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Old 07-21-2012, 09:14 PM   #1
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Adding Mineral Oil to Deep Cycle Batterys

I read on another thread about putting mineral oil in their deep cycle battery's. Is anyone familiar with this?
What is the reason for adding mineral oil to the battery?
Does it increase the life of the battery?
How much oil is put in each cell?
I have two small 6 volt coach battery's - 3 cells on each battery.

Thanks
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Old 07-21-2012, 09:17 PM   #2
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2 ozs in each cell it is suppost to keep from boiling the battary dry
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Old 07-21-2012, 09:33 PM   #3
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I've finally broke down and am going to do this in my coach and golf cart.

I thought it was crazy at first but quite a number of folks whose judgement I respect swear by it. It's supposed to minimize the boiling and out-gassing... which, in turn will probably increase battery life.

I'm going to double check on the recommended amount for 6v and 12v though. My fading memory is different than what truck91 recommended.

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Old 07-21-2012, 10:02 PM   #4
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Adding Mineral Oil to Deep Cycle Batterys - Google Search
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Old 07-21-2012, 10:16 PM   #5
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I added two ounces of mineral oil to my four 6 volt batteries over two years ago and have not added any water since. The corrosion has disapeared. We live in the MH six months each year and keep it plugged in all the time.
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Old 07-21-2012, 11:42 PM   #6
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This company Thermoil.com - Up to 3 times Longer Battery Life! Guaranteed. use to make batteries years ago, but now makes the oil additive for large industrial companies using large batteries.

My coach use to produce a bunch of battery acid. I tried the Thermoil and the battery caps that are suppose to recycle the acid back into the battery. They helped with about 80% of the issue.

We had some friends with a similar coach and their battery bay was always bone dry. Two years ago I replaced my four Trojan 6 volt batteries with new Trojan batteries.

I called Magnum, the maker of my Inverter/Charger, to make sure I had the charger set correctly. They told me I was overcharging the batteries and gave me the correct settings. After that, my batteires quit off gassing.

I also added a batteyr watering system. They're pricey, but worth every penny. I now check my batteries about once every four months. I give the bulb a squeeze or two and the batteries are full. The BEST part, my battery bay is now dusty dry.

Not everyone has a battery charger that can be fine tuned for perfect charging, but I think the watering system is better than the oil or caps. It keeps the battery system sealed.
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Old 07-22-2012, 12:53 PM   #7
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Been doing it for years, really cuts water loss.
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Old 07-22-2012, 12:58 PM   #8
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Quote:
Originally Posted by RickO View Post
I've finally broke down and am going to do this in my coach and golf cart.

I thought it was crazy at first but quite a number of folks whose judgement I respect swear by it. It's supposed to minimize the boiling and out-gassing... which, in turn will probably increase battery life.

I'm going to double check on the recommended amount for 6v and 12v though. My fading memory is different than what truck91 recommended.

Rick
Rick - I'm posting to be subscribed so I can hear what recommendations you come up with.... Let us know, eh?
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Old 07-22-2012, 03:52 PM   #9
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If your batteries are ever in any position besides vertical your plates will be coated with oil.
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Old 07-22-2012, 04:45 PM   #10
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Quote:
If your batteries are ever in any position besides vertical your plates will be coated with oil.
I think if his batteries are ever in a position that isn't vertical, the least of his worries will be oil on the plates.

The oil floats on top of the acid, not down in the plates.
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Old 07-22-2012, 04:53 PM   #11
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I did it in 2004 on my OEM U-2200's, they lasted just short of 10 years. I bought new Interstates and last week I put 4 oz of mineral oil in each cell.
2 oz is for 12 volt batteries (6 cells per battery) and 4 oz is for 6 volt batteries (3 cells per battery).
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Old 07-24-2012, 12:25 PM   #12
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Do you take some water out to add the oil, or wait for the water to get a little low?
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Old 07-25-2012, 08:43 AM   #13
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Quote:
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Do you take some water out to add the oil, or wait for the water to get a little low?
If your batteries and coach are normal it will only be a matter time befoe you will need to add water. At that time add two oz to each cell.

Three coaches and many miles later it has worked for us. You should see a reduction in gassing imediately. All you are doing is creating an oil slick over the water thereby not allowing so much evaporation or boiling gasses to escape. It's not rocket science, but it works.

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Old 07-25-2012, 09:09 AM   #14
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Gotta ask... if it's such a great idea why doesn't a single battery manufacturer (that I can find) do this or even recommend it? Not trying to be contrary, it just seems like a reasonable question...
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