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07-14-2018, 07:18 PM
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#1
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Junior Member
Join Date: Jun 2017
Location: Bennington, NE
Posts: 22
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Ventana 4037, 6.7L or 8.9L???
I am looking at a 2016 or 2017 Ventana 4037 and trying to decide which way to go engine-wise. Does the 6.7 have the torque to get you up the mountains at decent speed? I had a 6.7 in my Tiffin and an 8.9 in my Fleetwood. I liked the 8.9 better, but the mileage was a couple mpg less.
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Bob and Crystal
2018 Fleetwood Discovery LXE 40G
2017 Jeep Grand Cherokee Limited
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07-14-2018, 07:25 PM
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#2
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Moderator in Memoriam
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,663
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Glad to have you here in the forum with us. You're gonna like it here. 
It seems that most diesels get about the same MPG 7-7.5 Sure there may be others getting better or worse, but it's usually because of driving habits and speed driven. If you're planning trip where you be spending time in mountainous areas you'll appreciate the 8.9.
Happy Trails!!!
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Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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07-14-2018, 07:37 PM
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#3
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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I'd go with the ISL.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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07-14-2018, 07:51 PM
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#4
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Senior Member
Join Date: Mar 2017
Location: OTR Western US
Posts: 304
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Who doesn't like to maximize mileage, but charging up a 6-7% grade at 60 sure is nice too.
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07-14-2018, 08:44 PM
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#5
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Senior Member
Join Date: Mar 2015
Posts: 2,984
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No one regrets getting a bigger engine.
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'04 Newmar Mountain Aire 4016
400ISL/Freightliner
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07-15-2018, 06:49 AM
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#6
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Junior Member
Join Date: Jun 2017
Location: Bennington, NE
Posts: 22
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Quote:
Originally Posted by MarkK
Who doesn't like to maximize mileage, but charging up a 6-7% grade at 60 sure is nice too.
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Especially when you are passing semis!!!
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Bob and Crystal
2018 Fleetwood Discovery LXE 40G
2017 Jeep Grand Cherokee Limited
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07-15-2018, 04:29 PM
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#7
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Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: May 2015
Posts: 245
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Engine brake over exhaust brake any day. Go with the ISL
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2004 Travel Supreme DS04
2014 Jeep Grand Cherokee Summit 
2002 Newmar DSDP 4095 Cummins ISC 350
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07-15-2018, 04:35 PM
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#8
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Senior Member
Join Date: Jul 2018
Posts: 117
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I've never heard ANYONE say that their coach has too much power!
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2017 Outback 330RL (stationary full timers)
2006 GMC 2500HD Crew Cab 4x4 Duramax
Dust Junkies Racing, 3 time Baja 1000 Class Champions
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07-15-2018, 05:32 PM
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#9
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Senior Member
Newmar Owners Club Workhorse Chassis Owner Spartan Chassis
Join Date: May 2010
Location: McAlester Ok
Posts: 2,057
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The formula is nothing over 100 lbs per horse power . If your ratio is over that you will have mountain problems
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2007 Newmar KSDP. 3912
2010 Nissan Frontier SE
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