Full tank to travel? - Fiberglass RV


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Old 09-23-2011, 07:55 AM   #1
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Name: Aaron
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Full tank to travel?

Do you travel with a full fresh water tank if you can fill up at a State camp ground when you get there? As I was filling my 25 gal. Tank last night I got thinking about the 200 pounds I was adding and started to wonder what everyone else does. I just like brushing our teeth and washing faces with our own well water. I guess it depends on the distance and if you will need it for potty breaks.
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Old 09-23-2011, 08:14 AM   #2
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Traveling we typically run with a 1/4 tank. When entering a National Park or where water is not available we fill our tank.
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Old 09-23-2011, 08:16 AM   #3
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I travel with ALL tanks empty. I fill at the campground or hookup. I only use the water in the trailer for flushing and doing dishes anyway. I buy or bring bottled water for cooking and brushing my teeth. The plumbing in my trailer is 23 years old. There's nothing I've been able to do to get rid of the bad "taste" of plastic. I think a prior owner winterized using automotive antifreeze rather than RV antifreeze.
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Old 09-23-2011, 08:49 AM   #4
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I fill tank at the campground and carry 5 gal from home.
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Old 09-23-2011, 09:31 AM   #5
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Last year traveling through the hot Nevada desert I had barely enough water to help out a family with an over heated engine.
Next stop I filled the water tank.
I traveled over 4000 miles with a full water tank and noticed no difference in my fuel mileage.
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Old 09-23-2011, 10:00 AM   #6
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Every 100 pounds in the trunk will reduce your fuel ... lowers gas mileage by 0.4 percent.
20 gal water tank at 8.35 LBS per gal =167 lbs so you would loose 0.668% MPG

If you got 16 MPG with a empty water tank

Now you would get 15.3 MPG with a full 20 gal water tank


Under-inflated tires lowers gas mileage by 0.4 percent for every one pound of drop in pressure of all four tires.

For every ten miles per hour , you lose as much as 15%.
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Old 09-23-2011, 10:09 AM   #7
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Quote:
Originally Posted by Perry J View Post
Last year traveling through the hot Nevada desert I had barely enough water to help out a family with an over heated engine.
Next stop I filled the water tank.
I traveled over 4000 miles with a full water tank and noticed no difference in my fuel mileage.
John
Aerodynamics is generally as important as weight when towing a trailer. An empty enclosed trailer can actually be more stress on the TV than a loaded open trailer (Within reasonable parameters). The aerodynamics are generally a constant,but the closer you get to the TV's capacity the more a couple hundred pounds can make a difference. In the realm of small lightweight fiberglass trailers, small TV's are common and a little extra weight means more,so it is important to get to know what works best for your individual rig.
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Old 09-23-2011, 11:19 AM   #8
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Every 100 pounds in the trunk will reduce your fuel ... lowers gas mileage by 0.4 percent.
20 gal water tank at 8.35 LBS per gal =167 lbs so you would loose 0.668% MPG

If you got 16 MPG with a empty water tank

Now you would get 15.3 MPG with a full 20 gal water tank


Under-inflated tires lowers gas mileage by 0.4 percent for every one pound of drop in pressure of all four tires.

For every ten miles per hour , you lose as much as 15%.
That weight calculation is for an average car I'm sure It has a kind of counter effect as the weight and power of the vehicle goes up the less the effect.
A small underpowered vehicle will loose much more than a large powerful one.
I once carpooled 30 miles to work with a guy who drove a Honda Civic, It cost him a little more than 5MPG to carry me, and when he rode in my Fairmont the loss was negligible.(less than 1MPG) of course the Civic went from 37mpg to 32mpg and the Fairmont went from 22MPG to 21MPG.
Also generally speaking, acceleration costs more than speed.
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Old 09-23-2011, 11:52 AM   #9
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With the "monster" 29' TT I travel with a full tank , 25gal, the ventura is another story, the existing tank was old, brittle and gross looking. So i yanked it and welcomed the extra storage, we use it for short weekend trips.
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Old 09-23-2011, 03:22 PM   #10
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I dont tow with water for two reasons - older trailer older tanks - who knows with the water rocking around in the tank when something might give. The other is weight & balance - carrying the water lowers gas milage and it also lowers the tongue weight more than I would like.

I will fill up when I arrive at the park or if I know they dont have water I will stop at a gas station that is close to where I am going to fill. I carry a large bottle of water in the fridge for brushing my teeth and drinking.
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Old 09-23-2011, 11:37 PM   #11
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Quote:
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Do you travel with a full fresh water tank if you can fill up at a State camp ground when you get there?
If water is going to be available at the campground we are heading for, then our standard procedure is to drive with the tank empty. However, when we go from San Diego to Quartzsite, Arizona for a weekend in January and February we usually fill the tank and take the mpg hit. On those trips we also drive home with the gray/black tanks full and dump at home. (We have full hook-ups in the yard for the Fiber Stream.)
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Old 09-24-2011, 12:08 AM   #12
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I always leave home with the freshwater tank full, so I know what kind of water I will be drinking, cooking, washing and brushing my teeth with
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Old 09-24-2011, 09:11 AM   #13
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We always travel with at least several gallons on board. More times than I can count one or the other of us has had an emergency bathroom situation.
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Old 09-24-2011, 07:19 PM   #14
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we have never filled our water tank yet in 6 years of ownership.....i bring about 4 liters per day for tea/teeth/cooking. if there is water available, i use it for dishes. if no water is available, i dip into our drinking water supply but sparingly. i do, however, ensure that the portapotty flush reservoir is full if no facilities will be available for our use.
i have found that alot of the camgrounds' water has a "funny"/metallic taste that i object to---not that the water itself is bad, but it taints the taste of my tea. once i boiled up some pasta in water from the tap and it tasted so awful that i pitched the whole lot of it!
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