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Old 09-12-2015, 11:41 AM   #11
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Yes and elevation change from one place to the other/ out side temperature . Heat of day verses cool mornings, traffic, 5 mile an hour head wind makes big difference, we pull as a group, when I lead, it cost me 3 tents on my mpg just saying /

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Old 09-12-2015, 11:58 AM   #12
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Originally Posted by aceinspp View Post
The extra height and width will make a difference. Slightly more drag so less fuel mileage. Later RJD

Slow to 60 and enjoy the ride. MPG should increase.

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Old 09-12-2015, 12:05 PM   #13
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I always used to think it was the weight of the trailer that made the difference as well.. Until I went from a 2306 mini light to the heavier and larger Cherokee and got the same MPG, It shocked me that most of the weight is negated but the frontal area is what would determine the MPG and drag.

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Old 09-12-2015, 12:36 PM   #14
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Lots of good points here. Wind, even 5 mph head wind makes a difference. It makes 65 mph into 70 mph. The extra height may be giving more wind resistance. Hopefully you'll find your sweet spot speed where your mpgs and speed are satisfactory. Mine is 60-63 mph.
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Old 09-12-2015, 12:39 PM   #15
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It's not usually the weight that causes negative MPG's, unless it's drastic. It's got everything to do with the size of the "billboard" you are pulling.

My MPG will vary from a low of 10.8 to a high of 13. Head wind, tail wind, mountain's, etc.
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Old 09-12-2015, 06:55 PM   #16
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I tow a 39 ft with my 2015 Ram 3500 at about70-75 mph and got an average of 10.5 on a 2900 mi round trip so I would say with a shorter trailer and running 65 you got good fuel mileage.
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Old 09-12-2015, 07:23 PM   #17
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Seven years ago my wife and i bought a Sydney Outback 31 footer and averaged 11 mpg over many trips. We just bought a TT Forest River Wind jammer. We were told the V shaped front end and lighter weight should give us better MPG. After several trips with the new TT we found it get 11 MPG. This doesn't upset us that much, but I thought it would be better than that. As my Dad used to say "It's only money." By the way we pull with a GMC 2500 Duramax with towing package.
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Old 09-12-2015, 07:28 PM   #18
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We have a 829FKSS flagstaff and a 2014 F150 Ecoboost. We average between 9.5 and 11.5 depending on how I am pushing ( not over 65mph). That means that on a 200 mile frip I may spend an extra 5 bucks. Not a huge concern to me. Truck $50000, trailer $30000, fuel cost $2.49/gal ( ny state takes us to the cleaners), doing something we really enjoy, priceless.
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Old 09-13-2015, 05:32 AM   #19
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When I was young, I drove a Carmanghia. It is the streamlined version of the Volkswagon. I put a luggage rack on it so I could take my john boat to the lake. I couldn't pass semi-trucks without a running start because of the wind coming around the semi, and my mpg went from 40 to 30. I left the luggage rack on for a while, and just the rack dropped my mileage 2 mpg. I've often wondered if leaving the back bunk of my Roo open wouldn't give me better mileage, but I don't think I'll try it.
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Old 09-13-2015, 06:19 AM   #20
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Several years ago F/R Rockwood TT and ROOs were only 7 to 7 1/2 feet wide and Roos came with 13" Tires! Now they are 8' wide sitting up taller as well! This all adds up to Less Mileage.We were just Passed by a Transporter pulling several NEW SOB trailers on a Flatbed trailer,they were single axle 7' wide TT they were Not Retro just short TT, I think they were called Eveos? Youroo!!

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