7.3 Excursion Fuel Mileage - Ford Powerstroke Diesel Forum
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post #1 of 31 Old 09-14-2013, 07:34 PM Thread Starter
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7.3 Excursion Fuel Mileage

Hello,

I'm looking to buy a 2003 7.3 Excursion 4x4 Limited. Was wondering what people are seeing for MPG. I have a 2010 F-350 that gets at least 16.5 on the highway for comparison purposes and that I will keep but want to ensure this Excursion gets at least comparable mileage. Thanks.
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post #2 of 31 Old 09-14-2013, 07:50 PM
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Too many other variables there, like gear ratio, mods, driving habits, etc. My 7.3 F250, with 3.73s, stock wheels and conservative tires on high air, muffler delete, and always clean filters, with truck box full of tools and a couple of atvs will still get 16-17 locally and up to 23 on the open road. But the faster I go, so goes my fuel and my $$$. When my wife drives it, the numbers are shameful.

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post #3 of 31 Old 09-15-2013, 01:48 PM
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I was seeing about 18 on hwy but I haven't really taken full freeway trips to get a true hwy mileage. City I'd norm get 13-16 but its hard for me not to floor it.

2000 Ford Excursion Limited 4x4 Diesel
2007 Jeep Wrangler unlimited on 1 tons & with 41.5" Pitbull Rockers
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post #4 of 31 Old 09-16-2013, 01:11 PM
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i get 13-15 around town and i just got back from a long freeway trip that i got 18.3 with the ex

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post #5 of 31 Old 09-16-2013, 01:50 PM
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Since I did the ZooDad mod (along with 6637) air filter upgrade mod - I get about 15 in the city, and 75mph (right at about 1900 RPM) I've come close to 23mpg on the freeway.
For that number though - I was driving at night, so cooler air and some good long straight aways, No drafting or hyper-mile'ing behind semis either.

Also have a 4in. exhaust from the turbo out.
Everything else is stock.


2003 EX, 7.3L 4inch Lift, Nitto Trail Grappler's, KMC XD Spy's
220k Miles, Currently 605tq, 312hp

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post #6 of 31 Old 09-16-2013, 03:54 PM
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Quote:
Originally Posted by AzPatMan View Post
Since I did the ZooDad mod (along with 6637) air filter upgrade mod - I get about 15 in the city, and 75mph (right at about 1900 RPM) I've come close to 23mpg on the freeway.
For that number though - I was driving at night, so cooler air and some good long straight aways, No drafting or hyper-mile'ing behind semis either.

Also have a 4in. exhaust from the turbo out.
Everything else is stock.
Was that with or without the 6 position chip?

2000 Ford Excursion Limited 4x4 Diesel
2007 Jeep Wrangler unlimited on 1 tons & with 41.5" Pitbull Rockers
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post #7 of 31 Old 09-17-2013, 07:12 AM
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That was without - I didn't get the Ts chip installed until this summer.
Also to note - I didn't use the cruise control either - I noticed about 2 to 3 mpg loss when I used it.


2003 EX, 7.3L 4inch Lift, Nitto Trail Grappler's, KMC XD Spy's
220k Miles, Currently 605tq, 312hp

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post #8 of 31 Old 09-17-2013, 08:22 AM
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I'm getting 15 to 17 around town and on a recent trip with the cruise set at 63 and some 73 I got 21.5. Taller tires on 20" rims, Dp chip in eco, bigger turbo. Stuff like that. I'd love some hybrid injectors and new tuning if i could find live tuning in Michigan!
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post #9 of 31 Old 09-17-2013, 08:32 AM
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That was using the trip set on the Gps and over almost 800 miles. Gotta love the 44 gal Ex fuel tanks.
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post #10 of 31 Old 09-17-2013, 08:54 AM
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Quote:
Originally Posted by AzPatMan View Post
Since I did the ZooDad mod (along with 6637) air filter upgrade mod - I get about 15 in the city, and 75mph (right at about 1900 RPM) I've come close to 23mpg on the freeway.
For that number though - I was driving at night, so cooler air and some good long straight aways, No drafting or hyper-mile'ing behind semis either.

Also have a 4in. exhaust from the turbo out.
Everything else is stock.
1900 rpm? Is yours 2wd or gearing not stock? Because mine runs at 2200-2300 ish rpm when I'm doing 75.

One more to throw in here I got 27mpg one time towing my jeep drafting behind a big rig doing 57 mph I think it was 1500-1600 rpm

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