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Old 02-04-2016, 04:17 PM   #43
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2013 Newmar Ventana 3434 (34' 10") w/ 360 HP ISB-XT 6.7 & Allison 3000MH here. It's still fairly new to me, having just bought it last September, but so far I'm seeing 10.x MPG at 65-70 MPH w/o toad. Pulling my Jeep YJ on a Big Tex 60CH trailer from San Diego to El Centro & back last month, mileage was 8.x MPG at 55-60 MPH.

Both mileage figures came from the LBCU. Hand-calculation is kinda difficult due to hydronic heating & generator use, as others have mentioned. Also, not sure of the rig's exact weight since I haven't had it on scales yet. But I estimate ~35-36k lbs. GCW while towing & ~30-31k lbs. GVW without towed Jeep+trailer assembly (based on factory UVW & other known weights).

2013 Ventana 3434
1994 Jeep Wrangler
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Old 02-05-2016, 08:54 PM   #44
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Thinking of getting rid of the challenger, or just comparing?

Ford RV V10 5 star Tow tune
Front/Read Roadmaster 1 3/4" anti-sway bars. Roadmaster steering stabilizer
2009 Acme Tow dolly w/ 2014 Avalon Hybrid Limited
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Old 02-06-2016, 08:07 PM   #45
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Location: Shooting Creek, NC... for now
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45k miles in 17 months - across country several times, mountains of all types and sizes, into/outa Canada's PrinceEdwardIsland, KeyWest, Seattle, SanDiego, NewYorkCity...

11.5 mpg
The Turners 2014 Thor Palazzo DP 33.3 35' Bunkhouse
BlueOx, '14 Ford Fiesta, DishHD, KingTailgater2, WifiRanger
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Old 02-07-2016, 09:19 AM   #46
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FWIW: Doing the math (miles driven/gallons burned) I am averaging a touch better than 11.2 mpg-- OEM trip computer thing mostly agrees. Only 8,000 miles on new '15 coach, though. Travel has been mostly flat-land in the Mid-west, only a few hundred miles in the Smoky Mtns. Drive around 63 mph as that seems to be the sweet spot on this new-to-me ISB 6.7 Cummins. Even though I am running about 3 mph faster, it beats my old, 71,000 mile, 5.9 12-valve Cummins by almost 2 mpg. I do now have six forward speeds vice five and may even be a few pounds lighter, however. One thing quite noticeable was the almost 1/2 mpg increase between the first couple of hundred gallons and the last few hundred I've burned. A 6-8,000 mile break-in period? Hopefully it is not broke-in yet and things will get even better. P.S. I do pull a toad 90% of the time. Dan
Excursion 33D & Vue Toad
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Old 02-07-2016, 03:49 PM   #47
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Hello all,
I have a 2004 Newmar Dutchstar 38 ft, Cummins ISL 370 Hp, 126,000 miles on odometer.
coach weight around 28,500-29,000 lbs with normal load, full fuel and 75 gal. water.
toad curb weight is 4100 lbs (2012 Jeep Liberty).
Generally drive 65-67 mph on interstate and around 5 mph lower than speed limit on other roads, usually on cruise control.
Over the last 5800 miles I have averaged 7.96 mpg, highest was 9.1 and lowest was 7.1.
Over last 6000 miles I

2004 DutchStar DSDP3812, Cummins ISL 370Hp, Spartan MM Chassis, 2012 Jeep Liberty toad, Blue Ox Aladdin Tow Bar, FMCA #F451747
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