Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > Trailer Towing and Tow Vehicles Discussion
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 12-01-2014, 12:38 PM   #15
Senior Member
 
schrederman's Avatar
 
Jayco Owners Club
Join Date: Mar 2012
Location: Weatherford, TX
Posts: 941
While air drag goes up exponentially with speed, all other forms of friction do the same thing.... like rolling resistance of tires, drive-train friction, etc. I'm not the speed police, nor am I a tree hugger... but I'll hang back at 62 - 65 mph and get there just fine. Tire speed ratings probably have some lawyer cushion built in to that 65 mph speed limit.... and maybe more than we might think, but I'm still happy with that speed for going long distances. I'll be heading to the Phoenix area sometime soon, and it's a bit longer trip towing at 62 - 65 than just hittin' the road at 75 -80... but then, I've hurried enough in my 63 years... and I'm done with that.
__________________

__________________
Jack and Dee Dee Weatherford, Texas
2014 Ram 2500 Crew Cab 4X4 w/CTD 6.7
2016 Jayco White Hawk 28DSBH Travel Trailer
schrederman 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 12-01-2014, 12:53 PM   #16
Senior Member
 
spsm's Avatar
 
Join Date: Oct 2013
Posts: 604
I run 58 - 62, my sweet spot is 1400 rpm's and 62 mph. With a 400 ISL, I'll only get 7.5 at the most. But if I stretch the truth, I generally get 12 mpg.
__________________

__________________
spsm is offline   Reply With Quote
Old 12-01-2014, 01:16 PM   #17
Senior Member
 
Join Date: Sep 2012
Posts: 5,939
FWIW Contemplating what one's time is worth when retired is sort of moot. One gets paid anyway. OTOH it is often more interesting to do 55 on the slow roads enjoying the things one sees rather than sweating the morons on the superslabs doing 70-75 just to get somewhere. For me it's the journey not the destination. ;-)
__________________
nothermark is offline   Reply With Quote
Old 12-02-2014, 04:17 PM   #18
Senior Member
 
2500HD's Avatar
 
Join Date: Sep 2013
Location: DEL-MAR-VA
Posts: 362
[QUOTE=TDI-Minnie;2330587]Well, I guess it all depends on what your time is worth.
Some people bill $100+ per hour for their time. Saving 2-3 miles per gallon will never make you whole.
Even if your time is only worth $15/hr, you can easily afford the extra gallon of fuel if you save 30+ minutes.
Just another view from an economics angle.

Also, what can you do with the time saved? Sleep in, or arrive at camp before dark or rain? Play with the kids... That's worth something too.

Saving 2 or 3 mpg really isn't ever much of a consideration for me. I do like to get the best fuel economy I can... up to a point.

That's my thought on MPG although Im not the guy who tows at 75-80mph either. Most of us have spent $20,40,60k on a truck and another $20-60K+on trailers or a motorhome. What difference does it make if you get 10.5 at 70 and 9 at 75? I have never calculated my mpg and don't plan to. I'm not a rich man and have older equipment than most on here and we are gonna go camping whether the truck or MH gets 5mpg or 15mpg. If gas/diesel gets to 6 or $7 a gallon we just won't go too far.

I normally tow between 60-63 and will hit 70-75 on a good open stretch
__________________
2016 Jayflight 32 BHDS Fiberglass sides. 16" wheels and LT TIRES
2017 Ford F-250 CCLB 6.2 with 4.30 gears
Traded06' Chevy CC Dually 6.0.
2500HD is offline   Reply With Quote
Old 12-06-2014, 02:41 PM   #19
Registered User
 
Join Date: Aug 2014
Posts: 1,346
I tow at 60-62 29K combined wt 2011 RAM Dually with 36' Mobile Suites. NW WA to SoCal and back hand calc average of all tanks 9.0mpg with a low of 8.4 and a high of 10.4.

Looking forward to see how my recently ordered 15 RAM Dually compares.
__________________
Cummins12V98 is offline   Reply With Quote
Old 12-06-2014, 02:50 PM   #20
Senior Member
 
TDI-Minnie's Avatar
 
Join Date: Sep 2013
Posts: 1,733
Quote:
Originally Posted by Cummins12V98 View Post
I tow at 60-62 29K combined wt 2011 RAM Dually with 36' Mobile Suites. NW WA to SoCal and back hand calc average of all tanks 9.0mpg with a low of 8.4 and a high of 10.4.

Looking forward to see how my recently ordered 15 RAM Dually compares.
That Asin and refined aerodynamics should help. Also having DEF vs DPF should make a difference too. I know my 2012 HO picked up 4mpg average with deletes. Amazing how inefficient the EGR and DPF are.

Can't wait to see your results.
__________________
2013 Winnebago 2301BH-Red
2012 Ram 2500 Megacab HO CTD
TDI-Minnie is offline   Reply With Quote
Old 12-06-2014, 06:18 PM   #21
Registered User
 
Join Date: Aug 2014
Posts: 1,346
Quote:
Originally Posted by TDI-Minnie View Post
That Asin and refined aerodynamics should help. Also having DEF vs DPF should make a difference too. I know my 2012 HO picked up 4mpg average with deletes. Amazing how inefficient the EGR and DPF are.

Can't wait to see your results.
The front axle disconnect is suppose to make 1mpg difference and with DEF should help. If I average 9.5 to 10 towing I will be happy.
__________________

__________________
Cummins12V98 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
80 MPH speed limits, in many states, yeah sure. FIRE UP MH-General Discussions & Problems 46 01-07-2015 02:33 PM
2004 ISL CAPS - MPG Trip Info Sharing Smitty77 Cummins Engines 0 08-23-2014 11:14 AM
Interesting MPG Observations Running House Generator Sky_Boss Class A Motorhome Discussions 15 07-04-2014 04:41 PM
Cummins ISX Achieves 10.7 MPG in Latest Test DriVer RV Industry Press 0 02-18-2014 12:44 PM
Slight Improvement in C7 mpg mbrandt1402 Caterpillar Engine Forum 2 01-26-2014 11:30 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:48 AM.


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