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General Category >> Rubber Side Down! >> Keeping moisture out of empty gas tank ?
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Message started by RazBarlow on 11/18/17 at 05:51:51

Title: Keeping moisture out of empty gas tank ?
Post by RazBarlow on 11/18/17 at 05:51:51

Does anyone have a method of keeping rust from forming on the inside of an empty spare tank ?
I have one that I won't be using for a month or so and I don't want it to rust on the inside .
Keeping it full of fuel is not an option as it will be stored inside .
Thank you

Title: Re: Keeping moisture out of empty gas tank ?
Post by justin_o_guy2 on 11/18/17 at 07:18:39

Is it rusting now?

Title: Re: Keeping moisture out of empty gas tank ?
Post by piedmontbuckeye on 11/18/17 at 08:17:50

44776C7477647A7961160 wrote:

What I do with my BMW tank during the winter months is to remove it, completely drain it out, and then take a quart or two of good clean motor oil (must have at least 1,400 ZDDP! - just kidding) and put into tank. Roll it around so that every surface is coated. Then in the spring, I would drain out oil from tank, wash out a bit with clean gasoline, and voila! Ready for summer.

I have also heard that using the Marine version of StaBil will also help if you want to keep gasoline in the tank.

Title: Re: Keeping moisture out of empty gas tank ?
Post by Dave on 11/18/17 at 08:47:29

Motor oil is a good option.....not too hard to clean up later on.

Another option is to make sure it is dry - then tape the petcock and fuel cap area with packaging tape or duct tape to keep moist air from getting inside. If you don't store it in a damp area...chances are it is not going to develop any rust.

Title: Re: Keeping moisture out of empty gas tank ?
Post by piedmontbuckeye on 11/18/17 at 08:55:56

Dave: "Motor oil is a good option.....not too hard to clean up later on."

Yes, but does it have enough ZDDP??? ;D

Title: Re: Keeping moisture out of empty gas tank ?
Post by justin_o_guy2 on 11/18/17 at 10:12:34

If it's got rust stains, no pitting, you can rinse it with Ospho, following the directions completely. Then the blow dryer , oil, seal. Foil and tape.
Or drop a few Do not eat packs in.
Probably not a good idea to drop them in an oiled tank.

Title: Re: Keeping moisture out of empty gas tank ?
Post by Gary_in_NJ on 11/18/17 at 10:54:50

Keep it full. Rust can’t form in fuel.

Title: Re: Keeping moisture out of empty gas tank ?
Post by ohiomoto on 11/18/17 at 12:09:54

OP states keeping it full is not an option......

6B58435B584B55564E390 wrote:

Keeping it full of fuel is not an option as it will be stored inside .
Thank you

---------------------

Might be a good time to Red Kote.

Title: Re: Keeping moisture out of empty gas tank ?
Post by RazBarlow on 11/18/17 at 12:16:06

Ohio,
You are correct , I will be keeping it inside .
I have thought about putting a couple of those " do not eat " packets on a string and put them in the tank

Title: Re: Keeping moisture out of empty gas tank ?
Post by ohiomoto on 11/18/17 at 12:22:31

RED KOTE ;)

Title: Re: Keeping moisture out of empty gas tank ?
Post by verslagen1 on 11/18/17 at 13:28:00

7E74707A71787C752B2D29190 wrote:

Keep it full. Rust can’t form in fuel.

yeah but that ethanol crap...
I was cleaning some parts before welding and it was a little damp when I threw it in the gas. Took them out and they had spots on them from the ethanol and a little bit of water.

if it's empty, leave it empty. pour a cup of old oil in, swirl it around, drain it out, cap it tape it, done.

if you don't like the oil idea, use diesel fuel. it leaves a oily film.

Title: Re: Keeping moisture out of empty gas tank ?
Post by twhitus on 11/18/17 at 13:41:38

Ive used "damp rid" from walmart before, its similar to those things in shoe boxes. Hang from a string put the cap on and it will remove any moisture in there. Fairly cheap, 2 to 3 bucks.

Title: Re: Keeping moisture out of empty gas tank ?
Post by Eegore on 11/20/17 at 07:17:39

Depending on how humid it is where you are those silica gel packs will prevent moisture build-up.

I live in a relatively dry area and toss those in tanks that will sit for years and have had zero issue.

Title: Re: Keeping moisture out of empty gas tank ?
Post by norm92de on 11/20/17 at 07:55:36

A related comment.

We had some sterno fuel for a fondue, mostly alcohol, in steel cans.
Anyway, water collected in the bottom of the cans and eventually rusted through the metal. I'd hate to think that could happen to my fuel tank. :'(