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 > Fuel mileage Diesel Pusher

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lake

Arkansas

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Joined: 12/28/2003

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Posted: 12/06/07 07:55am Link  |  Print  |  Notify Moderator

I don't really understand how these folks who claim to get 9 to 10 MPG on their diesel pushers do it. I have a Winnebago Journey with a 330 Cat, 17,000 miles and the best I can do is 7.5 MPG and sometimes 8 if I have a tail wind. I pull a Honda Accord but it doesn't seem to make much difference pulling a toad or not. Does anyone know if there is some modification such as a special computer chip or anything that will help my fuel mileage? I usually drive around 60 MPH.




SpoiledRotten

Central Mississippi

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Posted: 12/06/07 08:01am Link  |  Print  |  Notify Moderator

I'm surprised to hear that about a DP. My parents have a gasser and it gets better than you are getting with the motor in back. I would have thought they would turn 12 - 14 compared to the gassers. I would like to hear the actual claims too.


Just the 3 of us...SpoiledRotten, TotallyRotten, and ALittleRotten
2000 F-250 Lariat, CC
7.3 PSTD-Superchipped
2005 33RL2 New Vision - AKA "SpoiledRotten"
2000 Jeep Wrangler Sahara Edition


wolfe10

Texas

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Posted: 12/06/07 08:02am Link  |  Print  |  Notify Moderator

Start by reading this document to determine what factors affect MPG and performance:

https://ohe.cat.com/cda/files/287140/7/LEGT5364.pdf

As you will see in the "Understanding Coach (RV) Performance document, speed kills MPG.

Also, use economy mode as much as possible (there is another current discussion on MODE here on Class A today).


Brett Wolfe
1997 Safari Sahara 3540
EX: 1993 Foretravel 36' U-240


FMCA Forum: www.community.fmca.com/index

Diesel RV Club:http://www.dieselrvclub.org/

texasbaskets

Frisco, TX

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Posted: 12/06/07 08:16am Link  |  Print  |  Notify Moderator

2005 Cummins 5.9B 2500MH 5 speed tranny, GVWR 26,870.

With 16,000 miles, the computer says 8.7 MPG on all fuel consumed by the engine since it's "Born On" date.. The last 10,000 was usually pulling a toad and some biodiesel thrown in there as well.

Cheers..


Michael, Kay, and Prissy (The vicious 6 pound Malti-Poo)
'05 Coachmen SportsCoach SE 372DS a.k.a. "Mana's Cabana"

SunflyerA

1

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Posted: 12/06/07 08:05am Link  |  Print  |  Notify Moderator

lake wrote:

I don't really understand how these folks who claim to get 9 to 10 MPG on their diesel pushers do it. I have a Winnebago Journey with a 330 Cat, 17,000 miles and the best I can do is 7.5 MPG and sometimes 8 if I have a tail wind. I pull a Honda Accord but it doesn't seem to make much difference pulling a toad or not. Does anyone know if there is some modification such as a special computer chip or anything that will help my fuel mileage? I usually drive around 60 MPH.


Then again I wish I got 7.5mpg...6.5 for me....did get 8 once with a tail wind, traveling at 55mph. Mine is a 350 cat.....I believe smaller, older engines do get better mileage.





jauguston

Bellingham, WA

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Posted: 12/06/07 08:08am Link  |  Print  |  Notify Moderator

This is the internet, anyone can claim anything and they are not required to prove anything. Those claims are just that.

My class A is 31' and weights 17,000 pounds. I have a 275 hp ISB Cummins engine. I get 9.5 to 10 mpg never driving over 60 mph. That engine in a Dodge 3/4 ton PU will get 17-18 mpg.

Jim


2005 Coachman Sportscoach Elite 402 40'
350hp Cat C-7 w/MP-8
7500w Onan quiet diesel generator
6-Kyocera 130w solar panels SB3024i MPPT controller
Pressure Pro TPMS
1987 Suzuki Samurai tintop Toad w/VW 1.6 turbo diesel power


Ames

South Central Florida

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Posted: 12/06/07 08:31am Link  |  Print  |  Notify Moderator

We had a '91 35 ft Beaver Baronet that had a bit of an shaped front and we grossed around 23,000 and got 10mpg at 62 mph with a 3116 CAT. Our present square front Patriot with a 3126B grosses closer to 33,000 gets around 7.5 at 64 to 67 miles per hour. This is logging every fuel fill up and mileages for over 65,000 with the Baronet and now at 99,000 plus on the Patriot with the Silverleaf data system.

In talking to Beaver Ambassador Club members with the C9 engine and owners who have had the C12 and C13 the newer emission engines are having lower fuel economy results.
This could be caused by ULSD opposed to LSD as some people have stated that the ULSD has a lower centane rating.

Wolfe 10 article is good reading in reference to fuel consumption.


Richard and Babs and a Bob Tail Cat
97 Beaver Patriot 40 Kitchen Slide
330 HP Member FMCA, BAC, Good Sam, CAT RV Club
Toad 2012 Dodge Durango RT AWD Hemi

CA Traveler

The Western States

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Posted: 12/06/07 08:20am Link  |  Print  |  Notify Moderator

8.3 MPG averaged over 15K miles. 29.6K+3.4K toad=33K total. Drive 60-63.

I'd believe 9+ on some of the smaller engines depending upon how it's driven and the weight of the coach.

wolfe10 get the best believable mileage of anyone I know. But as I recall the rig is about 23K, more aerodynamically than most, 275 non stock and well tuned CAT and he drives for economy. I believe he said 10+. Hope I got the facts right.


2009 Holiday Rambler 42 Scepter with ISL 400 Cummins
2004 Honda CR-V

Bob


jess33

Lawton, Oklahoma

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Posted: 12/06/07 08:31am Link  |  Print  |  Notify Moderator

have a 40 foot w/400 cummins. Drive at 58 miles per hour ( this is the speed it shifts into 6th ) I get between 6.3 and 7 mpg. Have never gotten over 7

loedman1

Napa, Ca.

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Posted: 12/06/07 08:22am Link  |  Print  |  Notify Moderator

These mileage threads have always been a curiosity to me, you drop between 100 and 500k on a motorhome and then worry about the mileage?
I have yet to check mine and most likely never will

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