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Old 09-09-2016, 06:54 PM   #141
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Originally Posted by MarkR View Post
2001 F150 SuperCrew
3.55 Differential
5.4L Engine
Hwy 5 / Flat Central Valley
60 - 65 mph
'60 Tradewind (most likely 4,500 lbs)

Drum Roll Please:

9.5 mpg . . . so sad
Ouch! I used to be able to coax my 2010 F 150, 5.4 with a six speed into the high 13's easily on flat roads... If I kept my foot out of it, that truck did fairly well.
Bruce
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Old 09-09-2016, 10:06 PM   #142
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Maybe 9 years of technology "squoze" a little better mpg into the truck . . . I had O.D. turned off but the engine was at 2,500 rpms, so it wasn't screemin' . . . and I was mostly going 60 . . . If I turned O.D. on then the rpms would drop way down and then . . . "bog" . . . (because I didn't want to go any faster than mid 60's) . . . someone said to get a K & N Air Filter, that it might help . . . I haven't tried anything yet . . . maybe 3.73 ratio would hit the "sweet spot" . . . (not that I'd go through with swapping out the differential).
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Old 09-10-2016, 05:01 AM   #143
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I had a '09 Dodge Ram 3500 6.7L Quad Cab SRW 4x4 prior to trading it in on my '12 Dodge Ram 6.7L Crew Cab SRW 4x4. While I never towed with the '09, the best mpg I ever got solo with it was 20 mpg. The best I've gotten solo with the '12 is only about 14 mpg. Same gears (3.73) only real difference (other than body style) was crew cab instead of quad cab. I kinda wish I'd quit while I was ahead.


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Old 09-11-2016, 05:44 AM   #144
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I would see at least a 10% reduction in mpg for each five mile per increment in speed with my 2010 GoldWing motorcycle. Running 55 mph would see in the high 30s and the posted 80 mph on I-10 in West Texas would see mid 20s.
You also have to deal with the wind in west Texas. So not only do you have the increase in speed, but the wind which cuts into your mileage.

One other note depending on the elevation you will see a difference in your MPG. The higher the elevation, the better the fuel economy.
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Old 09-12-2016, 10:21 PM   #145
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I have an 08 Tundra 2wd with the 5.7L motor and 6 speed. It has the SR-5 package which means it also has the tow package. Motor and tranny are great. My 66 Tradewind weighs about 5,000 lb ready for camping and I get 13.5 mpg towing gently and 20 mpg solo highway. I am very satisfied.

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Old 09-12-2016, 11:09 PM   #146
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I get about 11 mpg whether towing the 20' Silverstreak, 31' Airstream or the 16' trailerCamera. 2014 Tundra TSS 4x4 5.7l. I almost exclusively use tow/haul mode for the torque and gear governance. Get about 18mpg when towing just air. But I can tow the space shuttle if needed
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Old 09-13-2016, 12:20 AM   #147
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He he. That Toyota Tundra is parked not far from the Space Shuttle it towed. I think Toyota gave it to the museum here in California.

It's good advertising, but I wouldn't want to buy it as a used vehicle. 😀😀😀


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Old 09-13-2016, 09:19 AM   #148
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You may enjoy this discussion on modeling towing an Airstream trailer:

http://ecomodder.com/forum/showthrea...ics-32325.html

The thread starts with:
I spent a week and a half playing around with Dr.Frank Buckley's drag data from the late 1970s 'Sedan/Airstream' wind tunnel study at The University of Maryland.
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Old 09-13-2016, 09:26 AM   #149
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2007 Tundra

We got 13.9 mpg on our maiden voyage pulling our brand new 2016 19 ft flying cloud ...pretty happy about that
Probably because I was afraid to go over 55
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Old 09-13-2016, 09:51 AM   #150
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2012 tundra pulling 2011 23FB. Just got back from Colorado trip. Averaged 11-12 mpg, and tried pretty hard to keep it under 70 mph. It's ok mileage, but with the fuel capacity I have, I don't go too far past 200 miles on a tank.
Married 39 years, ran out of gas one time with the family. I'm a lot more careful now.
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Old 09-13-2016, 10:04 AM   #151
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Quote:
Originally Posted by sgschwend View Post
You may enjoy this discussion on modeling towing an Airstream trailer:

http://ecomodder.com/forum/showthrea...ics-32325.html

The thread starts with:
I spent a week and a half playing around with Dr.Frank Buckley's drag data from the late 1970s 'Sedan/Airstream' wind tunnel study at The University of Maryland.
Really interesting read!
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Old 09-13-2016, 04:32 PM   #152
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It's an excellent site. "Aerohead" has guru status, well-earned.

What I should have added in my posts there is that,

- the highest absolute mpg for given TT will be due to TV spec.

- But, highest mpg among an otherwise identical group will be to the operator with the greatest motivation. In commercial driving this difference is just over 30% when all else is the same.

IOW, a lousy driver can defeat the best attributes of a well-designed combined rig.

And, what's possible for a given rig is almost never explored.
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Old 09-13-2016, 04:53 PM   #153
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I got 14.5 to 15 MPG with my wife's Audi Q7 TDI towing our 25FB then I discovered that we needed Generators, chairs, tables, BBQ, patio mat, outside beer cooler.........now I get 12 to 12.5 or so with a 2016 Silverado 1/2 ton Crew 4X4 with the 5.3. Live and learn.
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Old 09-13-2016, 05:12 PM   #154
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.. all the number crunching will get you to the same conclusion- 12- 15 MPG is what you will likely get.
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