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Open Roads Forum  >  Class A Motorhomes  >  General Topics

 > Fuel Mileage on 8.1 Workhorse

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Mike W

San Diego

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Posted: 07/22/21 02:07pm Link  |  Quote  |  Print  |  Notify Moderator

Curious and kind of related. What criteria do you all use to calculate fuel stops? Yeah, gas gauge is a pretty good indicator. But for those who don't dwell or calculate MPG a lot...?


1987 Executive Diplomat 35
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dodge guy

Bartlett IL

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Posted: 07/22/21 03:58pm Link  |  Quote  |  Print  |  Notify Moderator

Most class A gas tank are 80 gallons. So at 6 mpg you can go 120 miles to a 1/4 tank. I start looking for a station at 1/4 tank. Out west I’ll start looking at 1/2 tank because it can be pretty far between stations out there.

Realistically you can easily go 400 miles before you need to fill up. But you will have to stop before you ever need gas!


Wife Kim
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Dog Bailey

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ArchHoagland

Clovis, CA, USA

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Posted: 07/22/21 05:08pm Link  |  Quote  |  Print  |  Notify Moderator

I logged every gallon of gas I've bought over the past 95,000 miles and have averaged 7.1 mpg on my 2004 W22 36 foot coach pulling a 4,000lb toad.

Those miles almost always included going over mountains in the west.

I drive at 55 MPH to 62 MPH.

My tank holds 75 gallons and I calculate 420 miles at the most on a tank of gas although I always start looking for a gas station when I get down to a half tank or, especially when crossing a desert.


2004 Monaco La Palma 36DBD
Workhorse W22 8.1 Gas Allison 1000, 7.1 mpg

2000 LEXUS RX300 FWD 22MPG 4020 LBS
US Gear Brakes


Rick Jay

Greater Springfield area, MA

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Posted: 07/22/21 05:22pm Link  |  Quote  |  Print  |  Notify Moderator

dodge guy and ArchHoagland,

I agree with your math and refueling policies. The only thing I'd add is that the height for the pick-up tube for the generator is usually set at about the 1/4 full mark on the gas tank. So if you are using the generator, you definitely want to be looking for fuel well before the 1/4 full point on the tank. And up and down hills might even cause it to start sucking air before that point is reached. In our rig we usually travel with the generator running to keep the family comfortable, so I used to fill up around the 325-350 mile point which seemed to work well for us.

~Rick


2005 Georgie Boy Cruise Master 3625 DS on a Workhorse W-22
Rick, Gail, 1 girl (24-Angel since 2008), 1 girl (20), 2 boys (21 & 18).
2001 Honda Odyssey, Demco Aluminator tow bar & tow plate, SMI Silent Partner brake controller.


dodge guy

Bartlett IL

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Posted: 07/22/21 06:42pm Link  |  Quote  |  Print  |  Notify Moderator

Rick Jay wrote:

dodge guy and ArchHoagland,

I agree with your math and refueling policies. The only thing I'd add is that the height for the pick-up tube for the generator is usually set at about the 1/4 full mark on the gas tank. So if you are using the generator, you definitely want to be looking for fuel well before the 1/4 full point on the tank. And up and down hills might even cause it to start sucking air before that point is reached. In our rig we usually travel with the generator running to keep the family comfortable, so I used to fill up around the 325-350 mile point which seemed to work well for us.

~Rick


Yes, I forgot to add that. Although I have ran the tank down to 1/8 and the generator still ran. But I was coming into Denver and filled right off I70 before I got into the mountains.
So yes, you have to know where the cutoff is for the generator fuel pickup.

fyrflie

Martinez, CA. USA

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Posted: 07/23/21 09:45am Link  |  Quote  |  Print  |  Notify Moderator

I have a 60 gallon tank and use 6 mpg as my baseline mileage.
Looking for fuel and beer around 300 miles.

egh33

Texas

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Posted: 07/24/21 02:37pm Link  |  Quote  |  Print  |  Notify Moderator

burgess001 wrote:

I drove DP's for years. Thinking about a 30 ft Workhorse. What kind of gas mileage can I expect


All depends on the tail wind, down hill is great gas mileage





burgess001

Springfield, MO USA

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Posted: 07/31/21 11:14am Link  |  Quote  |  Print  |  Notify Moderator

Thanks everyone. We did go with a V10 Class C. The Workhorses we found were pretty much used up.


Jerry and Katie
More than 20 great years motorhoming and still loving it...
2004 DSDP 3810 (more than I needed...less than I wanted)
2004 Trailblazer (too heavy but well worth dragging)

oliviaolivv0101

USA

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Posted: 08/04/21 06:20am Link  |  Quote  |  Print  |  Notify Moderator

Single digits

wa8yxm

Davison Michigan (East of Flint)

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Posted: 08/04/21 05:38pm Link  |  Quote  |  Print  |  Notify Moderator

I drove a 2005 Damon Intruder 377W (Workhorse 8.1L) for 15 years
Millage. Lowest I ever got was 6 (Major headwind)
Highest 13.8 (I kid you not the tumble weeds were going down the road passing me at nearly 100 MPH Straight down the very straight (I-10) road.. Was ... Fun (not) when I exited for the night)

Normal depended on my towed. 7-8 towing a 2001 Dodge neon using a transmission lube pump (2500 pound towed)
8-9 towing a 1992 Chevy Lumina APV (4000 pounds) with a Axle lock. I do not knwo if this was because the larger APV "Spoiled" the air flow or the added drag of the automatic transmission on the Neon.
Bobtail (no towed car) about the same as with the Lumina (Argument for spoiled air flow)

Fresh Wax Job 10-11MPG
Anyone care to guess why I waxed spring and fall before my semi-annual migration hike?


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


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