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 08-29-2013, 08:34 PM   #169
Senior Member
 
Fleetwood Owners Club
Freightliner Owners Club
Join Date: Nov 2009
Location: FORT WORTH, TEXAS
Posts: 1,533
My house gets better milage than your house. LOL
Bill
__________________

__________________
2003 Bounder 38N
5.9 Cummins 3000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
WILDEBILL308 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 08-30-2013, 07:36 PM   #170
Senior Member
 
Maladjusted's Avatar
 
Join Date: May 2013
Posts: 292
Hit the fuel stop again today.. 686 miles, 73.2 gallons with 7 hrs of generator use while traveling.... So I figured 5 gallons for the gen? So 68 gallons used for 686 miles. 10 mpg. Not bad for towing my wifes 5600 lb Tahoe.
__________________

__________________
-------------------------
2013 Coachmen SportsCoach 385DS
2010 HD CVO StreetGlide
Maladjusted is offline   Reply With Quote
Old 08-30-2013, 07:46 PM   #171
Moderator Emeritus
 
RickO's Avatar


 
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
Quote:
Originally Posted by Maladjusted View Post
Hit the fuel stop again today.. 686 miles, 73.2 gallons with 7 hrs of generator use while traveling.... So I figured 5 gallons for the gen? So 68 gallons used for 686 miles. 10 mpg. Not bad for towing my wifes 5600 lb Tahoe.
Very impressive!

Color me jealous.

Rick
__________________
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

2007 Itasca Ellipse 40FD
RickO is offline   Reply With Quote
Old 08-30-2013, 07:53 PM   #172
Senior Member
 
Maladjusted's Avatar
 
Join Date: May 2013
Posts: 292
She's no barn burner... But I can maintain highway speeds on the minor hills here on the east coast.
__________________
-------------------------
2013 Coachmen SportsCoach 385DS
2010 HD CVO StreetGlide
Maladjusted is offline   Reply With Quote
Old 08-31-2013, 08:31 AM   #173
Senior Member
 
Alan JS's Avatar
 
Join Date: Jul 2012
Location: S Florida
Posts: 117
Quote:
Originally Posted by Stanmawyer View Post
Trip from Dallas, TX to Ocean City, MD

American Heritage 45 ft. C15 Cat Acert engine. 600 hp, 1950 ft/lbs torque
12.5 KW Generator running constantly, powering 3 roof air conditioners, fridge, etc.
Towing 4900 lb Jeep Commander Limited
Average speed 68 mph
Crossed 3 mountain ranges ( went up and down on cruise control)
Mostly highway driving

5.6 mpg.

I'd love for it to be better, but I do love the hill-flattening torque of my big Cat!
Wow you better hope you pass an awful lot of diesel stations along the way or else your diesel pusher is going to become a diesel "pushed"
Even with a solid chassis I find that 68-70 mph tends to get me in trouble. I don't like passing other trucks and it only takes a split second on inattention at 68 mph to end up in another lane.
Our mpg and wind resistance suffer in the higher 60's.

I also leave it on cruise control to rest my leg and improve mileage.we keep our pets close to the cabin so usually the dash AC is sufficient. I heard from our mobile tech that running the AC 's on generator was better mileage than through the dashboard.
Is that true? I always thought that since the engine was already on the AC didn't subtract much fuel/mileage.
Which is it?
__________________
My Wife said absolutely the LAST MH I will ever buy!
Entegra Aspire DLQ 2014
Alan JS is offline   Reply With Quote
Old 08-31-2013, 10:22 PM   #174
Junior Member
 
Join Date: Jun 2011
Posts: 9
I have a 2011 Holiday Rambler Neptune with a 360 ecummins. On a trip from Albany NY to Litchfield ME using I90/I494?I95 (338 miles) I used 30 gals. of fuel. 11 MPG. I weigh in at about 35000 lbs. Tha's about the only good thing about this unit. Electrical probs galore. but mileage is GREAT.
__________________
condor918 is offline   Reply With Quote
Old 09-01-2013, 08:12 AM   #175
Senior Member
 
Piker's Avatar
 
Join Date: May 2011
Posts: 1,299
Quote:
Originally Posted by Alan JS View Post
Even with a solid chassis I find that 68-70 mph tends to get me in trouble. I don't like passing other trucks and it only takes a split second on inattention at 68 mph to end up in another lane.
If that's true, then you must have mechanical or tire issues? Our old rig tracks straight down the road at 75mph with no problems. Just feels like your driving a truck or car... with a few extra rattles from the inside. We had some radial pull at one point, but a tire rotation solved that problem quickly.

Quote:
Originally Posted by Alan JS View Post
I heard from our mobile tech that running the AC 's on generator was better mileage than through the dashboard.
Is that true? I always thought that since the engine was already on the AC didn't subtract much fuel/mileage.
Which is it?
I have heard that too... I can't find any solid test data on the net that says exactly how many hp an auto compressor will use, but I've been reading reasonable guestimates that they use around 5-10hp. That might not seem like a lot, but I guess it would depend on how many hp it takes to push your rig down the road at any given mph. Your engine might be 300hp, but say at 60mph it only has to produce 100hp to get you down the road... if you add a 5 or 10hp draw to the engine, that would be a 5 or 10% increase in fuel usage... I think... really I'm just guessing.

It's hard for me to believe that a compressor run right off the engine would be less efficient than a compressor that is run "indirectly" off the generator's engine through a generator head... but who knows? Most of the evidence we read about on the net is anecdotal... doesn't mean it's not true though.

Our dash air hasn't worked since we got the RV... so I have no first hand comparison. I do know that running our 7.5kw diesel generator to run our 2 rooftop units drops our mileage about .5 mpg or so when traveling on the interstate.

Since I doubt that the dash air in our rig would even remotely be able to keep up by itself, I have been tempted to try and retrofit an electric motor and compressor to run the dash air off of the generator along with the rooftop units... might not be worth it now that I've put direct air dumps in the rooftop units. They seem to work pretty good on their own now.

-cheers
__________________
1994 Holiday Rambler Endeavor LE - Engine Rebuilt and Restoration in Process
Piker is offline   Reply With Quote
Old 09-01-2013, 09:38 AM   #176
Senior Member
 
dajudge's Avatar
 
Tiffin Owners Club
Freightliner Owners Club
Join Date: May 2009
Location: SOUTH LOUISIANA(GOD'S COUNTRY)
Posts: 645
If you get 10 or more mpg, you must be travelling downhill all the way, possiby with the engine not running.
__________________
07 PHAETON, FREIGHTLINER, CAT, FOUR SLIDES, JEEP WRANGLER TOAD
dajudge is offline   Reply With Quote
Old 09-01-2013, 12:57 PM   #177
Senior Member
 
Piker's Avatar
 
Join Date: May 2011
Posts: 1,299
Quote:
Originally Posted by dajudge View Post
If you get 10 or more mpg, you must be travelling downhill all the way, possiby with the engine not running.
We get a solid 10.5-11mpg... hand calculated over a 6200 mile trip out west and back. It was not downhill both ways. We ran our engine...

If you're getting less than 10 mpg, then your RV is probably heavier than 10 tons gvw and/or possibly burns gas instead of diesel. Mileage depends on many factors, but for someone to make a blanket statement that no one can get more than 10mpg is simply evidence that they are uninformed about every combination of body-style, chassis configuration, and drivetrain combination that exists. No big deal... who ever could be that informed? ...so what's wrong with taking people at their word sometimes, even if it makes you feel uncomfortable that you don't get as good a fuel economy as you would like?

Granted, some people do make mistakes when calculating their mileage...

It's all good... those who have the $$ to be carefree about fuel costs should let those of us who make fuel costs a consideration feel free to worry about our mpg without judging whether we should or shouldn't worry... and of course those of us who are trying to eek every last mpg out of our rigs should likewise let the ones who don't care just enjoy their blessings in life. I'd love to not have to consider the price of fuel... but it's just not where I'm at right now. I'm still having fun though... and the family too.

-cheers
__________________
1994 Holiday Rambler Endeavor LE - Engine Rebuilt and Restoration in Process
Piker is offline   Reply With Quote
Old 09-01-2013, 01:08 PM   #178
Senior Member
 
Monaco Owners Club
Holiday Rambler Owners Club
Join Date: Jan 2013
Location: michigan-tip of the mitt
Posts: 1,382
Quote:
Originally Posted by dajudge View Post
If you get 10 or more mpg, you must be travelling downhill all the way, possiby with the engine not running.
I got 10 mpg once. Then I found my math error. Oh dumb me!
__________________
HR 29 fks TT, 1 slide, Chevy Silverado
Next stop?
t55watson is offline   Reply With Quote
Old 09-01-2013, 03:46 PM   #179
Senior Member
 
Chaffeekid's Avatar
 
Join Date: Dec 2011
Location: Chaffee, MO.
Posts: 397
Most recent trip from Southeast Missouri to the Kankakee Illinois area and back, 11.287MPG. Miles driven/gallons used, towing my full size dodge ram.
Engine 5.9 Cummins/Allison transmission, 4 speed with overdrive.
Never over 60MPH, power/economy switch in economy position.
Jim
__________________
MGySgt USMC(R) 1961-1991
2001 Fleetwood Expedition
2013 Jeep Wrangler Sierra Toad
Chaffeekid is offline   Reply With Quote
Old 09-01-2013, 07:11 PM   #180
Senior Member
 
Maladjusted's Avatar
 
Join Date: May 2013
Posts: 292
Quote:
Originally Posted by dajudge View Post
If you get 10 or more mpg, you must be travelling downhill all the way, possiby with the engine not running.
Huh... Interesting comment.

686 miles, 73.2 gallons with 7 hrs of generator use while traveling.... Full fill, ran to Atlantic City and back to Richmond, Va full fill again.

So I figured 5 gallons for the gen? So 68 gallons used for 686 miles. 10 mpg.

Would you like me to video the trip and show you the receipts the next time I travel?

Oh and btw... My rig is 28k lbs with out the toad. That mileage is towing a 5600 lb Chevy Tahoe.

I guess some people can't handle the fact that the 6.7 ISB is a fuel efficient engine for a <30k lb rig.
__________________
-------------------------
2013 Coachmen SportsCoach 385DS
2010 HD CVO StreetGlide
Maladjusted is offline   Reply With Quote
Old 09-01-2013, 07:45 PM   #181
RVM #74
 
PushedAround's Avatar


 
Tiffin Owners Club
Join Date: Sep 2012
Location: Ambler, PA
Posts: 2,853
Blog Entries: 7
We just drove from Philly to Cspe May, NJ. Gauging solely off of the computer we got 11 mpg driving the hills through South Eastern PA, and the when we got to the flatlands of NJ, we encountered a strong headwind which dropped our average down to 9.9. Based on that, you can see where a small difference in speed resulting in less headwind can produce a significant difference in mileage.
__________________
Larry & Cheryl Oscar, Louie, Ranger & Henry (our Springers)
PushedAround is offline   Reply With Quote
Old 09-01-2013, 08:11 PM   #182
Senior Member
 
CampDaven's Avatar


 
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 14,459
Blog Entries: 1
Quote:
Originally Posted by Piker View Post

We get a solid 10.5-11mpg... hand calculated over a 6200 mile trip out west and back. It was not downhill both ways. We ran our engine...

If you're getting less than 10 mpg, then your RV is probably heavier than 10 tons gvw and/or possibly burns gas instead of diesel.

-cheers
Interesting!

I would be interested in details of your rig. It is not in your profile.

I burn diesel and get 10.5 to 12.3 at 23,500 lbs, MH plus toad. I dont check long term mileage.
__________________

__________________
Dave and Nola, RVM1
The Journey is Our Destination!

http://davenola.blogspot.com/
CampDaven 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


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:38 AM.


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