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06-19-2012, 08:32 PM
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#1
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Junior Member
Join Date: Jun 2012
Location: mira loma ca 91752
Posts: 14
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MPG for 5.9 diesel
I have a 34ft winni adventurer with a 5.9 litre diesel & a 5 speed Allison tranny dose anyone know approx. MPG I should get. thanks for any help. Ray
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06-19-2012, 08:42 PM
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#2
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Senior Member
Join Date: May 2009
Location: Northeast, MD
Posts: 173
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Not sure off hand as I do not own one but if you google it or go to www.ask.com and search it it should be able to help you
__________________
The Williams Family-Northeast, MD 21901
1999 Foretravel U320C-Gray, Black Mix W/ White
41 FT 9"-M11 450 H.P Cummins-1550 Ft Lbs of TQ 
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06-19-2012, 09:09 PM
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#3
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Junior Member
Join Date: Dec 2007
Posts: 12
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I have a 38 ft 2005 w/ B 5.9 engine - weighs about 30,000 lb. Usually travel in 55 - 65 mph range. I usually get about 10 mpg. without a tow. Less around town.
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06-19-2012, 09:17 PM
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#4
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Senior Member
Fleetwood Owners Club
Join Date: Jun 2011
Posts: 690
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We have a 6.7 liter Cummins ISB and we got average 8.6 mpg this last trip. Lots of wind so sometimes it helped but mostly hindered our mpg. Before the Banks kit we were getting 7.6 mpg. I run it in power level 5 as 6 seems to get to max (1350 degrees) exhaust temp much faster. I try to turn off the cruise control before it hits high temps but not always successful but most times it is only for less than a minute. Wish I had a bigger motor so I did not need to watch it so closely.
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06-20-2012, 06:06 AM
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#5
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2007
Location: Home on the hill in Georgia
Posts: 2,742
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My 5.9L in a 36 foot motorhome averages about 9.5 combined Florida and mountains.
__________________
Jerry Potter, Taz
1999 Coachman Catalina Sport
[SIGPIC][/SIGPIC]
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06-20-2012, 06:11 AM
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#6
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Member
Join Date: May 2011
Location: Deerfield, Ohio
Posts: 72
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MY is a 91Gulf Stream 31 foot I get 10mpg towing my Jeep or not. It's an 160 Hp
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06-20-2012, 10:05 PM
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#7
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Senior Member
Join Date: Aug 2011
Posts: 162
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Ditto on the around 10mpg.
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06-21-2012, 08:20 AM
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#8
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Senior Member
Join Date: Oct 2011
Location: Elbert, Colorado
Posts: 259
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Interesting responses. My 1999 38' Diplomat with the 275 HP ISB, towing a Jeep Wrangler (3,200#), gets a range of 7.5 to 9.5 mpg; 7.5 in mountains and/or a head wind, both of which we have a lot of here in the mountain west. Last winter I got very near 10 mpg in the deserts of Arizona and California. All of these driving with the cruise set at 60 mph, at 1600 - 1650 rpm. No doubt I could do better at a bit slower speed, but I have to be above 57 mph to stay in 6th gear.
__________________
2007 Itasca Ellipse 40TD "High Plains Drifter"
'02 Wrangler Tender
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06-21-2012, 09:16 AM
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#9
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Senior Member
Join Date: Nov 2009
Location: Bainbridge Island, Wa
Posts: 557
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Cummins ISB 5.9 gets 12 towing a toad in Nebraska, 10 in the mountains. GCVW is about 29000.
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06-21-2012, 09:20 AM
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#10
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Senior Member
Join Date: Nov 2011
Location: Full time RV'er
Posts: 5,146
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In a 37', 23,000lb rig, with a 5.9L, I have averaged, over 65,000 miles, 9.90MPG. Naturally, it ranges from 8.5MPG to 13.0MPG depending on conditions and route. Travel between 55-65MPH.
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06-21-2012, 12:17 PM
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#11
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Senior Member
Join Date: Feb 2012
Location: Baton Rouge, LA
Posts: 1,202
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We have a Cummins 5.9l 300 hp in a 39 foot rig pulling a 3500# Saturn Vue. Drviing 62-64 mph, we have averaged 9.5 mpg for over 38000 miles. Worst mpg was 8.2 in the Rocky Mountains, and the best was 10.9 in Kansas going east.
__________________
Jim and Lynda, (Sophie, Jake, attack trained killer Shi-Tzus :-))
2003 Fleetwood Expedition 38N 2005 Saturn Vue
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: 
Linear Mode
