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Old 03-14-2011, 11:57 PM   #1
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Mineral Oil in batteries - 1 year

I replaced all my batteries last year which included 4 - 6 volt and one large 12 volt chassis battery.

I put about 2 ounces of mineral oil in each cell when I installed the batteries as many have done.

After a year I have had almost no corrosion and have not needed to add water. My batteries were on float charge all winter long.

In the past, I would have had to add water several times and cleaned up the corrosion mess that occured.

From my perspecitve, adding mineral oil really works. The oil works as a seal and barrier almost eliminating corrosion and loss of moisture from the cells.

There doesn't seem to be a down side to this.

Chuck
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Old 03-15-2011, 10:04 AM   #2
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Sounds like you have a winner plan there... As it happens I need to buy a gallon of mineral oil for another project, a few ounces for the cells... Just might work.
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Old 03-15-2011, 10:07 AM   #3
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Same experience here with the mineral oil...but I also suspect that much of the improvement in corrosion and water use has been the intelligent IOTA converter I installed around the same time.

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Old 03-27-2011, 10:24 AM   #4
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I'm going on 4 1/2 years with baby oil in the house batteries- no corrision, and I add a bit of water twice a year- .

Works for me.
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Old 03-27-2011, 10:56 AM   #5
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I'm curious what effect the oil causes if it gets on the lead plates of the battery.
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Old 03-27-2011, 01:30 PM   #6
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I did the mineral oil thing on my 4+ year old Trojans.

The mess was certainly less and the refill frequency was cut down.

The batteries failed at @ 6 years old. I do not know if the oil or age was the cause.

But, I have not added mineral oil to the new batteries. Just chicken I guess.
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Old 03-27-2011, 02:07 PM   #7
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How much mineral oil in each cell?
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Old 03-27-2011, 02:37 PM   #8
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Quote:
Originally Posted by gesmone View Post
How much mineral oil in each cell?
Two ounces.
J
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Old 03-27-2011, 02:55 PM   #9
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I used 1 1/2 oz's per cell- 2 oz's sounds good also.

Some years ago, an old timer suggested this on this forum.

Some folks don't believe in it, but the weight of oil, about 6.7 lbs/gal vs. water, at about 8 lbs/gal explains the theory- the oil will float on top of the water and reduce the boil off effect of the battery charging operation.

Don't know what will happen to the plates if oil comes in contact with them. Just check and add water as necessary to keep the batteries full. I think you'll find a lot less water will be needed.
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Old 03-28-2011, 12:21 AM   #10
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deandec's batteries lasted 6 years.

Not completely sure on RV batteries but six years sounds pretty good. If I were to lose a year on the batteries it is well worth not having to go through the process of cleaning and watering at frequent periods.

The mineral oil isn't going to hurt anything.

Chuck
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