RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Entegra Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 05-26-2015, 09:31 AM   #15
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 18,495
Quote:
Originally Posted by Twomed View Post
https://cumminsengines.com/uploads/d...el_economy.pdf

Really good read...

The "secret" has ben out for quite awhile. Speed kills dinosaurs, or rather their juices.

Here's similar document from Caterpillar.
Info on route selection and the effect on economy, and the % advantage of maintaining constant speed , are the items that interest me the most.
Attached Files
File Type: pdf Cat_RV_Performance.pdf (246.3 KB, 80 views)
__________________

__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-26-2015, 09:48 AM   #16
Senior Member
 
Gordon Dewald's Avatar
 
Winnebago Owners Club
Join Date: Mar 2014
Posts: 12,663
Although the sample size was woefully inadequate it does show information that seems to be real world practical.

A larger sample would be better if conditions were the same for all of the tests. Unfortunately outside factors like wind, tuneup, atmospheric conditions, temperature, tire pressure will affect the tests.

I agree with the results, scientific or not.
__________________

__________________
Gordon and Janet
Tour 42QD/InTech Stacker
Gordon Dewald is offline   Reply With Quote
Old 05-26-2015, 11:18 AM   #17
Senior Member
 
dave&ginny's Avatar
 
Join Date: Feb 2012
Location: Peoria IL
Posts: 1,348
I don't worry about it too much. If one or 2 mpg was going to break my budget I wouldn't have such a big motor home. I figure I bought a diesel hog.....but I enjoy it.
__________________
2015 Entegra Aspire RBQ
Pusher.. 2016 Ram Limited 2500 Crew Cab 6.7 diesel
Blue Ox Avail, Air Force One
dave&ginny is offline   Reply With Quote
Old 05-26-2015, 12:44 PM   #18
Senior Member
 
Thunderfoot's Avatar
 
Monaco Owners Club
Join Date: Jul 2014
Location: Texas Hill Country
Posts: 474
Hi Jeff, a 53% difference in gallons used vs speed (calculated from the data in your post) is impressive! I know much of your route experienced severe weather with flooding over the weekend but it sounds like you fared well.
__________________
'98 Signature 42' Classic Suite purchased July 2000
Toads: (4 down) Jeep Grand Cherokee, Chevy 2500HD 4x4, or Scout Terra
Trailers: 28' HRC Stacker, 24' Look; contents vary per trip
Thunderfoot is offline   Reply With Quote
Old 05-26-2015, 01:44 PM   #19
Senior Member
 
brobox's Avatar


 
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 21,270
Jeff, your post was very beneficial to me as I have a new engine and can relate to the MPG difference with speed. I see all these post of 7.3 to 10 MPG with Entegra's and I was scratching my head. I'll have a better feel for my millage this summer and if it stays bad, it will go on a computer at Cummins along the way. Thanks for your post, I enjoyed it.
__________________
Chuck in SW FL
A "Digital" 2019 Cornerstone "B"
A "Classic" 2014 Anthem 42 RBQ---Sold
2016 Colorado Z71 PU
brobox is offline   Reply With Quote
Old 05-26-2015, 02:03 PM   #20
Senior Member
 
OB-One's Avatar
 
Join Date: Oct 2012
Posts: 323
We average 6.0 to 6.3 mpg with the cruise set on 65 mph. Kick it up to 80 mph and the mileage drops to 4.8 to 5.0 mpg. On very rare occasions the time saved is worth the added expense, but very rarely.
OB-One is offline   Reply With Quote
Old 05-26-2015, 02:09 PM   #21
Senior Member
 
CampDaven's Avatar


 
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 16,118
Blog Entries: 1
Quote:
Originally Posted by OB-One View Post
We average 6.0 to 6.3 mpg with the cruise set on 65 mph. Kick it up to 80 mph and the mileage drops to 4.8 to 5.0 mpg. On very rare occasions the time saved is worth the added expense, but very rarely.

OTOH, exceeding max tire speed can be all that it's Cracked Up to be.
__________________
Dave and Nola, RVM1
The Journey is Our Destination!

http://davenola.blogspot.com/
CampDaven is offline   Reply With Quote
Old 05-26-2015, 03:33 PM   #22
Senior Member
 
OB-One's Avatar
 
Join Date: Oct 2012
Posts: 323
Quote:
Originally Posted by CampDaven View Post
OTOH, exceeding max tire speed can be all that it's Cracked Up to be.
Maximum tire speed is not an absolute number, the details matter greatly.
OB-One is offline   Reply With Quote
Old 05-27-2015, 06:35 PM   #23
Senior Member
 
Jburklo's Avatar
 
Join Date: Jul 2012
Location: New Braunfels, TX
Posts: 358
450 Cummins on 2012 Aspire DEQ
Jburklo is offline   Reply With Quote
Old 05-27-2015, 06:37 PM   #24
Senior Member
 
Jburklo's Avatar
 
Join Date: Jul 2012
Location: New Braunfels, TX
Posts: 358
All

Thanks for the informative replies. As stated not scientific but the results were interesting. Great info sharing on this forum and look forward to seeing y'all down the road.

Jeff
Jburklo is offline   Reply With Quote
Old 05-27-2015, 07:14 PM   #25
Registered User
 
Join Date: Feb 2012
Location: Troy Mo
Posts: 1,951
Quote:
Originally Posted by Jburklo View Post
All

Thanks for the informative replies. As stated not scientific but the results were interesting. Great info sharing on this forum and look forward to seeing y'all down the road.

Jeff
I don't think there's suppose to be, but I swear there's a difference in diesel fuel cetane rating. Coming to Kerrville Tx from Fl my first fill up, which was very slow, so I know it was full I got 7.3 mpg. Next fill up at different truck stop I got 8.7 mpg. All driving on interstate 75&10 same speed. I know there's going to be some variance, but that seems excessive. Noel
loisjop is offline   Reply With Quote
Old 05-27-2015, 07:22 PM   #26
Registered User
 
Join Date: Feb 2012
Location: Troy Mo
Posts: 1,951
Quote:
Originally Posted by hogdriver View Post
I need to try it. I might hate it. But I gotta know.

Here's the weird thing about speed vs fuel. In my day job(nite-day-more nite job) I just flew a B777 jet from Shanghai to Memphis at max aircraft weight for takeoff. It takes 14 hrs and about 275k lbs of fuel (roughly 65,000 gals). As part of my job, when we reach level off we evaluate time vs fuel. If I fly a speed (called Mach) that is 5% more. I reach my destination about 8 mins sooner over 14 hrs yet costs about 2000lbs or about $1000. At 10% more speed the costs are even crazier yet the time changes little.

I'm thinking the tortoise vs the hare might have some benefits. Plus it has to be easier on tires, engines, and running gear,
Dave, do you work for Fedex? That's one of their flights since they finished the long runway in Mem a few yrs ago. Most still go through ANC though. What Mach do you fly, around .87? Of course it's easier coming East at least ground speed is higher. Noel
loisjop is offline   Reply With Quote
Old 05-27-2015, 09:59 PM   #27
Senior Member
 
wmpbauer's Avatar
 
Join Date: Jun 2010
Location: Sun City Center, FL
Posts: 1,821
Send a message via Yahoo to wmpbauer
Interesting that during my trip across Louisiana, Mississippi, and Alabama today, we had quite variable wind conditions. Those who have recently made this trek, know that it's about as flat as any terrain can get.

When fighting a headwind (@2:00) I'd get instant MPG of 7.3-7.8.

When we had a period of relative quiet, I'd get instant MPG of 10.7-11.6.

I reset my MPG average when I departed Florida for the Texas rally. My current reading today on my return leg (Bella Terra in Foley, AL) is 8.7 MPG. Driving a '13 Aspire (Cummins 450). This includes my idling time but not generator use. These are also consistent with my computed numbers over this trip of 1,942 miles so far.

I drive @ 63mph and mostly on cruise with the ECONO Mode engaged.

Pat
__________________
Pat & Medarda Bauer; Tess and Tighe (our fur kids)
2017 Entegra Anthem/FL/Allison/Grand Cherokee
Entegra Coach Owners Association, President
Sun City Center, FL
wmpbauer is offline   Reply With Quote
Old 05-27-2015, 10:29 PM   #28
Senior Member
 
Jburklo's Avatar
 
Join Date: Jul 2012
Location: New Braunfels, TX
Posts: 358
Pat. How do you engage ECONO mode? Have not heard of that. I also have an Aspire and run with my generator on. Interesting fuel usage given the winds.

Thanks
Jeff
__________________

Jburklo is offline   Reply With Quote
Reply

Tags
diesel



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
Checking out The Diesel Torque guestPacer Trailer Towing and Tow Vehicles Discussion 9 02-20-2015 09:24 AM
Speed Sensor for P32 2003 WHC 6.5 Diesel Turbo Auto Kiwi Bill Workhorse and Chevrolet Chassis Motorhome Forum 6 01-13-2015 05:04 PM
Hmmm... rethinking the diesel vs gas argument! cptgregger iRV2.com General Discussion 59 01-02-2015 08:52 AM
B20 Bio Diesel traveler of california iRV2.com General Discussion 31 06-02-2014 11:19 AM
Hydronic heat: Propane vs Diesel in winter temps? TinMan Trvlr RV Systems & Appliances 10 03-31-2014 02:32 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:33 PM.


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