kenpobuck pretty much hit it on the head. The easier it is for the air to go in and the easier for the exhaust to get out the better fuel mileage. Check out the 6.9/7.3 pre powerstroke section of FTE for all the help you need.

 

Another easy gain in fuel milage is keep the tire pressure up,the difference between 30 psi and 60 psi is likely 2 or more miles a gallon highway.

 

don't exceed the max rating stamped on the tire though. ive been told to run 50 psi cold in my 44 psi rated tires for better mileage. 13 mpg beats a blowout in my opinion

 

and when you fill up, try to use the same pump everytime. dont spoonfill the tank, when it clicks its done. and check your odometer up against the milemarkers over a distance of 10 miles or so.

just so your calculations are correct.

 

To improve mileage, change out the factory exhaust to a 4" from the turbo back and put in an improved air intake like the AIS(factory approved) and the zoodad mod. Also if you have the ZF6 like I do, don't wind it out before you shift. I shift gears around 1800rpm. Also on a diesel to save on the clutch, don't feather it like you do on a gasser, let the clutch out all the way before you hit the throttle.

 

I just recently did a minor trip, with a bad compressor wheel on the turbo. About 250 miles total round trip. Lightly loaded on the way up, maybe 1200 lbs, averaged 11mpg. I'm curious what it'll be now that I've rebuilt the turbo.

 

I have an 02 F350. Right now my overhead shows I'm getting 20.5 MPG. It is usually off a little. I have mostly an interstate drive to work, so around town it won't be that good. The last trip we took with our 5th wheel RV, it got around 12.5 MPG.

An oil change is going to cost you at least $70 if you do it. I just spent almost $1000 on an oil line replacement, fuel filter replacement, and oil change. In other words, everything will cost more with a diesel. When I bought mine, diesel was about .25/gallon cheaper than gas. That changed about a week later. Right now in my area, diesel is .40 higher. My chevy only gets 17 MPG with the same driving. And it won't tow 10,000+#. But I can do most cheaper - plus I don't mind tearing it up on the 40 trip to work every day.

 

68K miles. Retired finally and planning on taking the 5th wheel around the country. Mileage could be better. I am a steady 2k rpm driver. Was told there are chips that can improve my power and also my gas mileage. Is this true and is it worth looking into.

 

Hypertech is just a few blocks from my house. I've heard they can just do a reprogram and give you better mileage and power. I haven't heard if anybody has taken them up on it. I've always tried to factor the cost of a tuner and the savings it would bring. So far it doesn't seem like a good cost justification if you go with a reputable company and their better tuners. Most buy them just to have the options.

 

I average about 20 mpg with the diesel Bronc.

 

Hi Guys

I am fairly new to the Ford club, and have bought a 04 F250 CC 7.3PSD.
I am located in Australia.

Down here we are paying $6.00 per 4 litres ($5.70 per US gallon), so mileage is important.

Has anyone installed manual front hubs, so you can disengage the front hubs. This should increase mileage a small amount as you would not be turning the front axle and diff.

Any thoughts??

Thanks

 

I have always had manual hubs cause you can always count on them to go in but I am usualy stuck when I need to go into 4wd and have walk through the crap to turn them. Locking the hubs costs 1 to 2 mpg and going into 4wd costs about 4 more so 5 to 6 differance from 2 to 4wd.

 

Thanks CornTruckDriver, you have convinced me to try some manual hubs. Even if it helps only 1 or 2 mpg, then that would be a help. Obviously more the merrier.

Thanks

 

When my hubs are disigaged and the lever in the cab is in 2wd then the front end doesnt turn at all and is totaly disinguaged. Is yours ? if it is then you may not see the difference My hubs say Lock and Free up here Auto hubs say Lock and Auto

 

My hubs say Lock and Auto, so they are auto hubs.