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Old 06-22-2012, 10:19 PM   #15
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"My last trip was 1400 miles, so for example it would have cost me an additional $10.34 to have a have a full water tank."

^That's what I'm talkin' bout!
$1 dollar to move a full tank of fresh water 140 miles. Can't beat that!
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Old 06-23-2012, 11:33 AM   #16
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It is not the pounds, it's the "Sail space" on that trailer (Wind resistance) which hammers you.. Thus there is no easy way to compute the difference 100 Gallons of water (rounded) would make.
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Old 06-23-2012, 11:38 AM   #17
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Originally Posted by IWillRVToo
That's what I'm talkin' bout!
$1 dollar to move a full tank of fresh water 140 miles. Can't beat that!
Fresh water is invaluable to have with you. Full grey and black water tanks, now that's a waste..........no really it's about 60 gallons of waste water. Make sure those tanks are empty before you leave.
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Old 06-23-2012, 12:06 PM   #18
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When I had a couple of Michelin and Marathon moments, the water I carried in my 5er was invaluable for clean-up. You never know when you are going to have any kind of "moment".
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Old 06-24-2012, 07:57 AM   #19
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Round it up so there's not so many zeros in the answer and it will make more sense to most of us.

At $0.20 cents per mile to drag the wet and loaded trailer, that's $200 for 1,000 miles.

So 6,000 pounds costs $200 per thousand miles. So 1,000 pounds costs $33.33 per thousand miles, or 3.3 cents per mile. Your load of water will weigh about one third of a thousand pounds, so your cost for hauling the water would be about 1.1 cents per mile ($0.11). 240 miles at $0.11 per mile would be $2.64 if the extra towing cost was because of weight alone.

But a big chunk of the cost to tow the trailer at highway speeds is to overcome aerodynamic drag (wind resistance) and not to pull the weight of the trailer. So until you know the cost of aerodynamic drag on your trailer, you cannot assign an exact cost to hauling just the weight of the water, but you know it will be less than $2.40 for the one-way trip to the lake.
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Old 06-24-2012, 08:06 AM   #20
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1.1 cents = $0.011. What's that do to the rest of your numbers?
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Old 06-24-2012, 08:57 PM   #21
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1.1 cents = $0.011. What's that do to the rest of your numbers?
You're right. There was a typo in the formula, but I actually used 0.011 to do the math, or 240 miles times $0.011 per mile = $2.64. So the answer didn't change, but there was a typo in the explanation.
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Old 06-24-2012, 09:41 PM   #22
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Wasn't picking on you. Glad the other #s worked out.
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Old 06-25-2012, 04:20 PM   #23
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fill it with whisky.. it weighs less
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Old 06-25-2012, 07:05 PM   #24
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If you are that worried about the weight of a few gallons of liquid leave both the water and fuel tanks empty when you go.
LOL. I will agree the question is what is you time and trouble worth.
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Old 06-25-2012, 07:17 PM   #25
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I have always filled up at home for one main reason, I put in softened water in the tank because it don't stink when I use the hot water heater, plus the soap suds better.
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Old 06-25-2012, 09:12 PM   #26
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I fill mine with soft water too. Right out of the water softener tank.
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Old 06-25-2012, 09:18 PM   #27
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If you pour a gallon of water into Lake Ontario...how much will the level of
the lake increase.....Is it worth calculating?

Ken
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Old 06-25-2012, 11:36 PM   #28
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I didn't know about this site a few years, but had the same question. My specifics were: Dodge3500 5.9L TD, DWR, 4X4 towing a Denali 260.


So I left San Diego empty for Idlewild and got about the same mileage as I always did...at least I couldn't calculate any difference.


So, there I am in the campground and started filling the fresh water tank - by hand - 5 gallons at a time...no - there were no full hook-up sites for me to have my own hose bib.


And ya'know what Murphys Law will do to you...as soon as you want to fill your jug, there's 2-3 other campers ahead of you that want to fill a pot for boiling tonights dinner!!!

Arrrrrggg!!! Never again will I do that!!!!!

There has to be some fuel savings, but it would take a comparetive run in your specific rig - dry vs. wet to calculate.
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