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.
  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 02-28-2014, 02:49 PM   #1
Junior Member
Join Date: Feb 2014
Posts: 11
Gas VS Diesel

Hi, new member. I am researching gas vs diesel, have my eye on a 37' Holiday Rambler Endeavor with a Cummins ISB Turbo Diesel Power (275 Horse Power). I have no experience with diesel, but have owned 3 different class A gas rigs.
Questions: is 275 HP enough? what MPG is normal? Its a 99 with 68k miles. Thanks, Jim.

Jim042 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 02-28-2014, 02:55 PM   #2
Community Moderator
TonyDi's Avatar

Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 12,756
Depend on how you plan to use it. If you're going to tow a heavy vehicle behind and you'll be in the mountains a lot then that engine can be a bit small. On the other hand some people are in so hurry to get there so that may not be important. Most diesels will get around 7-7.5 mpg as a rule. That too depends on how you drive it.

Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, Jeep Grand Cherokee Hemi, Blue Ox Aventa LX, and Brake Buddy. TST 507 TPMS
TonyDi is offline   Reply With Quote
Old 02-28-2014, 03:06 PM   #3
Moderator Emeritus
RickO's Avatar

Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
Hi and welcome to the forum.

This is a very common question and you can use our search feature here to find all the reading material you could possible digest.

I agree with TonyDi. I see you live in the east so probably won't be dealing with a lot of mountains unless you head our west so unless you're going to be towing a very large load the 275hp shouldn't be something to worry about.

As for gas vs diesel... as you might imagine it's a hornet's nest to discuss but IMHO, the absolute best reason to buy a diesel pusher is because you WANT one. Don't try to justify it financially because the numbers probably won't work out in favor of the DP.

If you're going to be full time and/or doing a great deal of traveling, then a DP is a really (really) nice way to go with a much quieter, smoother traveling experience. Either gas or diesel will almost always get you where you want to go... you just need to decide how much you want to spend to get there.

Best of luck.

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

2007 Itasca Ellipse 40FD
RickO is offline   Reply With Quote
Old 02-28-2014, 03:08 PM   #4
Junior Member
Join Date: Feb 2014
Posts: 11
Wow, I was told by one Diesel owner that he got 12 pulling a truck. I usually did about 8 to 8 1/2 on my 91 Dolphin (31 ' on Ford 460).
Jim042 is offline   Reply With Quote
Old 02-28-2014, 03:09 PM   #5
Junior Member
Join Date: Feb 2014
Posts: 11
Thanks for that info. Most traveling will be between Arkansas and Southern California, not pulling anything.
Jim042 is offline   Reply With Quote
Old 02-28-2014, 03:25 PM   #6
Senior Member
doc's Avatar
Appalachian Campers
Join Date: Sep 2002
Location: Dixie !! (north Georgia) USA
Posts: 3,028
Originally Posted by Jim042 View Post
Wow, I was told by one Diesel owner that he got 12 pulling a truck. I usually did about 8 to 8 1/2 on my 91 Dolphin (31 ' on Ford 460).
The veracity of that guy might be a bit questionable. The best I ever got on a 300 Cat in a 36 foot Itasca Horizon was 10 and towing a Tracker. That coach was a bit weak in the Rockies and some of steeper pulls here in the east.
doc is offline   Reply With Quote
Old 02-28-2014, 03:29 PM   #7
Junior Member
Join Date: Feb 2014
Posts: 11
Thanks for that input. I was evaluating the cost of 4k mile trips based on wrong information. Maybe I will look at the gas rigs again.
Jim042 is offline   Reply With Quote
Old 02-28-2014, 03:37 PM   #8
Senior Member
wb7auk's Avatar
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
I spend a lot of time here in the west pulling a mazda getting 10mpg and have yet
to find where I lacked power for any of these mountain passes.
Also a much nicer ride than any of the many gas units I have had.
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
wb7auk is offline   Reply With Quote
Old 02-28-2014, 04:08 PM   #9
Wingman1's Avatar
Monaco Owners Club
Join Date: Aug 2013
Location: Shasta County
Posts: 55
I had a 1998 gas 35' Rexhall Rexair with Ford 460 and Banks. Average was 7.4 pulling a Honda Accord. Last July I bought a 2003 Beaver 38' Monterey and pull the same Honda Accord. Last month going from Redding to Indio CA. I got 9.8 mpg. Having both gas and diesel, I would never go back to gas. Handling and ride comfort of the diesel is 100% better and I spent over $4K on the gasser getting it to handle good. I was told by a fellow RV'er to not buy less than a 300 hp diesel if I was going to tow. My 8.3 ISC 350 hp is just perfect. YMMV
2003 Beaver Monterey Cummins 350hp
2001 Honda Accord Toad
Wingman1 is offline   Reply With Quote
Old 02-28-2014, 04:39 PM   #10
Senior Member
89sandman's Avatar
Join Date: May 2012
Posts: 903
i tell my customers diesel means double
89sandman is offline   Reply With Quote
Old 02-28-2014, 05:05 PM   #11
Senior Member
stepside454's Avatar
Join Date: Jan 2011
Posts: 1,379
Here's what I've come to on this debate . Purchase price of a DP is obviously alot more .
After the purchase price, costs are basically a wash.
DP gets a little better MPG than gas, especially in higher elevations, & towing... But , diesel fuel costs more per gallon.
Diesel drivetrains generally require less repairs, or repairs less often than a gasser, as well as maintenance,,, but , when you do, the deisel well cost more, in some cases, alot more .
That said, the DP well ride better, have more power , more cargo & towing capacity , etc, if those are on your lust if must haves, the DP might be worth the extra costs.
stepside454 is offline   Reply With Quote
Old 02-28-2014, 05:26 PM   #12
Senior Member
GaryKD's Avatar
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 12,538
Hi Jim042,
Are you going to drive the coach more than live in it? Or are you going to live in the coach more than you will drive it? The answer will allow setting of your priorities. Torque is key with a diesel. I have a Cummins ISC 330 HP 950 ft lbs of torque. The coach and toad street weight is about 37.5K lbs. On long climbs patience and time in the truck lane is required. Other than that the Cummins will run all day and not complain. Do the math on the coach you are considering and compare to my coach.

If you will live in the coach more than you drive it, floor plan sells the coach.
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Old 02-28-2014, 06:00 PM   #13
Senior Member
Sky_Boss's Avatar

Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Posts: 6,222
Originally Posted by Jim042 View Post
Thanks for that input. I was evaluating the cost of 4k mile trips based on wrong information. Maybe I will look at the gas rigs again.
If fuel cost is the bottom line (which it isn't in my scheme of things) what does the difference in gas cost vs diesel? OK...

Current fuel prices in Alamo, TX are Gas = $3.11, DL = $3.59.

Assuming your gas and DP MH gets 7 MPG then 4000 miles will cost you $1777 in gas and while the DL costs $2051. $274 more. That seems simple enough...buy the gasser. If you get 8 MPG and 7 MPG for the DPwith the gasser then the numbers become $1555 gas vs $2051 DP for a difference of $496. Case closed. Maybe.

Nothing is that simple unless, of course, you only want to judge your choice on MPG.

Buying a MH needs to be gauged by what you will use it for. Flat lands (most of the time) vs mountains. Weekend trips vs long trips or even full time. Expected maintenance costs. Drivability in most reasonable conditions. Cargo carrying and towing capabilities. And then there is just the seat in the pants feeling. Some call that Smiles per Mile.

For ME and Sandee we went through this process looking for a full time MH and first bought a 39' Winnebago gasser with a great floor plan. We got about 7.25 MPG (including generator fuel burn) but it was not very fun to drive in cross winds and trucks passing. We didn't like the noise under the dog house and worst of all, we maxed out the rear axle before we even got it loaded for full time. We even tried some handling fixes and sound insulation in the dog house. It took us one summer of using it to decide it wasn't for US. That doesn't mean it was a bad MH and there are plenty of others that have used as a FT or serious snow bird applications. It just didn't work out for us.

Now we get about 6.25 MPG (including generator fuel burn), a monster of a chassis, tag wheel handling (what trucks!) and cargo carrying capacity beyond our needs. It is a solid home too with very good insulation as far as MHs go. And...serious Smiles per Mile!

In the end I wish it was cheaper to buy and operate but then again we got more of the things we wanted for that extra cash that you can't easily (if at all) get in a gasser. For US it isn't a contest and we are glad we made the jump.

My point is not to say what you should do but to point out some of the factors you will want to consider finding something that will work for you. It is a puzzle and it is up to you put the pieces together for our picture.

Good Luck!
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 02-28-2014, 07:15 PM   #14
Senior Member
gemini5362's Avatar
Tiffin Owners Club
Freightliner Owners Club
Join Date: Apr 2012
Posts: 2,079
Originally Posted by Jim042 View Post
Thanks for that info. Most traveling will be between Arkansas and Southern California, not pulling anything.
I live near Fort Smith, Arkansas last year I drove from home to Los Angeles. so I have probably driven a part of the route you are going to go on. I hear all of these mileage figures. I will tell you on my trip I recorded mileage when I started the trip mileage every time I stopped and recorded every gallon of diesel I put in starting with a full tank. I have a 38 foot DP with an ISL engine (400 horse) pulling a 4800 pound buick enclave. I got about 5.8 mpg on my trip. That was driving to LA then to San Fransisco then back about 5000 miles. I think the 275 is going to be a bit light if you are towing anything of any size. My 400 horse has no problems with the Ozarks or any of the mountains going to LA. But that is 400 pounds with 1200 foot pounds of torgue.

Diesel versus gas. Air Brakes, Air bag suspension, Jake Brakes I would not even want to think about the mountains in Arkansas without all of those let alone the sierra nevadas. The biggest difference is going to be cost. Diesel Pushers cost more to buy. Diesel engine maintenance costs a lot more. Diesel engine repairs costs more. Advantages to Diesel Pushers are comfort. space, driveability. You just have to figure out what is the most important to you.

gemini5362 is offline   Reply With Quote

diesel, gas

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
A High End Gas Class A or A Low End Diesel Pusher Grandcanyon Class A Motorhome Discussions 110 04-23-2014 10:22 AM
My diesel or new gas? CAT2000 Class A Motorhome Discussions 65 02-01-2014 01:42 PM
Combination Gas - Diesel engine George Schweikle iRV2.com General Discussion 3 01-10-2014 08:35 AM
Gas Versus Diesel ladyrvr66 iRV2.com General Discussion 11 10-26-2013 07:30 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:15 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.