Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-11-2012, 06:55 PM   #1
Winnebago Camper
 
highcountry's Avatar
 
Join Date: May 2011
Posts: 7
400 Cummins mileage help

I have a 07 Winnebago Tour 40FD. I tow a 02 Jeep Liberty. I can only muster about 6 MPG @62MPH. I have had other DP's and have always managed to get between 8-10 including an Eagle which was much heavier. I have talked to Cummins and they want to put it on a Dyno at a cost of 4-500. Anyone have any experience with this? Would I be better off spending the money on a chip or Fans, or breathers, or, or, or?
__________________
Del and Loretta + Hirem the beagle
07 Tour 40FD and 02 Jeep Liberty
USS Frank E Evans DD754-Lest we forget
highcountry is offline   Reply With Quote
Old 03-11-2012, 07:01 PM   #2
Winnebago Camper
 
bdaball's Avatar
 
Join Date: Aug 2003
Location: MAINE, The way Life should be.
Posts: 18
Quote:
Originally Posted by highcountry View Post
I have a 07 Winnebago Tour 40FD. I tow a 02 Jeep Liberty. I can only muster about 6 MPG @62MPH. I have had other DP's and have always managed to get between 8-10 including an Eagle which was much heavier. I have talked to Cummins and they want to put it on a Dyno at a cost of 4-500. Anyone have any experience with this? Would I be better off spending the money on a chip or Fans, or breathers, or, or, or?
Welcome Highcountry,
Regardless of the feedback you get here, don't forget to log on to the Freightliner Chat room every Wednesday evening at 9PM EST/DLST. You will meet a great bunch of freightliner guys who have answers to anything you could ever imagine. Well almost everything.

And the best part it is free.........!
__________________
Tiffin Allegro Bus, 425 Cummins powered Freightliner XCR, Camp Freightliner, Honda CRV, tow-N-4 Down, U.S. Gear Unified Tow brake, Blue-OX tow bar, TST Monitors, Seelevel II Monitors, Samsung Res Fridge, Progressive 50A-EMS, No Kids-No Pets, Full Time.
bdaball is offline   Reply With Quote
Old 03-11-2012, 07:16 PM   #3
Winnebago Owner
 
bluepill's Avatar
 
Join Date: Jan 2011
Location: Pensacola, FL
Posts: 139
some thoughts:

1. check your brake rotor/drum temps on both the MH and the toad with an IR thermometer after driving at speed with little brake usage for 20 minutes or more. Any high reading indicates drag.

2. Monitor your transmission shift pattern for abnormal shift points. If your trans has a selection of power and economy, use the economy mode.

3. Don't forget that onboard diesel generator use increases consumption.

4. Make sure that the coolant temperature comes up to normal (180-190 deg.) fairly quickly (5-10 minutes of driving)

5. A radiator fan that stays in High Cooling mode uses as much as 75 horsepower.
__________________
2008 Itasca Meridian 37H & 2015 Flagstaff T12RBST
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months - Woo Woo
[SIGPIC][/SIGPIC]Yellowstone Lake 6-1-2012
bluepill is offline   Reply With Quote
Old 03-11-2012, 07:20 PM   #4
Winnebago Camper
 
highcountry's Avatar
 
Join Date: May 2011
Posts: 7
As an old truck driver, I do check the heat of the tires/hubs by hand. The tranny seems to shift very well. I do use the econo mode. Thanks
__________________
Del and Loretta + Hirem the beagle
07 Tour 40FD and 02 Jeep Liberty
USS Frank E Evans DD754-Lest we forget
highcountry is offline   Reply With Quote
Old 03-11-2012, 08:28 PM   #5
Winnebago Owner
 
RVThere's Avatar
 
Join Date: Aug 2008
Location: Florida Keys
Posts: 112
I have a 2007 Tour 40TD with the 400 hp Cummins and your mileage is right in line with what I have been getting for close to 50K miles pulling a Jeep GC.

When I see 7 mpg (with a tail wind going down hill), I jump for joy!
__________________
Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
'17 Winnebago View 24V, '02 R-Vision B+
RVing for 19 years & 150,000+ miles
RVThere is offline   Reply With Quote
Old 03-12-2012, 06:16 PM   #6
Winnebago Master
 
Petro's Avatar
 
Join Date: Dec 2003
Location: Weyauwega, WI US
Posts: 1,483
Quote:
Originally Posted by highcountry View Post
I have a 07 Winnebago Tour 40FD. I tow a 02 Jeep Liberty. I can only muster about 6 MPG @62MPH. I have had other DP's and have always managed to get between 8-10 including an Eagle which was much heavier. I have talked to Cummins and they want to put it on a Dyno at a cost of 4-500. Anyone have any experience with this? Would I be better off spending the money on a chip or Fans, or breathers, or, or, or?
I am doing about the same as you. If I get 7.5 MPG I jump for joy. Normally 6.5 -7 is about average. My thoughts are that the more horses we have the more they eat. bdaball gave you good advice. Join us on the Freightliner Chat on Wednesday nights. It is time well spent.

Don
__________________
Don & Bev Morgan Weyauwega WI, 05 Itasca Horizon 40KD, 400 HP Cummins, Delorme GPS LT 40, Toad 07 Saturn Vue AWD, Air Force One, TST 510 TPMS, Mayor of Weyauwega 2007 - 2013, Waupaca Co Board Supervisor 2010 - 2014
Petro is offline   Reply With Quote
Old 03-12-2012, 06:44 PM   #7
Winnebago Owner
 
Join Date: Aug 2006
Location: Madison, SD
Posts: 175
I had a 2008 40' TD Tour with the 400 and averaged 8.1 for 35,000 miles towing a Chev. HHR. I usually drove at about 58mph and noticed a big difference in mileage driving at 57-58 and 62-64.

Interestingly, I get over 8.5 in our 2010 42' Tour AD with the tag axle (over 12,000 miles so far). This is a heavier rig and does not have the urea injection. I have noticed that the transmission program shifts into 6th at a lower rpm than the 40TD did.
__________________
Rick

2010 Winnebago Tour 42AD
rv rick is offline   Reply With Quote
Old 03-12-2012, 06:53 PM   #8
Winnebago Master
 
Mr_D's Avatar
 
Join Date: May 2011
Location: Vancouver, WA
Posts: 560
Does seem kind of low. Our ISC 350 (now 435/1200 with the Banks kit) gets 7.5 to 8 overall (incl gen usage). On my VMSpc and the flats I can see 14-16mpg and 3 mpg going up some hills or 70 mph into a very stiff headwind. I also see 256 mpg going down hills. Take your pick!!
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Lifetime GS Member, SKP, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
Mr_D is offline   Reply With Quote
Old 03-12-2012, 07:18 PM   #9
Winnebago Camper
 
Ralph A's Avatar
 
Join Date: May 2010
Posts: 34
I'm getting a good solid 8.5 mpg with my 2005 Horizon AD40 & 400 hp Cummins now towing a 2011 Jeep Wrangler Unlimited but was towing a 2005 Honda CRV. I have 75,000 miles on the rig; about 70,000 towing the Honda and 5,000 with the Jeep in tow. My last 5,000 with the Jeep averaged 8.38 mpg. I drive the speed limits not to exceed 75 mph. I have always used a diesel additive. These are actual mpg readings, not the readings off the Information Center which usually show about a 9.0 range.
__________________
2005 Itasca Horizon 40AD (Full-Timer)
2015 Jeep Cherokee Trailhawk
Air-Force One toad brake
Ralph A is offline   Reply With Quote
Old 03-13-2012, 02:36 AM   #10
Winnebago Owner
 
kjburns's Avatar
 
Join Date: Dec 2009
Location: Tucson, AZ
Posts: 184
Quote:
Originally Posted by rv rick View Post
I had a 2008 40' TD Tour with the 400 and averaged 8.1 for 35,000 miles towing a Chev. HHR. I usually drove at about 58mph and noticed a big difference in mileage driving at 57-58 and 62-64.
We had exactly the same (8.1 mpg) showing on our trip computer, towing a 2010 Grand Cherokee. I don't know how accurate the computer is and didn't verify the results, but it's probably accurate within a few percentage points.
kjburns is offline   Reply With Quote
Old 03-13-2012, 10:24 AM   #11
Winnebago Camper
 
Join Date: Apr 2011
Posts: 49
Here is my $.02 worth: After 10 years and 50,000 miles on a Country Coach 350 Cummins, I don't think I ever say the good side of 7 MPG. Mostly in the 6's. There is a good old adage: "There are two things a man will lie about. One is gas mileage" Frankly, I think most mileage guestimates come from the gauges, and some come from wishful thinking. The only way to know for sure is the old fashioned way of filling the tank and calculating by pencil (or pen). My VMS engine monitor always read higher than actual. The factory installed calculator was off nearly 2 MPG.

When you consider your driving habits plus terrain and wind, the variables go up. These dang things just aren't built for mileage are they? Don't ya just love em?
__________________
'06 Adventurer. Number 12 motorhome over 51 years of RV'ing.
cardiffman is offline   Reply With Quote
Reply

Tags
cummins


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mile per gallon.....400 Cummins rebelsbeach Winnebago General Discussions 14 01-25-2006 02:07 AM
New 400 Cummins Over heating!!! Lucchese1 General Maintenance and Repair 8 07-21-2005 07:52 PM

» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:27 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.