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Author Topic:   fuel stabilizer
waterwal posted 02-02-2003 10:22 PM ET (US)   Profile for waterwal   Send Email to waterwal  
(I hope this is posted in the correct place.)

Thinking I was prescient, I've had this portable gas container in the garage for 'emergencies' when I needed a little gas fast. Of course I never needed it, and it's now been there for 3 years. I put stabilizer in there before the end of the first year.

My question is that even with stabilizer, does gas still lose it's octane (just takes longer I would guess), or is this gas still ok to use?

Ferdinando posted 02-02-2003 11:21 PM ET (US)     Profile for Ferdinando  Send Email to Ferdinando     
Waterwal:

The maximum limit for gas with fuel stablizer is 15 months..... The gas you have in that tank should be close to varnish..

Fred

waterwal posted 02-03-2003 07:38 AM ET (US)     Profile for waterwal  Send Email to waterwal     
wow. almost used it. good thing i didn't. thanks!
whalerron posted 02-03-2003 08:52 AM ET (US)     Profile for whalerron  Send Email to whalerron     
Stabilizer must be added as soon as you buy the gasoline. The "lights" start evaporating away immediately and, as I understand it, gasoline has undergone a pretty dramatic change in its chemical makeup after 30 days if it didn't have stabilizer added to it immediately.
j_h_nimrod posted 02-04-2003 03:41 AM ET (US)     Profile for j_h_nimrod  Send Email to j_h_nimrod     
The problem with everything said so far is that it does not take into account the fuel stabilizers that are added by the refiner. Pure gas (no stabilizers, detergents, etc.) starts to lose octane very quickly and stabilizers are needed. How long do you think the gas you get has been out of the refinery? In the best of cases you might get gas that is a couple of days old, but I would bet that a large volume of the gas for the public market is over a month old.

I have used gas that has been stored for over 18 months, in drums, that is indistinguishable, in appearence and performance, from new gas. Without added stabilizer, fuel stored in a fairly full and air tight container will last for at least two years and certainly longer, probably much longer.

whalerron posted 02-04-2003 09:12 AM ET (US)     Profile for whalerron  Send Email to whalerron     
Phase separation:

"Some fuel system metal components will rust or corrode in the presence of water or acidic compounds. The additional water dissolved in oxygenated gasolines does not cause rusting or corrosion, but water from the phase separation of gasoline oxygenated with ethanol will, given time."
http://www.chevron.com/prodserv/fuels/bulletin/motorgas/ch4.shtml

"When gasoline is stored for longer than six months, or when storage conditions are not favorable, monitoring existent gum content may be necessary to make sure the stored gasoline will perform when used."
http://www.shelloil.com -->Products & Services-->Product Information-->Properties

Unless you are going to monitor your stored fuel for "phase separation" and "gum content", as noted by the gasoline manufacturers, use a stabilizer when storing fuel. The caveat is that the stabilizer works best if it is added to the fuel as soon as you buy it.

gnr posted 02-04-2003 10:07 AM ET (US)     Profile for gnr  Send Email to gnr     
Use it in your lawn mower or some other low compression four stroke, or put in in your car before your next fill up. It'll burn alright and it's better then dumping it somewhere.
whalerron posted 02-04-2003 12:14 PM ET (US)     Profile for whalerron  Send Email to whalerron     
Info pertaining to how long gasoline can be stored without deterioration:

"Chevron gasoline can be stored for a year without deterioration when the storage conditions are good -- a tightly closed container and moderate temperatures."
http://www.chevron.com/prodserv/fuels/bulletin/longterm_gasoline/

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