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

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-25-2013, 08:44 PM   #1
Senior Member
 
Join Date: Mar 2012
Posts: 161
Anthem mileage vs. Cornerstone

I noticed on another thread earlier that someone had been told by an Entegra factory rep. that there is a considerable difference in the fuel mileage between an Anthem and Cornerstone. Would really like to hear what the owners have to say about this. I know that all of this will depend on lots of different variables (driving speeds, weight of toads, flat or mountains, acceleration, etc.) but would like to get a "feel" for what everyone is experiencing.

Let the fun begin
__________________

__________________
Chuck, Judy, Sam and Willie (The Boys)
2013 Anthem 44 DLQ
2007 GMC 2500 HD 4wd
iquailhunter 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 03-25-2013, 08:49 PM   #2
Senior Member
 
Mr_D's Avatar
 
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 11,710
I wouldn't even consider the fuel mileage when looking at a new rig, it's really a minor part of the cost of ownership.
__________________

__________________
2002 Newmar Dutch Star 4090 ISC 350/1050 with Banks Kit, now at least 435/1200
Charter Good Sam Lifetime Member, FMCA f47302s, SKP 118205
RV'ing since 1957, NRA Benefactor Life Member
Mr_D is offline   Reply With Quote
Old 03-25-2013, 09:02 PM   #3
Senior Member
 
DSL417's Avatar


 
Entegra Owners Club
Join Date: Sep 2012
Posts: 3,828
Blog Entries: 2
I can't speak Cornerstone, but I have to say...it REALLY depends.

I have averaged as little as 4.9 mpg (quartering, head, or crosswind of 30-45 mph winds and a hellish 300 miles) to 9.5 mpg (flat with tailwind of 20-25 mph).

Overall, I have averaged about 7 mpg over 3000 miles the last three months, pulling 7500 lbs of pickup and Harley. I usually run at 60 mph on the cruise.

That also includes 81 hours of generator and quite a bit of aqua hot usage in the last month.

X2 on cost of ownership. If you can afford the Cornerstone, the the gas milage diff between Cornerstone and Anthem is a minor cost of ownership.
__________________
Dave and Beth
2015 Cornerstone 45J
Ford F-150 and '09 Harley Ultra Classic
DSL417 is offline   Reply With Quote
Old 03-25-2013, 09:05 PM   #4
Senior Member
 
Join Date: Mar 2012
Posts: 161
The question was not asked to determine what I wanted to buy. I am just curious about the real difference in fuel consumption between the two models.
__________________
Chuck, Judy, Sam and Willie (The Boys)
2013 Anthem 44 DLQ
2007 GMC 2500 HD 4wd
iquailhunter is offline   Reply With Quote
Old 03-25-2013, 09:14 PM   #5
Senior Member
 
DSL417's Avatar


 
Entegra Owners Club
Join Date: Sep 2012
Posts: 3,828
Blog Entries: 2
Sorry, I should have noted and thought about the person asking the question as I know you have a new rig. So what are you getting?
__________________
Dave and Beth
2015 Cornerstone 45J
Ford F-150 and '09 Harley Ultra Classic
DSL417 is offline   Reply With Quote
Old 03-30-2013, 11:49 AM   #6
Moderator Emeritus
 
Cruzer's Avatar


 
Join Date: Oct 2002
Location: Sheboygan, WI
Posts: 2,873
These are always interesting comparisons. The biggest problem is in getting accurate comparisons. Engines are like big air pumps and the more air they pass, they more fuel they also pass. In an ideal world a small displacement engine turning at slows RPMS would give you best fuel economy. However, you can only move so much weight so that's where the compromises come in.

The big 600 HP ISX in the K3 has a larger displacement engine than the Mountain Master's 450 HP ISL so it's going to move more air. However, there is so much bottom end torque in that engine that it dosn't need to downshift as much so it keeps it's revs lower. Also, the final drive ratio is lower due to the taller rear axle gearing so that also keeps the revs lower during normal cruising speeds. I would suspect that one helps offset the other but probably doesn't completely compensate so the ISX probably moves more fuel through it.

The biggest factor in any fuel calculation is wind resistance. Driving at 10 MPH produces 100 pounds per square foot (PSF) of wind resistance. On a typical motorhome that's 10,625 lbs of resistance due to the large frontal area.

At 55 MPH that goes up to 3,025 PSF, which is around 321,406 lbs of total resistance. Yes, it takes horsepower to move that air out of the way so the fuel usage goes up as the speed increases.

At 70 MPF it goes up to 4,900 PSF, which equates to 520,625 lbs of total resistance. At 80 MPH it goes up to 6,400 PSF, which yields a wopping 680,000 lbs of resistance. You are trying to move 340 tons of air when driving at that speed so you will burn some serious fuel at 80 MPH. Many drivers report that they will see a 1 MPG difference for every 10 MPH at highways speeds so driving 55 versus 75 will take you longer to get there but you'll make less trips to the bank to withdraw fuel money.

Also, keep in mind that a 20 MPH headwind when driving at 60 MPH is the same thing as driving at 80 MPH with no headwind.
__________________

__________________
Mark & Leann Quasius
2007 Allegro Bus 42QRP - Cummins 400 ISL
2012 Jeep Wrangler Unlimited - Rubicon
Cruzer is offline   Reply With Quote
Reply



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
2009 F350 6.4 increase fuel mileage Trent McCain Powerstroke Engine Forum 14 08-15-2013 07:52 AM
Anthem 44SL Trose Entegra Owner's Forum 7 01-27-2013 07:27 PM
2013 Anthem and Cornerstone racefn Entegra Owner's Forum 35 03-04-2012 02:05 PM
Monaco fuel mileage mizoola Monaco Owner's Forum 3 08-10-2011 09:31 PM
Mileage JDT Monaco Owner's Forum 15 09-06-2009 06:00 PM

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:26 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.