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Old 07-12-2016, 07:53 AM   #15
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Four years, 25K miles, about 75% highway, mountain and flat, towing, about 106 Lbs/hp, cruise ~63-65, avg 7.4 mpg.

John & Diane, fulltiming since '12 02 DS, FL, Cat, '04 Element NHSO RVM103

John & Diane, Fulltimers. RVM103 NHSO
On the road since June '12 with Lincoln, the guard cat.
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element
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Old 07-12-2016, 07:56 AM   #16
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Have an older MH with a 275 Cummins and MD3060 tranny. My low end is 9 and my top end is 12.5. I tow an RX300 and my GVWR for the MH is about 24000. I usually maintain 60-65. Just completed a 4000 mile trip.

The Cummins computer stores info for the last 100000 and it indicates an average of 10.1 for those miles.

I have a very light foot and drive about 300 miles a day or less to keep from stressing components.

98 Endeavor DP, ISB275
RX300, Falcon II hitch, BB Vantage Select
VMSpc, 2002 Grey Ford Powerstroke
TST 507 w/ 10 Sensors
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Old 07-12-2016, 09:30 AM   #17
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We have a 2014 Thor Palazzo with a 300 hp Cummings and we pull a Jeep wrangler unlimited. We get 11 towing and 12 not towing. I run 65 mph most of the time.
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Old 07-12-2016, 11:56 AM   #18
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31,000 lbs + 4500 lb toad. C8.3L 300 hp Cummins.

14 year spreadsheet average 7.3 mpg over 74,000 miles.

Fuel purchased/miles driven. No electronic computer.

Most travel up and down the hills in California and Oregon.
1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
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Old 07-12-2016, 07:12 PM   #19
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On my last trip Edmonton to Saskatoon I got 10.45 MPG towing Jeep Liberty.
Wayne Cadieu--2007 CC Inspire 360--Caterpillar C-9.
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Old 07-12-2016, 07:21 PM   #20
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400 ISL - best was 8.3 not towing and in the mountains most of the day. Add the Jeep and 70 mph and it drops to 6-7 pretty quick.
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Old 07-13-2016, 05:54 AM   #21
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Slow to 60, MPG will improve greatly. Also, if possible, factor in idle time, generator use and Aqua Hot use. Gen and AH use was easy until AH stopped putting hour meters on their units.
2014 American Eagle 45T
DD 500
Pulling a Honda CRV
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Old 07-13-2016, 02:25 PM   #22
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Just completed an around the USA trip, Oregon, Texas up to Maine, down to Florida and back to Oregon. Average mpg per tank varied from upper 6's to mid 8 mpg all depending on wind and terrain. Life time average not including generator is 7.8 and probably 8.3 calculating generator at half a gallon an hour.
Bob, Sandi & Marmaduke the Big Pug
SW OREGON 2004 Journey 39K, 330 Cat
If towing: a 2006 Mini Cooper or 1995 Wrangler
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Old 07-14-2016, 10:49 AM   #23
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2015 Itasca Sunstar 36y towing a 6x12 trailer with my motorcycle 8.6 mpg cruise set about 65mph
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Old 07-14-2016, 12:10 PM   #24
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I shall not tell a lie...
ISC 350 Cummins with Banks kit running 400+ HP. The only thing I can't climb is a Peeled Tree.

We are parked, hence the road speed is zero. The average speed of course includes reduced speed areas such as towns, cities etc. Generally travel on cruise at about 62 MPH depending on road conditions.
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Dennis & Carol
2003, 4006, 41' DutchStar, Spartan, ISC 8.3L W/BanksPower - 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake. And the 04 Bird, Sunshine Car.
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Old 07-14-2016, 02:23 PM   #25
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Ours runs about 8 MPG. That's the Cummins ISC350 engine.
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 07-14-2016, 02:34 PM   #26
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Last APR AZ to TX, downhill with a tail wind, 7.2 MPG. Normally about 6.5, towing the F150 CC 4x4 @ 6K Lbs.
Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Trojan T-105's
2014 F150 4x4 Crew Cab Platinum 157" WB
Roadmaster Blackhawk 2, RVI2 Brake System
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Old 07-14-2016, 05:34 PM   #27
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My last trip to Alaska I got 8.3 to 8.9 towing Suzuki Sidekick
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Old 07-15-2016, 03:45 AM   #28
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I know you are asking a question about gas mileage and when considering to get ours I was concerned was hoping for about 10 but get around 7.5.

I think the motorhome community should start a new thought process as have I, not to consider gas mileage but cost per trip. Now I decide where I want to go determine if I can afford it then go or stay home.

All motorhomes get poor mileage but remember your moving a big square block,

Jerry & CP (copilot) Joyce RVM 109
2000 Coachmen Mirada 340 MBS
Chasing the Rainbow
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