To the guy with the magical 30+MPG Excursion

[J.D.]

I know somebody out there a while back said they had a 7.3 Excursion getting something like 30+ MPG. I need your help. I have a 2000 F250, ext cab, 4wd, 6 speed. Cold air intake, 5'' exhaust, Banks 6-gun tuner. I cannot break 20MPG, highest to date is 19.1.....I've tried everything. What did you have done to yours, to take a truck that weighs 1500+ more lbs than mine and get 10+more MPG?

[brapp]

i have a 03 6.0 crew cab 4x4 long bed gettign in the high 20's but have recorded as high as 31 on long trips

[SYKO]

wtf man My 99 f-250 with the 7.3 was in town over 20 and triped out close to 30, but it was also a 2wd day cab longbed

[Thorpe]

Gear ratio different?

[LonesomeTriZ]

Man even my older 7.3 with those huge and heavy 22.5 rims gets 20. Something is wrong some where.

[deathman53]

I have a 97 7.3 350 dually it has real low gearing(4:10), I get 14-18mpg. Pulling my 4 ton trailer, 10-12 mpg. I'm told when the inner-cooler and different type turbo was added power and fuel mileage when way up. I wish mine got that good of gas mileage!!! 20-30 mpg, I would drive that more often, my 4 cylinder pickup only gets 23 mpg.

[smokinwrench]

My parents have a 01 f250 7.3 auto 4x4 crew cab, it has some sort of chip and it gets 18-19.

Guy I work with says his with some sort of chip gets about 30 all the time, I guess the programmer show mpg. I asked if he has ever checked it with miles compared to gallons and he said he hadn't, so I have my doubts. I will ask him what the chip is tomorrow.

[300rman]

that'd be me.

K+N intake,
4.5 inch straightpipe exhaust (not banks)
Evolution Programmer

All i know of for sure, No clue what else dad has toyed with. lots of banks parts have gone on and been taken off, mainly due to the truck not coming up to temp in the winter, so i couldnt tell you what is still on there and what isnt.

key is driving style. drive nice, and keep it under 2 grand down the highway.

[deathman53]

keeping it under 2g on highway isn't in the cards for me, I'm humming at 2g's at 50, 55 is just over 2g's and 65+ is close to 2 1/2g's, the fastest I went is 80 and it was screaming, it had to be 2 3/4 or closer to 3g's. I read that different rear end's were available, that and tire size will make a big dfference, along with mine is a 3 speed w/ overdrive. Didn't some have 4 and 5 speeds w/ overdrive?

[4cfed]

gear ratios will make a huge diff!! and driving style... taken it easy gettin up to speed, and easyin up to speed aproching a hill, and coasting down the hill...

[300rman]

keeping it under 2g on highway isn't in the cards for me, I'm humming at 2g's at 50, 55 is just over 2g's and 65+ is close to 2 1/2g's, the fastest I went is 80 and it was screaming, it had to be 2 3/4 or closer to 3g's. I read that different rear end's were available, that and tire size will make a big dfference, along with mine is a 3 speed w/ overdrive. Didn't some have 4 and 5 speeds w/ overdrive?

just under 2g for our truck and its rollin about 78MPH on the speedo. the tires are bigger, and the speedo isnt compensated, so its probably closer to 82.

[J.D.]

Just for a little extra info, I have 3.73 gears, and 285/75r16 tires....the tires themselves may be a little taller than stock but with the 16x10 wheels they even out, per GPS my speedo/odo are within 1mph/ and very close on mileage.

I still just can't see y'alls claims. You think mine is bad, my buddy has a 99 350 crewcab longbed, 6'' lift, 37x13.50x17's, 6 speed w/3.73s, same mods as mine....he gets 11-14 with his. I actually found with mine it's better to accel moderately, lugging it alot seemed to take more fuel and just raise EGT's needlessly. This particular forum here is the only one where people are making such ridiculous claims. I've been all over Powerstroke forums and have never heard such crazy mileage claims.

Lonesome, probably a good explanation for yours is you have an OBS if I remember right, between a 15 degree HPOP and single-shot injectors they are better for overall fuel economy. I'll trade you my split-shot injectors for your singles if you want

I'm looking into getting either a DP Tuner or Tony wildman chip sometime in the future and get rid of this Banks trash. They both have "economy" tunes, maybe once I get them I'll be able to report back with something in the 20's...

What gear ratio do you have in that thing 300r? If I'm not mistaken 3.73 was the lowest offered?? Every Superduty I've been in(with 3.73) is 2,000RPM=70MPH. Maybe you have 3.55's??

[harryredtrike]

I have a 97 7.3 350 dually it has real low gearing(4:10), I get 14-18mpg. Pulling my 4 ton trailer, 10-12 mpg. I'm told when the inner-cooler and different type turbo was added power and fuel mileage when way up. I wish mine got that good of gas mileage!!! 20-30 mpg, I would drive that more often, my 4 cylinder pickup only gets 23 mpg.

thats what my chevy silverado gets exactly.has tow package with a low gear,not much you can do with that.i have the 5.7 vortec extended cab.

[smokinwrench]

He says its a hyper tech power programmer 3 he says its an old one. He swears his mileage is that good. With a Bully dog monitoring system.

[The Goat]

I propose that you go onto the websites for the 7.3... Most people don't see mileage over 22 and that's with pizza cutter tires.

this magical high figures are just that....magical.

Only reason I'm not rolling in a 7.3.


With the intercooler off of a 6.0 and a 80hp tune most see high teens.