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Discussion Starter #1
Hello all, previous Cummins owner, and 7.3 newbie here.
22.417 is the best MPG I got to date on the 2003 4X4 eXcursion, Before today the mileage was bad bad bad, I've owned the truck for 2 months and got 14.5 15.5 and one 200 mile drive @ 20.5, until my water pump went out 2 days ago, and ever since that the MPGs have jumped way up, Could the Faulty/Bad water pump have been causing the bad MPGs? Causing the motor to work harder losing MPGs? The water pump pulley was almost impossible to twist with my hand, hoping that was the culprit for my bad MPGS.
Thanks all.
 

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interesting
yes drag on an engine will rob you of potential power and mpg, water pump is a big power sucker because its pushing gallons of fluid...when the bearing goes south..well its just that much harder to turn

We have a 01 Excursion 7.3 4x4, best mpg I have seen is 15.9mpg, it was getting 14.2 when we got it. I live at 9000' we drive lots of highway, but 22.4 would be awesome! I wonder if something is wrong with my excursion LOL
 

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Discussion Starter #3
410, I also have a DP tuner the small one with 5 levels, my Diesel journey began with a MBZ 300TD 4 door and I never looked back since, 98.5 Cummins 12V, 01 24V, 02 Jetta Wagon TDI and now the 03 7.3
The key is to keep it under 70 and not Romp on the go pedal which is hard for me to do, but I went to sleep last night with a smile knowing I got good mileage. Maybe the tuner is helping the MPGs I'm going to be selling the tuner soon so I can get the one with a monitor. If you're interested lemme know.

Joe.
 

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I am getting ready to make a big purchase from somebody, possibly DP
I am looking at a new HPOP, injectors, chip, gauges/tuner and to go intercooled all at once, but its for my 97 F350 not the 01 excursion. Our excursion has some existing upgrades, I am not sure of all of them as it was done by two owners ago. I know it has down pipe, 4" exhaust, gauges and it came with an old Hypertech programmer... it likely has internal turbo upgrades as well it sounds awesome and hauls ass. It runs so good that we will focus on some other upgrades on this truck like cosmetic and suspension, I may re visit the excursion 7.3 down the road. Right now the wife is just driving the ex and I keep doing oil changes and run some injector treatments through it. I have been eyeballing Skyjackers 6" excursion lift all spring, I know my wife would LOVE that, we lift everything....


When you do sell your DP 5 position post it up here, I may just nab it :) all depends on where my truck budget is at that month
 

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Discussion Starter #5
Sounds good and thanks for the advice on the help to sell it, I almost forgot about the forums for selling items, it's been a while that I've sold takeoffs.
I've been using sea foam in the tank with fill ups lately, hopefully I can lubricate some moving parts and get better mileage than I get now, hopefully the new monitor doesn't kill it 😔
Take care bud.
 

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Discussion Starter #8
I use sea foam, is diesel kleen any better for the 7.3's? I'm guessing the silver not the white?

I got my first full tank hand calculated mixed driving @ 17.6 however the original posting was a straight freeway shot on 220 miles from on ramp to off ramp.
 

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I can get 23 mpg on the highway with my '96 F250 if driving in the 55 - 60 mph range.

At 70 mph I usually achieve around 21 mpg.

Towing a 27-foot travel trailer, my mileage averages 14 mpg.

I've got an automatic with a 3.55 differential, so the engine rolls over at a leisurely 1500 rpm at 60 mph. My truck has a fiberglass bed cover.

I've got no chips or programmers any other such improvements that would enhance fuel mileage or power, but I have enhanced the exhaust system by replacing a flattened exhaust down-pipe that was shoehorned onto the original 7.3 Powerstroke trucks.

These ole 7.3 beasts are able to achieve excellent mileage, especially with the 3.55 differential.
 

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I can get 23 mpg on the highway with my '96 F250 if driving in the 55 - 60 mph range.

At 70 mph I usually achieve around 21 mpg.

Towing a 27-foot travel trailer, my mileage averages 14 mpg.

I've got an automatic with a 3.55 differential, so the engine rolls over at a leisurely 1500 rpm at 60 mph. My truck has a fiberglass bed cover.

I've got no chips or programmers any other such improvements that would enhance fuel mileage or power, but I have enhanced the exhaust system by replacing a flattened exhaust down-pipe that was shoehorned onto the original 7.3 Powerstroke trucks.

These ole 7.3 beasts are able to achieve excellent mileage, especially with the 3.55 differential.

I get less than 20MPG in mine :(
 
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