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Old 10-31-2007, 04:33 PM   #1 (permalink)
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FORD 5.4 vs 6.8 vs 7.3

Which engine gets what kind of fuel milage?

Right now I have a 2000 SD 2x4 5.4L and I get 12.5 mpg empty on the highway.

What could one expect from the V10 and the diesel of the same era?


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Old 10-31-2007, 05:28 PM   #2 (permalink)
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My crewcab 4x4 7.3 gets 15-17 on the highway, it got slightly better after I got a programer for it.

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Old 10-31-2007, 05:45 PM   #3 (permalink)
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Quote:
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My crewcab 4x4 7.3 gets 15-17 on the highway, it got slightly better after I got a programer for it.

Brewchief
That's the same as what my dad's '99 crew cab PSD truck gets. I don't think that's too bad considering the size of the vehicle.

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Old 10-31-2007, 06:17 PM   #4 (permalink)
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My '01 CC 4x4 7.3 gets 19 in the city... No chips or programmers yet.
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Old 10-31-2007, 06:20 PM   #5 (permalink)
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'02 SC 4x4 V-10 bone stinkin' stock. I don't drive like a bat outta hell, but my foot is pretty heavy.

Empty: 10 mpg city, 12 highway,
Towing: 10 mpg...lowest while towing was 8 mpg. (Bed full of heavy ass oak furniture, and towing a Range Rover)
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Old 10-31-2007, 07:18 PM   #6 (permalink)
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I had a 5.4 expy that did 12-15 unloaded and freakin 6-7 towing my ranger (7k or so with trailer).

my 7.3 f350 gets 15-18 unloaded and 12 with just the ranger. And only drops to 10ish with my cabover on while pulling the ranger (grossing 20k) Even when it was STOCK it laughed at hills the expy choked on
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Old 11-01-2007, 04:48 AM   #7 (permalink)
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Which engine gets what kind of fuel milage?

Right now I have a 2000 SD 2x4 5.4L and I get 12.5 mpg empty on the highway.

What could one expect from the V10 and the diesel of the same era?


Thanks
My 2000 F250 4x4 Supercab w/ the V10, 35's, and 4.88 gears gets around 12 on the highway, 10-11 in everyday driving, and 7-8 hauling 12k pounds.
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Old 11-01-2007, 05:38 AM   #8 (permalink)
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1999 7.3 2x4 Manual trans, Std. Cab, long bed, Juice/attitude, straight pipe, k&n drop in, tonneau cover, 164k on the ticker

Commuting (mostly highway, 70-75 mph) I get 19.5-20.5 consistantly, "empty".
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Old 11-01-2007, 06:24 PM   #9 (permalink)
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01 Screw 5.4L, 4x4, CAI, Cat Back Exhaust, 3:55's....around town...no better than 14MPG (thats driving like a grandma) normal driving gets my 13MPG. Loaded with the TJ on a 16' flatbed is around 8-9MPG...I take my time.

Looking for a 01-05 Cummins or 01-05 PSD or 03-05 Duramax (which ever I find thats a better deal and exactly what I want....leaning towards Cummins)
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Old 11-01-2007, 07:45 PM   #10 (permalink)
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01 Screw 5.4L, 4x4, CAI, Cat Back Exhaust, 3:55's....around town...no better than 14MPG (thats driving like a grandma) normal driving gets my 13MPG. Loaded with the TJ on a 16' flatbed is around 8-9MPG...I take my time.

Looking for a 01-05 Cummins or 01-05 PSD or 03-05 Duramax (which ever I find thats a better deal and exactly what I want....leaning towards Cummins)
3.55s and a small gas engine are the recipe for wanting a diesel tow rig
Travis..
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Old 11-01-2007, 08:19 PM   #11 (permalink)
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My '00 CC 7.3 gets about 14 realistically on the freeway running anywhere from 70-85MPH with it on the +120HP DP Tuner program... that's hear in CO with a couple of mild hills here and there.

Towing, I can get anywhere from 6 dragging my much taller than truck YJ, on top of a heavy deckover trailer, through Kansas, into a wicked headwind... to around 9-10 pulling the YJ around the Rocky Mtn's.

Don't forget on the 7.3's that around '01, they switched to PMR's so you can't throw as much HP at them stock... if that's something you were thinking of doing. (that's why I went with a clean '00 over a newer F250)
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Old 11-02-2007, 07:38 AM   #12 (permalink)
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My '00 CC 7.3 gets about 14 realistically on the freeway running anywhere from 70-85MPH with it on the +120HP DP Tuner program... that's hear in CO with a couple of mild hills here and there.

Towing, I can get anywhere from 6 dragging my much taller than truck YJ, on top of a heavy deckover trailer, through Kansas, into a wicked headwind... to around 9-10 pulling the YJ around the Rocky Mtn's.
You bring up a good point. I should have mentioned that my dad's truck gets ~17 mpg on the highway as long as he does not exceed 72 mph. If you actually drive the speed limit around here or go with the flow of traffic which is even faster, the mileage goes down to about 14-15 mpg.

Your mileage towing seems low for what you're towing, but maybe it's heavier and less aerodynamic than I'm thinking? My parents tow a decent sized 5th wheel with their truck and mileage is always right at about 10 mpg with a few trips in the 12 mpg range when towing speed was down around 55 mph rather than 65-70 mph, which I would think would be less aerodynamic than your jeep?
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Old 11-02-2007, 07:46 AM   #13 (permalink)
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3.55s and a small gas engine are the recipe for wanting a diesel tow rig
Travis..
My buddy just bought an 07 Dmax crew cab 4x4 and it made me hate towing with a half ton.

I want to step up to some taller BFG all terrains and 4:10 gears but why throw money at something that already sucks nutz?
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Old 11-02-2007, 08:10 AM   #14 (permalink)
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Quote:
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I want to step up to some taller BFG all terrains and 4:10 gears but why throw money at something that already sucks nutz?
You're going to make it worse if you throw taller tires on it...

Put the 4.10s in and leave the tire size small and the truck would at least do better until you could afford an upgrade.

I have to say that once you've towed with a modern diesel though, it makes you hate towing with a gasser.
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Old 11-02-2007, 09:20 AM   #15 (permalink)
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I have to say that once you've towed with a modern diesel though, it makes you hate towing with a gasser.
yup... and it's not about mileage or cost savings or orororororooror it's about POWER
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Old 11-02-2007, 09:21 AM   #16 (permalink)
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You're going to make it worse if you throw taller tires on it...

Put the 4.10s in and leave the tire size small and the truck would at least do better until you could afford an upgrade.

I have to say that once you've towed with a modern diesel though, it makes you hate towing with a gasser.
I agree. I would hate to throw anymore money at it then I have to. I want to sell this truck in the spring and throw down the money made off of it on a newer used diesel truck.

After reading and searching a lot...the only reasonably choice is 98-05 Cummins and 03-05 Duramax. I'm a Ford person and prefer Ford over others but I can't justify buying a new PSD and have the stealership screw on blown turbo's or warped heads or high pressure oil leaks that are common with 03-04 6.0's.
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Old 11-02-2007, 10:16 AM   #17 (permalink)
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I agree. I would hate to throw anymore money at it then I have to. I want to sell this truck in the spring and throw down the money made off of it on a newer used diesel truck.

After reading and searching a lot...the only reasonably choice is 98-05 Cummins and 03-05 Duramax. I'm a Ford person and prefer Ford over others but I can't justify buying a new PSD and have the stealership screw on blown turbo's or warped heads or high pressure oil leaks that are common with 03-04 6.0's.
The 7.3L PSD trucks are pretty solid if you really want a Ford truck. My dad's truck has been pretty decent lately after he quit taking his truck to a "family friend" for service and repair work and started doing it himself again.

Additionally, is there any reason you're ruling out a '94-'98 12v CTD truck?
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Old 11-02-2007, 11:14 AM   #18 (permalink)
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Originally Posted by OkLaHoMaYJ View Post
My buddy just bought an 07 Dmax crew cab 4x4 and it made me hate towing with a half ton.

I want to step up to some taller BFG all terrains and 4:10 gears but why throw money at something that already sucks nutz?
If all you tow is a Jeep on a 16' trailer, it seems a waste to buy a new truck. Slap in some 4.10s and leave your tire size alone. I bet your empty mileage stays the same (unless you drive 80mph everywhere) and your towing mileage goes up a bit.
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Old 11-02-2007, 04:32 PM   #19 (permalink)
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I haven't ruled out a 12v yet. I just want to find one with around 100k miles on it.

I tow just a TJ on 16ft flatbed and a 21' Super Air Nautique wake board boat thats pretty heavy. When the TJ is trail ready, I'll be traveling at least once a month for the prime wheelin' season in my area. I really think a good used diesel would suit me better then what I have now.

I could easily do the gears myself with the help of a friend that has all the necessary tools for the swap. I havent ruled it out yet but I'm seriously leaning that direction.
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Old 11-02-2007, 06:06 PM   #20 (permalink)
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I haven't ruled out a 12v yet. I just want to find one with around 100k miles on it.

I tow just a TJ on 16ft flatbed and a 21' Super Air Nautique wake board boat thats pretty heavy. When the TJ is trail ready, I'll be traveling at least once a month for the prime wheelin' season in my area. I really think a good used diesel would suit me better then what I have now.

I could easily do the gears myself with the help of a friend that has all the necessary tools for the swap. I havent ruled it out yet but I'm seriously leaning that direction.
If you like the truck otherwise, it would be a whole shitpot cheaper to do the gears than start over on a different truck.
Travis..
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Old 11-02-2007, 07:25 PM   #21 (permalink)
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Your mileage towing seems low for what you're towing, but maybe it's heavier and less aerodynamic than I'm thinking?
The low side (going through KS) was the worst possible headwind I could imagine... it was probably 40-50mph winds head on; had to keep the steering wheel at the 1-2 o'clock position to go straight. Most of the other time, I am up in the mountains pulling Eisenhower tunnel and the likes... just steep mountains is all. I also am not afraid of the gas pedal... on steep climbs, I am usually limited by EGT's and have to lay off the gas.


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My parents tow a decent sized 5th wheel with their truck and mileage is always right at about 10 mpg with a few trips in the 12 mpg range when towing speed was down around 55 mph rather than 65-70 mph, which I would think would be less aerodynamic than your jeep?
My trailer puts the Jeep way up high since it's a deckover. Couple that with the aerodynamic styling of the Jeep sticking up over the trucks roofline and I think that's probably why.

As far as the original poster as concerned... I bought a truck I like with the intention of building it to do what I needed. Just like our offroad rigs, you have to build it to perform... stock sucks.

Beware of the 4r100 tranny's. I replaced mine with a BTS.
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