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Old 10-18-2011, 06:59 AM   #15
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1972 23' Safari
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1975 Argosy...9.9 mpg on flat ground (Florida) after a carb rebuild and a new remote air cleaner set-up.
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Old 11-02-2011, 07:20 PM   #16
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1982 31' Airstream 310
Longview , Washington
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I just put a 1995 Dodge Cummins in my 1982 31 Cassic!! I hope it get as good as my Isuzu. It got 14/15 MPG.
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Old 11-02-2011, 07:52 PM   #17
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Cactus Hug , Arizona
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I just put a 1995 Dodge Cummins in my 1982 31 Cassic!! I hope it get as good as my Isuzu. It got 14/15 MPG.
We get 15, up/down with our Isuzu, burns no oil at 248 thousand. What happened to your bullet-proof engine to cause a replacement? AND, I guess, the other question would be, was the change-out a big deal and did it bolt-up to the GMC 470 trans? Do you still have the Isuzu engine?
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Old 11-03-2011, 11:33 AM   #18
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22' Safari Lite, Ram 3500 Diesel 15.5 mpg.
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Old 11-03-2011, 01:59 PM   #19
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Longview , Washington
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I got the whole Truck. I cut the motor mount off the frame and used them to mount the engine. It was a hard job, but we got it done. It run about 8 to 9 weeks to do the job. It's not a old man job!!!!!
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Old 11-04-2011, 08:58 AM   #20
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1986 34.5' Airstream 345
choctaw , Oklahoma
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It's not a old man job!!!!!
If I had found a wrecked Dodge Commins 5.9L or Isuzu N series 5.2L I'd be pumping diesel in the Silver Bullet now. But none were to be found last year when my 545 Allison transmission went out, so I have a 4L80e w/overdrive. Get the same with the toad as the Allison (6.3), but it looks like I got 7.2 w/o the toad. With the Allison I got 6-6.5 towing or not, 55mph or 70mph. The 0.75 final gear makes for a lot less engine noise.
Now maybe it's time for that hydraulic roller cam.
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Old 11-04-2011, 09:18 AM   #21
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For what it's worth, we just rented a Ford 2012 F-250 Super Duty with the 6.7 Powerstroke. Six speed auto tranny. Crew Cab, long bed. Four wheel drive. Pulled a 27FB from Downtown Dallas to northern Fort Collins CO by way of Taos NM and then out through Tres Piedras and over La Veta pass ( 9400 ft.) into Colorado.

The truck was brand new, we were the first renters. had 237 miles on it. The manager of the rental place is a dog lover and a new blog fan so she set us up pretty well with one of their new trucks. So it was not 'broken in' in any way. We put just over 3,000 miles on it in two weeks. It was equipped with a MPG function, of course.

When we picked the truck up in Houston and drove it empty up to Dallas, it was getting around 18.2 mpg on the highway. No load whatsoever.

We hitched up the trailer, which probably ran around 6,000 lbs, in Dallas and continued onward. I never got the chance to install the Reese WDH/Antisway hitch I had with me. It sat in the rear floorboard of the Ford the whole trip.

Worst mileage we saw was that long, bumpy uphill stretch of I-40 New Mexico toward Albuquerque before turning off toward Taos. The average dropped to 9.4 mpg at it's lowest while towing. The truck has unbelievable power. I had no hesitation drag racing various other trucks at red lights in Texas and while unhitched in NM ( 'beaten like a rented mule'). And beating them. I passed a septic truck uphill on a switchback on that road going into Taos. He pulled onto the shoulder and waved me on. I showered down on the accelerator and broke the rear wheels loose. That tells me it wasn't loaded too heavily on the rear.

We left the trailer in CO and drove the near empty truck back to Houston, going via the not too travelled route east out of Denver, then taking two lane roads down throu Eads and Ft. Carson, cutting across the worst part of Oklahoma and finally rejoining the modern world just north of Dumas TX. The average for the entire trip, start to finish, was 16.8.

My gut feeling while towing the trailer was that we were averaging around 11 mph just for the towing part.

We had rented an F-350 last spring from the same people in Houston ( PV Rentals, great people by the way) and preferred this 250. Only complaint was that it was just too long for easy driving in anything but a straight line. But boy does it do well at that.

I tended to keep it at around 65 mph for most of the trip, easing up to 70 from time to time to facilitate passing something slower. I had to really, really look to find any indication of sway, even with a straight, single, rental supplied receiver bar with nothing else at all to control sway. The rear bumper of the truck sat down about two inches when I put the tongue weight on it, but I couldn't feel much difference driving. It will burn the tires at any speed. I had to use 4X4 to get up a long uphill gravel driveway in Colorado Springs. I was surprised to find manual hubs again after year without them. But once we figured that out, the 4x4 walked up that hill in a stroll. I think this thing would have pulled the trailer up a tree if I could get the wheels to stick.

Anyhow, that was our recent experience ( last two weeks of October) if it's of any interest to anyone. I don't know the gear ratio on it. It was pretty much a barebones interior, with a factory tow setup.

Doesn't make me change my mind on what we want to buy next spring for our own tow vehicle, if I can find it. I am pretty sure we want a 99-'04 F250 with the 7.3 and for sure we want four wheel drive. And shorter. I think the two door extended cab and six foot bed would be a lot easier to deal with driving around little towns with 90 deg. corners on two lane roads.

Unless someone talks me out of it in the meantime.
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Old 11-04-2011, 11:27 AM   #22
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Anchorage , Alaska
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2010 Interstate 3500. On a 6400 mile trip from AK this summer we got 18 MPG. Best tank 20.67 MPG; worst tank 16.50 MPG. Ending ODO 11,845 so this vehicle is still breaking in. Love the Interstate.
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Old 11-04-2011, 01:35 PM   #23
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Quote:
Originally Posted by Gringo
For what it's worth, we just rented a Ford 2012 F-250 Super Duty with the 6.7 Powerstroke. Six speed auto tranny. Crew Cab, long bed. Four wheel drive. Pulled a 27FB from Downtown Dallas to northern Fort Collins CO by way of Taos NM and then out through Tres Piedras and over La Veta pass ( 9400 ft.) into Colorado.

The truck was brand new, we were the first renters. had 237 miles on it. The manager of the rental place is a dog lover and a new blog fan so she set us up pretty well with one of their new trucks. So it was not 'broken in' in any way. We put just over 3,000 miles on it in two weeks. It was equipped with a MPG function, of course.

When we picked the truck up in Houston and drove it empty up to Dallas, it was getting around 18.2 mpg on the highway. No load whatsoever.

We hitched up the trailer, which probably ran around 6,000 lbs, in Dallas and continued onward. I never got the chance to install the Reese WDH/Antisway hitch I had with me. It sat in the rear floorboard of the Ford the whole trip.

Worst mileage we saw was that long, bumpy uphill stretch of I-40 New Mexico toward Albuquerque before turning off toward Taos. The average dropped to 9.4 mpg at it's lowest while towing. The truck has unbelievable power. I had no hesitation drag racing various other trucks at red lights in Texas and while unhitched in NM ( 'beaten like a rented mule'). And beating them. I passed a septic truck uphill on a switchback on that road going into Taos. He pulled onto the shoulder and waved me on. I showered down on the accelerator and broke the rear wheels loose. That tells me it wasn't loaded too heavily on the rear.

We left the trailer in CO and drove the near empty truck back to Houston, going via the not too travelled route east out of Denver, then taking two lane roads down throu Eads and Ft. Carson, cutting across the worst part of Oklahoma and finally rejoining the modern world just north of Dumas TX. The average for the entire trip, start to finish, was 16.8.

My gut feeling while towing the trailer was that we were averaging around 11 mph just for the towing part.

We had rented an F-350 last spring from the same people in Houston ( PV Rentals, great people by the way) and preferred this 250. Only complaint was that it was just too long for easy driving in anything but a straight line. But boy does it do well at that.

I tended to keep it at around 65 mph for most of the trip, easing up to 70 from time to time to facilitate passing something slower. I had to really, really look to find any indication of sway, even with a straight, single, rental supplied receiver bar with nothing else at all to control sway. The rear bumper of the truck sat down about two inches when I put the tongue weight on it, but I couldn't feel much difference driving. It will burn the tires at any speed. I had to use 4X4 to get up a long uphill gravel driveway in Colorado Springs. I was surprised to find manual hubs again after year without them. But once we figured that out, the 4x4 walked up that hill in a stroll. I think this thing would have pulled the trailer up a tree if I could get the wheels to stick.

Anyhow, that was our recent experience ( last two weeks of October) if it's of any interest to anyone. I don't know the gear ratio on it. It was pretty much a barebones interior, with a factory tow setup.

Doesn't make me change my mind on what we want to buy next spring for our own tow vehicle, if I can find it. I am pretty sure we want a 99-'04 F250 with the 7.3 and for sure we want four wheel drive. And shorter. I think the two door extended cab and six foot bed would be a lot easier to deal with driving around little towns with 90 deg. corners on two lane roads.

Unless someone talks me out of it in the meantime.
I'm so jealous, that is exactly the truck I want (maybe in my next life it will happen)! I should look into renting one for my next ATV trip.

I have an F150 4WD with the 5.8 gas engine. I get about the same mileage, but certainly not the the same feel in the gas pedal! It is embarrassing when I have my foot to the floor and the semi trucks are passing me up.
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Old 11-05-2011, 01:59 PM   #24
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I never even thought about a Power Stroke as a replacement when my trany blow up.
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Old 11-11-2011, 10:16 AM   #25
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I'm so jealous, that is exactly the truck I want (maybe in my next life it will happen)! I should look into renting one for my next ATV trip.

I have an F150 4WD with the 5.8 gas engine. I get about the same mileage, but certainly not the the same feel in the gas pedal! It is embarrassing when I have my foot to the floor and the semi trucks are passing me up.
We were looking at 5 wheels last year before deciding on the MH. I test drove the 2011 F250 crew cab 4X4 short bed. King Ranch package. That was one nice ride! Very quiet and powerfull. I was very impressed. Price tag was impressive too.
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Old 11-11-2011, 10:26 PM   #26
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1982 28' Airstream 280
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We were looking at 5 wheels last year before deciding on the MH. I test drove the 2011 F250 crew cab 4X4 short bed. King Ranch package. That was one nice ride! Very quiet and powerfull. I was very impressed. Price tag was impressive too.
Yup, 60k+
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Old 11-12-2011, 10:11 AM   #27
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Yup, 60k+
I think MSRP was about $63K. At the time they were dealing at about $47K. By the time you pay taxes and all the other fees here in Colorado it was back up to about $55K. Add another $40K for a 5th wheel and then all the annual fees for plates, insurance, storage, ect....

That's when we started looking at used diesel pushers. Which lead to the Airstream search....
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Old 01-25-2012, 06:09 PM   #28
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1988 345 7.4 liter
(454) carburetor towing a Harley-Davidson Softail. I get 10mpg if I can keep my speeds at 60 or lower. If I try to run 70-75 like everyone else on the interstate it drops to 7mpg.
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