Good Sam Club Open Roads Forum: Class C Motorhomes: Motorhome Fuel Economy
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Grit dog

Black Diamond, WA

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Posted: 12/03/21 02:01pm Link  |  Quote  |  Print  |  Notify Moderator

Several reasons for this appearance of better than great fuel economy….assuming the math and conversions are correct.
1. Short trips, partial fill ups especially on the top 1/2 or 1/4 tank are notoriously inaccurate.
IE a couple litre difference on 30l fill up will change the numbers 4x as greater than a couple liters difference between fill ups on a whole tank.
2. You don’t know the wind conditions, you may know the road, but wind plays a huge part. And sometimes it blows the other direction from prevailing winds even when you’re living on the bottom of the earth and not the top…
3. Most men lie about 3 things. Size of fish they caught, size of their 3rd member and the fuel mileage of their truck.
4. Based on your decided bias for the down under and your years of repeated America bashing on here, I don’t believe you any more than the owner who supposedly posted their mileage.


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RobertRyan

Australia

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Posted: 12/03/21 02:18pm Link  |  Quote  |  Print  |  Notify Moderator

wolfe10 wrote:

bgum wrote:

Even at 25 that is terrific.


I agree-- terrific economy.

11 KM/liter= 25.87 MPG. Note, this is to the U.S. gallon.


To the Imperial gallon it works out to a little over 30 MPG.

Yes pretty amazing, if you read the other posts on the FB page, seems quite a few getting very good economies with their diesels for such large vehicles

RobertRyan

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Posted: 12/03/21 02:22pm Link  |  Quote  |  Print  |  Notify Moderator

mleekamp wrote:

Ah, if only I could get double digits in my C....10 would be great. But I live between 7 and 8 depending on if i'm pulling a dinghy or not, and speed, and wind, and....

I've never gotten above 8.3. 33 foot C. Loaded.

I expected more like yours, anyway nice to see 25.8US mpg for a nearly 26ft,11,000lb GVWR Motorhome
This is also pretty stunning 16.8USMpg towing a Suzuki Jimmy
Quote:

We average 14/100(16.8 US mpg) 2020 iveco avida Esperance upgraded weight 5200 towing a Suzuki Jimny


* This post was edited 12/03/21 04:59pm by RobertRyan *

valhalla360

No paticular place.

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Posted: 12/04/21 01:02am Link  |  Quote  |  Print  |  Notify Moderator

PartyOf Five wrote:

My minivan gets 18mpg with nothing in it, I'm ok with 7mpg carrying a week's worth of everything I might need.

At the end of the day, I'm still paying less for annual fuel costs than most of the world.


The 1/2 ton pickups with small diesel are pushing upwards of 30mpg, so not surprising at moderate speeds a small MH getting 25mpg.


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RobertRyan

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Posted: 12/04/21 02:33am Link  |  Quote  |  Print  |  Notify Moderator

Quote:

The 1/2 ton pickups with small diesel are pushing upwards of 30mpg, so not surprising at moderate speeds a small MH getting 25mpg

Well certainly would be pretty not surprising, they do not have GVWR's of 11,000lb, more in the 7000lb range, and are not towing a small SUV dinghy like a Motorhome. A 11,000lb GVWR is more 3/4 to 1 ton Pickup Truck
" moderate speeds" 70mph or 110kph?????
Quote:

A half-ton or 150/1500 model typically falls under an 8,500-pound GVWR. A three-quarter-ton or 250/2500 model ranges between 8,500 and 9,990 pounds. A one-ton or 350/3500 truck is likely to be 9,900


rjstractor

Maple Valley, WA

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Posted: 12/04/21 08:30am Link  |  Quote  |  Print  |  Notify Moderator

RobertRyan wrote:

mleekamp wrote:

Ah, if only I could get double digits in my C....10 would be great. But I live between 7 and 8 depending on if i'm pulling a dinghy or not, and speed, and wind, and....

I've never gotten above 8.3. 33 foot C. Loaded.

I expected more like yours, anyway nice to see 25.8US mpg for a nearly 26ft,11,000lb GVWR Motorhome
This is also pretty stunning 16.8USMpg towing a Suzuki Jimmy
Quote:

We average 14/100(16.8 US mpg) 2020 iveco avida Esperance upgraded weight 5200 towing a Suzuki Jimny


I think the 16.8 mpg towing a Suzuki Jimny is much more realistic. A small, light towed vehicle should hardly affect fuel mileage. When I had an E450 based class C, of course it got much worse mileage, but towing a 3200 pound vehicle cost me less than 1 mpg. As far as getting almost 26 mpg in an 11000 lb motorhome? I think they adopted in Australia the time-tested American method of increase fuel economy- make up numbers to impress the internet! [emoticon]

bobndot

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Posted: 12/04/21 09:38am Link  |  Quote  |  Print  |  Notify Moderator

I chat with a lot of diesel owners at a friends truck repair shop and they are not happy. Medium duty diesel drivers that i talk to these days are fed up with new diesel regulations . They complain about losing business bc of repair down time.

The owners driving routes like Snap- On , bread and soda routes are switching back to gas trucks.
It must be pretty bad to unload $100,000 plus trucks prematurely.
If someone ‘claims’ mpg figures by using simple math counting used gallons and miles driven ,
the results are of doubtful validity.

pnichols

The Other California

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Posted: 12/04/21 09:50am Link  |  Quote  |  Print  |  Notify Moderator

rjstractor wrote:


I think the 16.8 mpg towing a Suzuki Jimny is much more realistic. A small, light towed vehicle should hardly affect fuel mileage. When I had an E450 based class C, of course it got much worse mileage, but towing a 3200 pound vehicle cost me less than 1 mpg. As far as getting almost 26 mpg in an 11000 lb motorhome? I think they adopted in Australia the time-tested American method of increase fuel economy- make up numbers to impress the internet!

I hesitate using the word "impossible" with respect to the 26 mpg claim ... but maybe that word fits here?


Phil, 2005 E450 Itasca Spirit 24V

RobertRyan

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Posted: 12/04/21 11:43am Link  |  Quote  |  Print  |  Notify Moderator

rjstractor wrote:

RobertRyan wrote:

mleekamp wrote:

Ah, if only I could get double digits in my C....10 would be great. But I live between 7 and 8 depending on if i'm pulling a dinghy or not, and speed, and wind, and....

I've never gotten above 8.3. 33 foot C. Loaded.

I expected more like yours, anyway nice to see 25.8US mpg for a nearly 26ft,11,000lb GVWR Motorhome
This is also pretty stunning 16.8USMpg towing a Suzuki Jimmy
Quote:

We average 14/100(16.8 US mpg) 2020 iveco avida Esperance upgraded weight 5200 towing a Suzuki Jimny


I think the 16.8 mpg towing a Suzuki Jimny is much more realistic. A small, light towed vehicle should hardly affect fuel mileage. When I had an E450 based class C, of course it got much worse mileage, but towing a 3200 pound vehicle cost me less than 1 mpg. As far as getting almost 26 mpg in an 11000 lb motorhome? I think they adopted in Australia the time-tested American method of increase fuel economy- make up numbers to impress the internet! [emoticon]

No several others have similar fuel economies, so overall not that unusual. Remember their Diesel not Gas Motorhomes., the diesels get vastly better fuel economies and much greater reliability than in the US, under non NA regulations, bit like comparing Oranges to Apples.See the other posts on the FB website, similar fuel economies. None in their right mind here would run a gas powered motorhome, possibly a LPG conversion but not a Petrol one.

* This post was last edited 12/04/21 12:09pm by RobertRyan *   View edit history

RobertRyan

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Posted: 12/04/21 11:46am Link  |  Quote  |  Print  |  Notify Moderator

bobndot wrote:

I chat with a lot of diesel owners at a friends truck repair shop and they are not happy. Medium duty diesel drivers that i talk to these days are fed up with new diesel regulations . They complain about losing business bc of repair down time.

The owners driving routes like Snap- On , bread and soda routes are switching back to gas trucks.
It must be pretty bad to unload $100,000 plus trucks prematurely.
If someone ‘claims’ mpg figures by using simple math counting used gallons and miles driven ,
the results are of doubtful validity.

Different diesel regulations apply outside NA, so fuel economy is considerably better, in this case amazingly better. Diesel regulations in the US are chocking the life out of Diesels in the US, poorer reliability and not very good fuel economy
As I said in my post above none would even consider running a Gas Motorhome,or Gas Commercial Vehicle, their all diesels. Irony is you cannot run a US compliant diesel in a Euro 5 or higher regulation country. So you get the worst of both worlds, Diesels regs in the US are choking diesel commercial operations in the US

* This post was last edited 12/04/21 12:16pm by RobertRyan *   View edit history

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