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01-18-2018, 07:54 PM
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#43
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Senior Member
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 16,706
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Quote:
Originally Posted by vfauto
All right everybody could I get some HONEST answers on fuel economy? I am driving a 2017 DSDP with the Cummins 450 HP motor. Freightliner tells me I should get 8 to 12 MPG. I have never did any better than 6.5 mpg. I do not want to waste my time complaining and trying to resolve this if no one else does any better than I .
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Somebody lied to you!
Enjoy your fine coach.
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01-18-2018, 09:17 PM
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#44
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Senior Member
Join Date: Jun 2011
Posts: 1,015
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OK it took quite a bit of thinking and calculating but the guy is 100% correct, the Freightliner or even Spartan will get up to 12 mpg but that is just the bare chassis with no body, a lot less drag!
Mike
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01-19-2018, 03:04 AM
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#45
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Senior Member
Join Date: May 2014
Posts: 1,368
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[QUOTE=Dav L;3996941]
Quote:
Originally Posted by Dtwallace
18' Stacker?  |
I gotta have one of those, but I’m thinking I’d rather not go shorter than 24 foot. A shorter trailer would be harder to back up.
DTW
__________________
Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP
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01-19-2018, 03:06 AM
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#46
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Senior Member
Join Date: May 2014
Posts: 1,368
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Quote:
Originally Posted by Idleup
OK it took quite a bit of thinking and calculating but the guy is 100% correct, the Freightliner or even Spartan will get up to 12 mpg but that is just the bare chassis with no body, a lot less drag!
Mike
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LOL 
__________________
Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP
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01-19-2018, 06:23 AM
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#47
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Senior Member
Join Date: Nov 2017
Location: Citra, Florida
Posts: 1,396
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Quote:
Originally Posted by Idleup
OK it took quite a bit of thinking and calculating but the guy is 100% correct, the Freightliner or even Spartan will get up to 12 mpg but that is just the bare chassis with no body, a lot less drag!
Mike
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So that is what the salesman was talking about. 
__________________
Good Luck and keep us posted please. "Q"
1999 Newmar, Mountain Aire 3768, V-10, CAI, Headers.
"Spending our kids inheritance one trip at a time"
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01-19-2018, 07:05 AM
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#48
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Senior Member
Monaco Owners Club Newmar Owners Club Texas Boomers Club Spartan Chassis
Join Date: Jan 2010
Location: New Braunfels, Texas
Posts: 1,308
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Quote:
Originally Posted by brynwood
I have another tool to throw in the cog... My 2012 jeep wrangler v6 4dr auto, gets avg 16 mpg here in Florida tow it to Houston, it gets avg 21 mpg while we are there... why is that. We sometimes have fuel bought here in Florida that we use in Houston, sometimes fuel bought in Houston, we use up in Florida...same result
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Everything’s bigger and better in Texas!
Fuels a lot cheaper in Texas too. How do I know? I’m sitting here in Florida.
__________________
Dan & Linda
FMCA 399045 NKK 22240
2020 Dutch Star 4081 - Spartan K2
2017 Dutch Star 4018 - Sold - Towing Jeep Grand Cherokee Trailhawk
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01-19-2018, 08:22 AM
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#49
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Senior Member
Winnebago Owners Club
Join Date: Mar 2014
Posts: 14,891
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Quote:
Originally Posted by Idleup
OK it took quite a bit of thinking and calculating but the guy is 100% correct, the Freightliner or even Spartan will get up to 12 mpg but that is just the bare chassis with no body, a lot less drag!
Mike
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Sorry you cant drive that on the highway. No seat belt!! A seat would be a good thing as well.
__________________
Gordon and Janet
Tour 42QD/InTech Stacker
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01-19-2018, 10:30 AM
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#50
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Apr 2015
Location: Dallas, TX area
Posts: 634
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The Secrets of Better Fuel Economy Cummins
Copy and paste in your browser
Do a Google search and check out what Cummins has to say about fuel economy.
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01-19-2018, 11:11 AM
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#51
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,559
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No way a DP gets 12 mpg. I average between 7-7 1/2 mpg. Coming down a sustained grade maybe more.
__________________
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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01-19-2018, 11:17 AM
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#52
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Senior Member
Newmar Owners Club Freightliner Owners Club Entegra Owners Club
Join Date: Nov 2015
Location: AZ
Posts: 6,425
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Quote:
Originally Posted by rvbiker45
The Secrets of Better Fuel Economy Cummins
Copy and paste in your browser
Do a Google search and check out what Cummins has to say about fuel economy.
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https://cumminsengines.com/uploads/d...el_economy.pdf
__________________
Newmar 2016 Canyon Star 3710
Newmar 2018 Dutch Star 4369 SP
Newmar 2023 Dutch Star 4369 FL
Entegra 2025 Cornerstone 45D on order
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01-19-2018, 11:25 AM
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#53
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Senior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Jan 2017
Location: Pittsburgh PA
Posts: 227
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7 to 7.5 is good
I recently attended camp freightliner and learned about the "economy" mode on the allison tranny? (Being a newbie I never touched that thing till after the FL class lol) Low and behold we do seem to be getting better mileage in the ECO mode...(went from 6.5 to 7.5 on average maybe?) The instructor said we should be able to get 8 on average - but that might be going down hills or on level roads all the time! Plus - we just got out of boating where we got 1 mile to the gallon - on a good day - so to me...7 to 7.5 ain't that bad!
Good luck, happy glamping!
__________________
pghbob and maria 
2017 Fleetwood Discovery 40G, 2015 VW Beetle toad on Acme Tow Dolly
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01-19-2018, 11:27 AM
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#54
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Senior Member
Newmar Owners Club Freightliner Owners Club Entegra Owners Club
Join Date: Nov 2015
Location: AZ
Posts: 6,425
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Freightliner tells me I should get 8 to 12 MPG 🤯🤬
Rvbiker45, thank you, even though it’s geared toward semi’s I found a lot of great info. Stuart
__________________
Newmar 2016 Canyon Star 3710
Newmar 2018 Dutch Star 4369 SP
Newmar 2023 Dutch Star 4369 FL
Entegra 2025 Cornerstone 45D on order
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01-19-2018, 11:46 AM
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#55
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Apr 2015
Location: Dallas, TX area
Posts: 634
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Quote:
Originally Posted by Stuart W
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Thanks Stuart, I could not get my computer to make the link active.
Don
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01-19-2018, 11:52 AM
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#56
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Senior Member
Newmar Owners Club Freightliner Owners Club Entegra Owners Club
Join Date: Nov 2015
Location: AZ
Posts: 6,425
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Quote:
Originally Posted by rvbiker45
Thanks Stuart, I could not get my computer to make the link active.
Don
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No problem Don, very interesting information, some things I knew but quite a few of the variables were new to me.
__________________
Newmar 2016 Canyon Star 3710
Newmar 2018 Dutch Star 4369 SP
Newmar 2023 Dutch Star 4369 FL
Entegra 2025 Cornerstone 45D on order
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