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Old 05-14-2023, 09:01 PM   #21
Senior Member
The Gritz Carlton's Avatar
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Florida
Posts: 5,850
THOR #11130
We're 3,700 miles into our Western Swing. Camping at Kaibab Paiuto reservation on our way to Zion tomorrow. Diesel has been very available and were getting 16.2 average MPG including the hills. My twin 5 gallon jugs have been "sleeping on the rack" full of fuel since we left the beach. I would still do the same thing as I'm a over prepared person. IMHO, the upgrade for over $1,200 isn't necessary. I always fuel up at the last, closet fuel stop before I have plenty of fuel in case I need to live off generator for a while and the chassis tank easily gets me to the next night...running 275-300 miles per day.

Now an SOB
Traded Thor for Melbourne Prestige 24NP
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
Blondie passed in 2020 at 5 to Leukemia
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Old 05-14-2023, 09:29 PM   #22
Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
Originally Posted by ducksface View Post
Not exactly related:
Ths 52 gallon size storage addition on my 24.1 sits between the frame rails where a spare usually goes on a truck.
I access it through a hole cut in the rear bins floor.

Easy, fully welded.
My spare sits in the area you describe. Hangs from the underside.

That said, I agree with you on analysis of adding extra tank.
And our 24.1’s hold 55 gals. We consistently get 10-11mpg.
That’s over 500 miles. I can’t sit that long without cramping up.

The only thing to remember on these rigs is that you need a minimum 1/4 tank or more to run the genny.
'17 Vegas 24.1
Fallbrook, CA
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Old 05-15-2023, 02:30 AM   #23
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gnach's Avatar
Brand: Thor Motor Coach
Model: Axis 25.4
State: California
Posts: 784
THOR #6582
Originally Posted by taylorbob1 View Post
My spare sits in the area you describe. Hangs from the underside...
On the Axis the spare underneath would be swell but I have a rear mounted carrier and not planning on passing thru PA (other thread). But I do keeping looking at that space for an auxiliary poop tank for dry camping. But that would require a macerator, manual transfer, and precious fresh water to clean it up. Oh well.
I'm wearing trifocals now but my hindsight is 20/20.
Bilsteins and Sumos front and rear...HUGE! FatMat and Hoodliner...HUGE!
Hellwig sway bars F&R, 235/85 Hankook ATM, alignment...HUGE!!!
Battery watering, 260watts Solar and BigFeets to make life easier.
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Old 05-15-2023, 02:40 AM   #24
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ducksface's Avatar
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,921
THOR #13932
I tested my 24.1 for the quarter tank theory.
It was VERY UNCOMFORTABLE but I tried to run the 24.1 out of gas, just for the experience/memory/sequence knowledge.
I got down to about one gallon left before I chickened out. I put 53.5 gallons in the tank after my low fuel light came on and I went 65 miles further at maybe 10mpg/75mph.

The generator never turned off. It ran with almost no fuel in the tank. Possibly, if the engine is off the 'quarter tank' would happen, but, how do it know?

Urban myth?
Legal department mandated statement?

Someone I know carries one of those awful rolling portable black tanks as a solution to longer stays. Straps it to his ladder.
I guess an additional one could hold water. It's EPA approved food grade the last I looked.
Below is a link to most of my modifications either accomplished or pending.

Click on my pictures then click the pop-up for a full screen zoomable picture.
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Old 05-15-2023, 03:34 AM   #25
Senior Member
Brand: Thor Motor Coach
Model: Magnitude SV34
State: Florida
Posts: 221
THOR #20809
Titan and S&B make a 60 XXL replacements for the forward tank bringing your total fuel capacity to over 100gal on the Magnitude.
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Old 05-15-2023, 09:13 AM   #26
Brand: Thor Motor Coach
Model: Citation Sprinter 24sa
State: Florida
Posts: 79
THOR #13813
Zion GC and Yosemite tip. Be In position to get in by 9 am. After 10 RV parking is non existent. We took the Zion tram to the end then worked out way backwards getting on and off. The tram is great 😸.

GC has a dump station just outside there campground.
We stayed in the GC lodge 2 nights. I saw a couple of b plus discretely in the parking lot at night.
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