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Old 02-12-2012, 09:50 PM
a1bigtuna a1bigtuna is offline
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Default How long will Sta-bil keep gas good for use?



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I have something called Sta-bil for keeping gas stored. Does anyone know how long it will keep gas good? If you add it a second time, will it double whatever the storage time is? Talking about the 89 octane gas.
Old 02-12-2012, 10:17 PM
RavenLunatic RavenLunatic is offline
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I have used several fuel stabilizers over many years. Most of my initial observations were with experiences with my charter boat.

Stabil- I would typically get 1 to 1.5 years out of treated fuel. Re-treating didn't seem to help.

Seafoam- 2-3 years. Added benefit of fuel system cleaners in the chemistry of Seafoam.

Pri-G- 5+ years. (I recently ran some fuel originally treated with Pri-G 7.25 years ago. I did re-treat it before I ran it. Fuel worked as it should.)

All I use now is Pri-G and Pri-D.
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Old 02-12-2012, 11:03 PM
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Here's an interesting thing about Pri-G: It's supposed to be able to restore bad gas.

It strikes me as an interesting prep. For about $35 you can have the ability to restore about 500 gallons of bad gas, and if TSHTF I have the feeling there will be a lot of that in abandoned cars trapped behind collapsed bridges, things like that.
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Old 02-12-2012, 11:05 PM
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I'm a fan of PRI-G for gasoline, three plus years and counting...
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Old 02-13-2012, 06:53 PM
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I have about 5 - 5gal. cans stored with the recommended amount of Stabil -- but every 6 months or so I use it in the cars and buy fresh to store

I should probably get more
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Old 02-13-2012, 07:16 PM
RazorCityDen RazorCityDen is offline
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Good Grief! You have to be the only person on the forum not to have read the Sta-Bil infomercial called 'Patriots'. Ha!Ha!Ha!
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Old 02-13-2012, 07:20 PM
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2 years most ive gone. then rotated out in the lawn mower. milage or mowage in this case droped a bit. i could tell it was not going as far as fresh gas but it ran fine
Old 02-13-2012, 08:05 PM
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Stored fuel loses octane over time. In addition gas contains 10% ethanol which is hydroscopic that means it attracts water from air or condensation.This is what causes fuel to go bad over time. As stated already Sta-bil will give you about a year. Seafoam is another good additive that will give you a year to 18 months. These additives keep the ethanol and water from separating and sitting in a layer on the bottom of your fuel tank. Think oil and water and how they don't mix. This is what happens with modern fuel blends that contain ethanol. Being a marine mechanic I have seen this happen in untreated fuel in as little as 3-6 months. I would highly recommend using one of the above mentioned additives and rotating your supply every 18 months. Can you go longer sure, but if your counting on that generator or other equipment starting and running reliably fresh properly stored fuel is key.
Old 02-13-2012, 08:12 PM
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In South Dakota we have a choice on buying gas with or without ethanol...On things i know i will be storing i use 91 % octane gas without ethanol as it keeps better....I spoke with a Stabil tech in 2011 and he said if you put in double the recommended amount then you can get 2 years of storage.....I start up everything about every 6 months.......
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Old 02-13-2012, 08:15 PM
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Stored fuel loses octane over time. In addition gas contains 10% ethanol which is hydroscopic that means it attracts water from air or condensation.This is what causes fuel to go bad over time. As stated already Sta-bil will give you about a year. Seafoam is another good additive that will give you a year to 18 months. These additives keep the ethanol and water from separating and sitting in a layer on the bottom of your fuel tank. Think oil and water and how they don't mix. This is what happens with modern fuel blends that contain ethanol. Being a marine mechanic I have seen this happen in untreated fuel in as little as 3-6 months. I would highly recommend using one of the above mentioned additives and rotating your supply every 18 months. Can you go longer sure, but if your counting on that generator or other equipment starting and running reliably fresh properly stored fuel is key.
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Old 02-13-2012, 10:28 PM
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Don' use Sta-bil. don't use ethanol gas.
Old 02-13-2012, 10:37 PM
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Way gas is increasing in price, Im thinking I need a heck of a lot of it and tons of Pri-G. Think how much money one could make

Seriously I have heard that the gas additives for marine use usually last much longer than those for autos, etc. Not sure if that is true.
Old 02-13-2012, 11:20 PM
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This is what I use...I'm in the Marine Biz.
http://www.mertenmarine.com/servlet/...h--Fuel/Detail
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Old 02-13-2012, 11:29 PM
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how long does regular untreated 87 store for?
Old 02-13-2012, 11:46 PM
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I've used Pri-G treated ethanol free 87 octane gas over 2 years in storage in my truck and cars. I did add another dose of Pri-G before using it. Zero problems. Disclaimer: I am in Florida and the stored gas never got below 30 and probably not much over 90. Still, two years in storage and everything ran just fine.

How much longer it could have gone I don't know. But, why not rotate it at that point, or sooner, if you have that option.
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Old 02-13-2012, 11:59 PM
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Quote:
Originally Posted by aerbourne View Post
how long does regular untreated 87 store for?
Just have to remember that Ethonal attracts water so if you store it a full tank with a good treatment is the way to go.....
We take out a lot of fuel from customer boats that dont use any fuel treatment over the winter(and even summer when they let it sit to long) and leave thier tanks less then 3/4 full and most is because of water contamination...

I only buy 87 and i have yet to have any problems but i treat all my fuel,I rotate 220 gallons once a year that i have for back up.
Old 02-14-2012, 06:01 PM
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I've used Sta-Bil sucessfully for 1+ years on non ethonaol gas.

But I'm going to look at Pri-G!!!!
Old 02-14-2012, 07:56 PM
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Quote:
Originally Posted by captbob View Post
How much longer it could have gone I don't know. But, why not rotate it at that point, or sooner, if you have that option.
I used to treat my fuel then rotate it every year or two. But when you think about it, that doesn't really make much sense. I started keeping my stored fuel rotated regularly. That way I know I'm starting off with fresh fuel to start with. Then if the SHTF, I'll treat it and get maximum life. It's less expensive that way, and you don't have to worry about the SHTF a week before your usual rotation starts, and going into the SHTF with fuel that already has a year or two on it. Luckily I store diesel now, and it has a lot longer storage life. Especially with PRI-D.
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Old 02-15-2012, 09:37 AM
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I've gotta ask: where are you guys buying non-ethanol gasoline?
Old 02-15-2012, 10:14 AM
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Go to your local airport and buy Av gas. It doesn't go bad. Second choice, Sea Foam.
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