switched from a 265/70 to a 245/75 17 with no change either and I drive about 90% highway. It seems like everything is in place for optimal mileage but I'm obviously not done

Tackle

Gotts mod will not and should not increase mileage. I have yet to see 13mpg in mine. 12.1 has been the highest.

Truck Norris

I got like 14.8 on the free way trip home with mine. Last fill up I got 9 due to letting the truck warm up so long so often. Could this play a part?

mawk

On the freeway i average about 16.4 our around there (top it off, reset the trip, drive, when it comes time to fill up again, take the mileage and divide that by the gallons filled.)

If i drive like a grampa, i could squeeze 18 or so...that's really babying it though.

4x4wolf

I get 16 on the highway with my 5.4 and 12 to 13 in town.

Almighty

Smaller tires make your RPMs higher thus making your truck work harder on highway miles. Also its a f250 with a f150 motor so of course your going to get worse gas mileage then somebody with a f150 with the same motor.

By the way I averaged 18 mPG when I drove to the florida keys a couple months ago, averaging 70-75 MPH. (roughly 200 mile drive 1 way)

TrdLtly

Lot's of variables control MPG. Altitude, acceleration habits, hills, cruize control, tire inflation, alignment, tire quality, o2 sensors, etc. One other thing that is often over looked is the winter vs summer blends in different states: http://www.popularmechanics.com/cars...rence-13747431

It makes it tough to compare mileage from one another because of all these variables. If mileage is really a concern then go get a smaller truck or car. If you just want to get what you can out of what you have then take the advice of the Ecomodders that make it game to get what they can out of their vehicles.

The Scangauge2 is a great device to help you monitor your right foot. Been using one for years on my Superduty's and now on my Lightduty. Great tool to help you figure out what works for you. Apples to Apples.

Collin

13mpg in a 4x4 in the WINTER is reasonable. I get 11-13mpg hwy in the winter and 15-17 in the summer. This can change due to air temp, poor fuel, windage, etc..

97' F250-LD

iTrader: (1)

I know the od of the new and old tires are the same as oem, just that I've heard the more narrow tread section will help with mileage. I keep everything in tune as much as possible, granted I just got the thing six weeks ago so I'm still going through my checklist on a limited budget. My guess is most of it is due to winter conditions and **** fuel, these Tritons seem to be picky about everything. Thanks for the input though, if other people have similar experiences then I guess I'll just do my best to maximize it. Not getting a different rig, it was inherited...