Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 05-04-2014, 01:06 PM   #1
Junior Member
 
Join Date: May 2014
Posts: 1
CAT C13 Fuel Economy (2005)

I have a Country Coach Magna and am new to this coach. The engine is a C13. Fuel economy is running about 5.5 on a good day and less when facing wing etc... I am interested in any tips I can get regarding improvement. My previous coach (Cummins 400ISL) got 8 mpg.

Thanks in advance.
__________________

__________________
pjohnson6214 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 05-04-2014, 01:41 PM   #2
Senior Member
 
distaff's Avatar
 
Join Date: Dec 2009
Posts: 1,191
Quote:
Originally Posted by pjohnson6214 View Post
I have a Country Coach Magna and am new to this coach. The engine is a C13. Fuel economy is running about 5.5 on a good day and less when facing wing etc... I am interested in any tips I can get regarding improvement. My previous coach (Cummins 400ISL) got 8 mpg.

Thanks in advance.
I get about 7 mpg towing a Suburban (about 48,000 lbs) in the mountains, 7.3 mpg not towing (about 42,000 lbs) on flat-ish ground.

That info comes from the ECU, actual consumption includes use of the genset and aquahot. It seems consistent with my fills when driving, so I think it is representative.

The obvious suggestion is to make sure your ECU has the latest software, then consult a CAT specialist. I have not read any convincing information about mileage improvement add ons.
__________________

__________________
Paul
2006 Patriot Thunder C13 Allison 4000
2010 Ford Flex Ecoboost AWD
distaff is offline   Reply With Quote
Old 05-05-2014, 07:17 AM   #3
Senior Member
 
Join Date: Oct 2009
Posts: 804
fuel

I have contacted a RV performance specialist regarding this. They have a new ECM chip that he states "have a written guarantee that the chip will increase the fuel mileage by 1 mpg or better". The company has installed them in several truck fleets. I am getting one. I'll try and remember to post how it works.

safe travels
__________________
FLYING BUTCH is offline   Reply With Quote
Old 05-05-2014, 08:38 AM   #4
Senior Member
 
distaff's Avatar
 
Join Date: Dec 2009
Posts: 1,191
FLYING BUTCH - is that a new ECM or a new flash on the ECM?

Do please post you results - we have not had much follow up on some of the mods so far.
__________________
Paul
2006 Patriot Thunder C13 Allison 4000
2010 Ford Flex Ecoboost AWD
distaff is offline   Reply With Quote
Old 05-05-2014, 08:59 AM   #5
Senior Member
 
TBS-POPS's Avatar
 
Join Date: Nov 2013
Location: Valley Springs, Ca
Posts: 368
5.5 with a cat, damn!! Glad I've got a cummins!!!! 8 tow, 11 no tow.
__________________
2018 Vilano 375FL
2017 F-350 CC DRW 6.7
TBS-POPS is offline   Reply With Quote
Old 05-05-2014, 09:04 AM   #6
Senior Member
 
Steve Ownby's Avatar
 
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,399
Quote:
Originally Posted by pjohnson6214 View Post
I have a Country Coach Magna and am new to this coach. The engine is a C13. Fuel economy is running about 5.5 on a good day and less when facing wing etc... I am interested in any tips I can get regarding improvement. My previous coach (Cummins 400ISL) got 8 mpg.



Thanks in advance.

Cats are not particularly known for their fuel economy, but your Cat is 13 liter vs 9 liter for the ISL. The magna is heavy metal and that's a big factor also.


Steve Ownby
Full time since '07
__________________
Steve Ownby
Full time since 2007
2003 Monaco Signature
Steve Ownby is offline   Reply With Quote
Old 05-05-2014, 06:22 PM   #7
Senior Member
 
slemnah's Avatar
 
Join Date: Jan 2011
Location: Santa Clarita, CA
Posts: 811
That is pretty much what I am getting in a 2005 Safari Panther. I have added a power harness to increase the boost and haven't had the opportunity to doing a long range fuel mileage test. If you look in the powertrain section under CAT you can find my threads. Also, send me a PM message and let's talk about what I have found out.
Steve
__________________
slemnah is offline   Reply With Quote
Old 05-05-2014, 11:41 PM   #8
Senior Member
 
distaff's Avatar
 
Join Date: Dec 2009
Posts: 1,191
You will get may helpful posts about how a Holiday Rambler Endeavor gets better mileage with a Cummins, sort of like how a 737 uses less fuel with GE engines than a 747 with Rolls Royce engines.

This will help: http://http://www.rvtechlibrary.com/...erformance.pdf

Your Country Coach Magma is a big coach, and you need a lot of power to move it. How you drive matters, and so does where you drive, but also, make sure you have a current ECU flash. Call CAT with your engine serial number and they will tell you if you have a current version (they keep excellent records). The upgrade is free, but you have to pay someone at a CAT dealer to do the flash.
__________________
Paul
2006 Patriot Thunder C13 Allison 4000
2010 Ford Flex Ecoboost AWD
distaff is offline   Reply With Quote
Old 05-06-2014, 07:55 AM   #9
Senior Member
 
Coma's Avatar
 
Monaco Owners Club
Join Date: Nov 2010
Location: The Emerald Coast
Posts: 1,757
Welcome to IRV2!

You don't mention if you have prior experience with MH's or diesels. The ECU between your ears is the most important one. If the MH is driven like a minivan, fuel mileage will suffer. Imagine an egg between your foot and the fuel pedal, drive like that and see if it makes a difference. Operator technique makes the single largest difference in fuel economy and other operating costs. The Link distaff posted is a very good place to start.
__________________
Jim and Jennie, Cats=Bittles and Potter, 2000 Dynasty 350 ISC
2013 Silverado 4x4 Towed with R1200GS in bed.
PROV23:4 Do not wear yourself out to get rich; have the wisdom to show restraint.
Coma is offline   Reply With Quote
Old 05-07-2014, 09:00 AM   #10
Senior Member
 
Join Date: Oct 2009
Posts: 804
Fuel

I have a friend who had this company put a banks system on his Cummings. I drove his coach and couldn't believe the power and he is 9mpg! I called the RV performance shop that put his system in. They told me that they have a new chip (comes with factory wireing and connectors). Shop owner told me the chip provider has a written guarantee the chip will increase mpg by at least 1 and on my c15 increase hp 100. I penciled it out and it would take a lot of miles to pay for the chip but my coach only has 40k and plan on keeping it. My old c12 would get 7mpg and had all the power I needed. I've bee around diesels for some time and I just don't want to drive 55, although I have tried below 60 with this c15 and only improvement was 5.7. 68 mph 5.5?? Plan on having chip installed in July when we go to northwest to the shop and for the summer. I'll post my results.

Safe travels all
__________________
FLYING BUTCH is offline   Reply With Quote
Old 05-07-2014, 11:40 AM   #11
Senior Member
 
Ron_H's Avatar
 
Newmar Owners Club
Join Date: Apr 2014
Location: White Rock, BC
Posts: 753
Quote:
Originally Posted by distaff View Post
You will get may helpful posts about how a Holiday Rambler Endeavor gets better mileage with a Cummins, sort of like how a 737 uses less fuel with GE engines than a 747 with Rolls Royce engines.

This will help: http://http://www.rvtechlibrary.com/...erformance.pdf

Your Country Coach Magma is a big coach, and you need a lot of power to move it. How you drive matters, and so does where you drive, but also, make sure you have a current ECU flash. Call CAT with your engine serial number and they will tell you if you have a current version (they keep excellent records). The upgrade is free, but you have to pay someone at a CAT dealer to do the flash.
It appears the above link is incorrect. The following correctly formatted link should get you there:
CAT RV Performance Guide
__________________
Ron_H is offline   Reply With Quote
Old 05-07-2014, 09:44 PM   #12
Senior Member
 
B Bob's Avatar
 
Join Date: Sep 2010
Posts: 1,162
We have a 2002 Country Coach Affinity 42'. It has a C12 with 505 hp. We get over 7mpg. Normally about 7.4 or 7.5. I would guess something is wrong with your motor. How much boost are you getting? Check the computer going up a hill with heavy accelerator. Is you computer saying you are getting full power and torque and over 20 psi of boost. If not something is leaking. Might be "boots" on turbo pipe or the charge air cooler. We had to replace our charge air cooler last year and our power went way up immediately.

When we go up long big hills our mpg is less of course. But then when we go down long big hills it goes way up. I always like taking an mpg read after a 10 mile down hill. So nice to read 13 or 14 mpg.
__________________
B Bob
Country Coach 42' Affinity
2013 Jeep Wrangler Unlimited
B Bob is offline   Reply With Quote
Old 05-07-2014, 10:10 PM   #13
Senior Member
 
slemnah's Avatar
 
Join Date: Jan 2011
Location: Santa Clarita, CA
Posts: 811
B Bob, the C13 and C15 engines are ACERT engines that have been tuned to lower emissions starting in 2004. They have a history of low fuel mileage complaints. They also have a two stage turbo set up that is a bit problematic and feel like they are lower on power than they should be even with over 40lbs of boost. I am working on trying to increase my fuel mileage but I don't see it getting that much better unless I drop a bunch of money into it.
Steve
__________________
slemnah is offline   Reply With Quote
Old 05-07-2014, 10:34 PM   #14
Senior Member
 
distaff's Avatar
 
Join Date: Dec 2009
Posts: 1,191
Thanks Ron. Don't know why that link doesn't work when I copied in here.

Flying Butch - a lot of claims about mileage leave out important details - weight of coach, where you drive, time of year, etc. I get about 7 MPG weighing in at about 46,000 lbs. That is mountain driving almost exclusively, but it is also Western driving - meaning 7 to 8 hours with no traffic congestion. Stop and go on an Eastern interstate would demolish my mileage. I can set my cruise control out here and not touch it for 2 to 3 hours.

If you do get a new chip, by all means, please report your results.
__________________

__________________
Paul
2006 Patriot Thunder C13 Allison 4000
2010 Ford Flex Ecoboost AWD
distaff is offline   Reply With Quote
Reply

Tags
cat, fuel



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
2005 Acert C13 low power and poor fuel economy slemnah Caterpillar Engine Forum 29 04-15-2014 05:26 PM
The Secrets of Better Fuel Economy dennis45 Class A Motorhome Discussions 13 03-25-2014 09:42 PM
Entegra fuel economy Trose Entegra Owner's Forum 42 03-21-2014 05:16 AM
Fuel filter replacement 2005 Journey 32t Ind Journey Winnebago Industries Owner's Forum 21 02-11-2014 05:13 PM
Fuel consumption with CAT C12 2003 olyshed Country Coach Owners Forum 10 09-13-2013 10:32 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:26 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.