Old gas ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

697498chevy · 03-28-2009, 02:29 PM

How long does it take for gas to go bad ? My '69 been down for about seven weeks . I'm waiting on a part . Should I add some Sta-bil . Thinking you add that while it's still running . THANKS in advance for any thoughts .

**americanmusc1e** · 03-28-2009, 03:54 PM

Quote:

Originally Posted by 697498chevy

How long does it take for gas to go bad ? My '69 been down for about seven weeks . I'm waiting on a part . Should I add some Sta-bil . Thinking you add that while it's still running . THANKS in advance for any thoughts .

sta-bil says 30 days but my dad (he works on gas pumps so he knows quite a bit about gas) says it will last longer than that but it depends on the size tank, you could probably go three or four months with no problem

but sta-bil is cheap insurance for a carburetor rebuild

697498chevy · 03-28-2009, 04:47 PM

Thanks !

Blazer1970 · 03-29-2009, 06:33 AM

My Blazer sits in storage for 4 - 5 months every year. I just shut if off and disconnect the battery. In the spring I reconnect the battery and start the truck and go. I have never had any even remotely fuel related problem.

63 & 64 Bowties · 03-29-2009, 06:43 AM

No worries in the winter months. Summer is a different story. In warm weather you'll lose the "light-ends" to evaporation.

(I recently retired from Shell Oil Company, where part of my job was quality control at a distribution terminal)

**'68OrangeSunshine** · 03-29-2009, 09:01 AM

I keep gas in jerry cans w/Sta-Bil [2 Oz/5Gal] for almost a year. No problems.

Sport/Truck · 03-29-2009, 09:37 AM

Sealed metal cans hold the gas longer. I had about 10 gallons in my trucks tank for 2 years, I didn't want to run it in my new motor. So I drained it and it seemed fine, so I used it in my commuter with no problems.
My truck is garaged and is always cool inside, so that probably helped.
s/t

cdowns · 03-29-2009, 10:58 AM

never had any real problems to speak of with gas 6-12months old// i think the whole stabil thing is bull for the most part

697498chevy · 03-29-2009, 11:08 AM

THANKS for all the good info !

boundstaffpress · 03-29-2009, 06:44 PM

I recently fired up a truck with 3 year old gas. Ran fine. It took a little gas down the carb to prime it. Truck sat outside in KS for almost all of that time.

69halfton · 03-29-2009, 07:00 PM

I use fuel stabilizer for peice of mind with my truck. I have a friend had an old caddy stationwagon sat for 5 years and it ran on that gas with out stabilizer in it...

depends on the quality of gas, and the climate your in i geuss... I know the snowmobiles have to be stored with it, they dont like the old gas in the fall, it tends to foul the plugs..

I pulled 8 year old gas out of a tank once, threw it out on the grass, and threw a match on it, the match was quenched by the old gas and went out

Longhorn Man · 03-29-2009, 07:25 PM

I've seen a bug that was parked for 10 years fire up on the 1/2 tank of fuel with sta-bil in it that was there when it was parked.
I've seen 12 month old gas with no treatments at all not let an engine fire.

03-28-2009, 02:29 PM	#1
697498chevy Registered User Join Date: Jan 2009 Location: South Carolina Posts: 265	Old gas ? How long does it take for gas to go bad ? My '69 been down for about seven weeks . I'm waiting on a part . Should I add some Sta-bil . Thinking you add that while it's still running . THANKS in advance for any thoughts .

03-28-2009, 04:47 PM	#3
697498chevy Registered User Join Date: Jan 2009 Location: South Carolina Posts: 265	Re: Old gas ? Thanks !

03-29-2009, 06:33 AM	#4
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: Old gas ? My Blazer sits in storage for 4 - 5 months every year. I just shut if off and disconnect the battery. In the spring I reconnect the battery and start the truck and go. I have never had any even remotely fuel related problem. __________________ Tim

03-29-2009, 06:43 AM	#5
63 & 64 Bowties and a few others Join Date: Jun 2007 Location: Blue Ridge Mountains of VA Posts: 5,638	Re: Old gas ? No worries in the winter months. Summer is a different story. In warm weather you'll lose the "light-ends" to evaporation. (I recently retired from Shell Oil Company, where part of my job was quality control at a distribution terminal) __________________ Bill US Army Vet -193rd Infantry BlueRidgeMuscleCars.com “The greatness of a nation and its moral progress can be judged by the way its animals are treated” Gandhi

03-29-2009, 09:01 AM	#6
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,438	Re: Old gas ? I keep gas in jerry cans w/Sta-Bil [2 Oz/5Gal] for almost a year. No problems. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

03-29-2009, 09:37 AM	#7
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Old gas ? Sealed metal cans hold the gas longer. I had about 10 gallons in my trucks tank for 2 years, I didn't want to run it in my new motor. So I drained it and it seemed fine, so I used it in my commuter with no problems. My truck is garaged and is always cool inside, so that probably helped. s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

03-29-2009, 10:58 AM	#8
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Old gas ? never had any real problems to speak of with gas 6-12months old// i think the whole stabil thing is bull for the most part __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

03-29-2009, 11:08 AM	#9
697498chevy Registered User Join Date: Jan 2009 Location: South Carolina Posts: 265	Re: Old gas ? THANKS for all the good info !

03-29-2009, 06:44 PM	#10
boundstaffpress Jamie Hyneman is my twin Join Date: Nov 2005 Location: La Junta, Colorado Posts: 705	Re: Old gas ? I recently fired up a truck with 3 year old gas. Ran fine. It took a little gas down the carb to prime it. Truck sat outside in KS for almost all of that time. __________________ Justin SOLD 1967 K10 Fleetside, 283, Front and Rear Posi SOLD Color Wiring Diagrams Now in High Resolution V8 and Cab and Cab and Chassis

03-29-2009, 07:00 PM	#11
69halfton Registered User Join Date: Apr 2007 Location: King City, Ontario, Canada Posts: 974	Re: Old gas ? I use fuel stabilizer for peice of mind with my truck. I have a friend had an old caddy stationwagon sat for 5 years and it ran on that gas with out stabilizer in it... depends on the quality of gas, and the climate your in i geuss... I know the snowmobiles have to be stored with it, they dont like the old gas in the fall, it tends to foul the plugs.. I pulled 8 year old gas out of a tank once, threw it out on the grass, and threw a match on it, the match was quenched by the old gas and went out __________________ - Jason If you can turn, Youre not going fast enough. Favorite caption: first car to 200 mph in the 1/4 mile, no parachute, drum brakes all the way around.. ..back when men were men.

03-29-2009, 07:25 PM	#12
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Old gas ? I've seen a bug that was parked for 10 years fire up on the 1/2 tank of fuel with sta-bil in it that was there when it was parked. I've seen 12 month old gas with no treatments at all not let an engine fire.



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