long term gasoline storage?

[terracore]

How long are you getting out of stored gas before it goes bad? I buy ethanol free for the gas cans and add PRI-G. If I have some left in the can after a year I dump it into my car and get fresh gas.

More recently I found a gas can I had neglected to swap out. The gas was about 16 months old. Possibly a little older. When I put it into my lawn mower it started right up but kept sputtering and dying under any kind of load. I added some PRI-G to the mower and it immediately ran like a champ again. I had no idea that four months worth of extra storage would affect gas in this manner.

[leilanidude]

16 months is a long time for gas! I would go for no longer than 6-8 months on any sort of regular basis. Rotate often.

[alaskyn66]

With a fuel stabiliser. It can last up to two years.been there done that.past that and it gets 'icky'

[terracore]

PRI-G is supposed to make gas last a year (seems to work, that is when I normally swap it out) and then requires another dose if you want it to last another year. Supposedly they have revitalized 15 year old gas with it. Can't vouch for that but it brought that 16 month old gas back to life instantly.

[leilanidude]

In a lawn mower - sure. In your newer car - Nope.

[alaskyn66]

I always used sta-bil in Alaska to keep our 100 gl. Tank fresh. It never failed me. Between snow machines and plow trucks. Always had fresh gas.

[terracore]

"In a lawn mower - sure. In your newer car - Nope."

Not trying to disagree but I've read the opposite is true (?) the car's computer will adjust to keep the car running with bad gas, the lawnmower can't do that.

ETA: I'll find out tomorrow! I just dumped about 4 gallons of PRI-G treated 16 month old gas into my car's mostly empty gas tank.

"I always used sta-bil in Alaska to keep our 100 gl. Tank fresh."

I thought this was interesting (from the Sta-bil web site):

https://www.goldeagle.com/tips-tools/top...-debunked/

Myth #4: “STA-BIL branded products are just kerosene.”

Here’s our official answer, direct from Chief Chemist and V.P. Of Product Engineering Mike Profetto:

“STA-BIL brand additives use a highly-purified petroleum distillate to deliver our additive package to the fuel. This solvent allows the additives to quickly blend completely into the fuel. The additives themselves would be too concentrated to blend easily, especially in cold weather. Use of more flammable solvents like gasoline would make shipping and storage too dangerous. The addition of the recommended dose of STA-BIL product to fuel has always been safe. Dozens of Original Equipment Manufacturers (OEMs) have confirmed this by testing and recommending our products.”

How come during no portion of the answer, they didn't just say, IT ISN'T JUST KEROSENE?

[leilanidude]

"In a lawn mower - sure. In your newer car - Nope."

Not trying to disagree but I've read the opposite is true (?) the car's computer will adjust to keep the car running with bad gas, the lawnmower can't do that.
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Your car's repairs will cost a lot more than on a lawnmower...

[terracore]

You have a very good point. I certainly wouldn't stockpile gasoline for vehicles in this manner.

[alaskyn66]

Newer cars with computers. I don't know any one who has tried it..fwiw.