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Old 01-24-2019, 04:49 PM   #85
Join Date: Jun 2014
Location: Allentown, Pa
Posts: 86
08 Coachmen Elite

08 Coachmen 40" 360 horse Cummins 8.3 ISC with Bully Dog Tuner(@415 hp)
7.2 pulling trailer 65-70 9.2 mpg running 58 mph no trailer.
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Old 01-24-2019, 04:50 PM   #86
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Join Date: Sep 2013
Location: Leland, NC
Posts: 166

My 2004 Country Coach Intrigue, 42 ft. with tag axle, weighing in at 43,000 lbs including the toad, got 5 mpg. Cruise set at 75 mph on open interstate, unless in the hills. Most other roads were posted speed limit or below, especially in mountain areas.
2018 GMC Sierra 3500 Denali Dually
2021 Coachman Freedom Express 321FEDSLE Liberty Edition
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Old 01-24-2019, 05:15 PM   #87
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Posts: 51

40 Ft. 2003 Travel Supreme
400 Cummins ISL
2018 Chev. Phoenix automatic
63 mph on cruise
8+ miles per gallon
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Old 01-24-2019, 05:16 PM   #88
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Big 2 factors are you going full time or like me only + - 15 k a year If full time yes diesel but cost of operation is hi and the more miles you pound it gets better, Gas jobs like mine a 2002 adventurer 32V with a workhorse chassis and a Allison automatic,8.1 gm gas job does me fine + - 7 mpg cost factors a lot less as a diesel as very good engines but very costly to fix if you are driving low miles every year. I am a retired trucker with over 4 million miles under my belt ,So I guess my question is if full time 40' plus nice but part tine personally 32-36' is all you need with out big @ss aches as to maintain your new RV.
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Old 01-24-2019, 05:17 PM   #89
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Location: Deep in SWFL
Posts: 120
2001 Newmar Dutch Star 3858 CAT 3126B 300HP FL chassis. Around 8 mpg MAX w/Cruise set for 62. No tow. Mostly flat Interstate.
2001 Newmar Dutch Star 3858 CAT 3126B 300HP FL
Full timing in the Tommy Truck
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Old 01-24-2019, 05:18 PM   #90
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2013 Thor Palazzo, Cummins ISB 300/Allison with 46000 miles on it, pulling a full sized HD Deisel Silverado, flat hey 10-11.5 MPH. Amazing!, drops down to 9.5 with hillis.
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Old 01-24-2019, 05:27 PM   #91
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Join Date: Oct 2018
Location: Mulino, OR
Posts: 432
Diesel pusher milage

2001 Monaco Cummins 350 hp Allison trans. I get around 8-8.5 mpg. It doesnít care if Iím towing anything or not. I use the cruise control as much as possible. When itís on cruise, it has more power climbing hills. I just let it go!
Ready to retire and get out of Oregon
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Old 01-24-2019, 05:32 PM   #92
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Location: Palmer Ak
Posts: 1,136
2009 Monaco Diplomat 38', 400 horse Cummins pulling a 1999 Dodge Durango and long trips, 7.3-8.1 depending on how many mountains.
2009 38' Diplomat
CSM- retired, wife as co-pilot
Reka & Ali providing security (our 2 labs)
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Old 01-24-2019, 05:34 PM   #93
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I have 2007 National RV Tropical LX T350 which is 36' long with Cat engine. Mileage computer display shows 8.8 to 9.0 depending on terrain but mostly at 8.8. Coach is comfortable and well built. National no longer in business but common parts and components are available.
2007 TropiCal LX
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Old 01-24-2019, 05:34 PM   #94
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2001 Monaco Executive, 500hp Cummings. We went coast to coast last year, mountains, flat lands, snow and name it. We were towing 5x8 enclosed trailer. We averaged 8.6 mpg over the two month trip and covered 8600 miles.
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Old 01-24-2019, 05:35 PM   #95
Join Date: Feb 2016
Posts: 32
2015 Fleetwood Discovery 37ft.
Cummins 380HP
If I drive ~60, i can get 10.
But that drops off rapidly when the speed increases.
Joe & Diane Hoffman
Dog: Dessa the Landseer
2001 Prevost Marathon H3-45 VIP
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Old 01-24-2019, 05:36 PM   #96
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Location: Tampa FL
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DP fuel mileage

Originally Posted by Dan104 View Post
Looking at 2000 to 2006 Diesel Pushers 36 to 40' long. Being I like to know what I am getting into in advance. Please let me know what MPG you are getting. Please include year, model, length, Cummins or CAT, HP, interstate cruising speed driven. Thanks
Have a 2007 Fleetwood Excursion 40X, 360 hp Cummins Lincoln MKX toad, run 65 mph as law allows. Average around 7-7.5 mpg depending on terrain. No DEF and regen every 2,000 Miles.
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Old 01-24-2019, 05:36 PM   #97
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Diesel Mileage

2005 Travel Supreme 40' with 400HP Cummins

Flat towing with Saturn Vue toad (Carolinas, Florida) we get 10mpg.

Driving through the mountains (hills?) in New York and Pennsylvania it's more like 6mpg.

Overall I always use 8mpg for any trip calculations and it's usually bang on!

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Old 01-24-2019, 05:38 PM   #98
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2006 42' Gulfstream 450 Cummins, overall average 6.3.
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