 Old gas, How long can gas be in the tank and still good |
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| willieg |
 Feb 16 2024, 10:54 PM
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#1
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Member  Group: Members Posts: 132 Joined: 13-August 18 From: Pleasant Hill Member No.: 22,389 Region Association: Northern California 
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I am just about finished doing a five lug conversion, with roll bar, with custom door handles, blah, blah blah. As a result, the car has been off the road for about a year. I drained the gas tank and have replaced with fresh gas. But I was wondering how long some of you have left gas in the tank of a fuel injected car and not had any problems when you restarted the car. Just wondering if I was too hasty.
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Replies(1 - 11)
| Joe Bob |
Feb 17 2024, 01:29 AM
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#2
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Retired admin, banned a few times Group: Members Posts: 17,427 Joined: 24-December 02 From: Boulder CO Member No.: 5 Region Association: None |
I wouldn't worry but you can dump a cab of Stabil if you feel like it.....
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| peteinjp |
Feb 17 2024, 03:28 AM
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#3
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Member Group: Members Posts: 201 Joined: 15-July 21 From: Japan Member No.: 25,723 Region Association: None
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I’ve had gas in my a fuel injected car on stands for years and it starts and runs great. Carbs are another story as gas in the jets can dry and clog. Stabil etc. help with that.
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| StarBear |
Feb 17 2024, 08:26 AM
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#4
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Senior Member Group: Members Posts: 1,902 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States
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For me, the issue was water condensation in the tank. Keep the tank full and add Stabil. Simple. Cheap. No problems. (IMG:style_emoticons/default/biggrin.gif)
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| jhynesrockmtn |
Feb 17 2024, 09:42 AM
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#5
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Member Group: Members Posts: 420 Joined: 13-June 16 From: spokane wa Member No.: 20,100 Region Association: Pacific Northwest
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with ethanol, about a week
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| brant |
Feb 17 2024, 09:55 AM
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#6
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914 Wizard Group: Members Posts: 11,628 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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I agree
Pump gas does not last long Measured in weeks if it didn’t have stabil since initially parked It could run still Lots of water More likely to vapor lock |
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| dr914@autoatlanta.com |
Feb 17 2024, 10:05 AM
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#7
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914 Guru Group: Members Posts: 7,875 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
if it smells like shellac it is bad, if hi test with gas stabilizer and a dry dehumidified environment, we have seen it last two years
QUOTE(willieg @ Feb 16 2024, 09:54 PM)  I am just about finished doing a five lug conversion, with roll bar, with custom door handles, blah, blah blah. As a result, the car has been off the road for about a year. I drained the gas tank and have replaced with fresh gas. But I was wondering how long some of you have left gas in the tank of a fuel injected car and not had any problems when you restarted the car. Just wondering if I was too hasty. |
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| technicalninja |
Feb 17 2024, 10:46 AM
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#8
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Senior Member Group: Members Posts: 1,274 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region
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I prefer to have E15 that is less than 12 months old.
If the tank is already nasty inside less than 6 months. Modern plastic tank cars can last 1 year in optimal conditions. (inside a garage). Nobody close to me will take bad gas. When I have a customer car with bad gas I slowly feed it to my 300k 97 Chevy 3/4 ton van. 5 gallons bad with 15 gallons fresh doesn't seem to affect it at all. I'm NOT a greenie but I DON"T dump that crap into the ground. I feed it to the "Zepplin" slowly... Non-ethanol gas will last a decade. I have a customer that feeds his stable of old school hot rods 100 octane low-lead (av gas) and his fuel is OVER 6 years old. Works fine! |
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| windforfun |
Feb 17 2024, 07:27 PM
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#9
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Senior Member Group: Members Posts: 1,809 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
I pour two pints of tequila (CH3CH2OH) into my tank every couple of months followed by a pint of nitromethane (CH3NO2). When I hit the accelerator I have all I can do to keep my hands on the steering wheel. If you try this, I strongly suggest you go to the bathroom beforehand. Oh, & take your hat off too. And, the fuel mixture never goes south.
(IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/lol-2.gif) |
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| technicalninja |
Feb 18 2024, 11:58 AM
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#10
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Senior Member Group: Members Posts: 1,274 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region
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If that makes your 914 so fast you're having trouble holding the steering wheel, then you're pouring the CH3CH2OH into your mouth, not the gas tank...
(IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) As a child I found out that if you pour a line of Nitro RC fuel across a street at night and light it, it burns with a truly weird purple/red/blue flame much to the terror of anyone driving a car down the same street! The flames were approximately 18" high. Like driving through the gates of HELL... (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) |
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| windforfun |
Feb 18 2024, 05:09 PM
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#11
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Senior Member Group: Members Posts: 1,809 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
QUOTE(technicalninja @ Feb 18 2024, 09:58 AM) If that makes your 914 so fast you're having trouble holding the steering wheel, then you're pouring the CH3CH2OH into your mouth, not the gas tank... (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) As a child I found out that if you pour a line of Nitro RC fuel across a street at night and light it, it burns with a truly weird purple/red/blue flame much to the terror of anyone driving a car down the same street! The flames were approximately 18" high. Like driving through the gates of HELL... (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) You're the best man!!! Enjoy your evening!!! Why do I do everything in threes? (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) |
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| Chris914n6 |
Feb 18 2024, 09:03 PM
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#12
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Jackstands are my life. Group: Members Posts: 3,328 Joined: 14-March 03 From: Las Vegas, NV Member No.: 431 Region Association: Southwest Region |
My experience has been for pure gas about 5 years before it turned to varnish.
The e10 we have now not even 6 months. Because it separates it needs to be mixed every week or 2. The ethanol will eat thru non-ethanol rated hoses where it concentrates in low spots. The hose gets soft on the inside then will suddenly crack and spray. The fuel pump may or may not have ethanol safe seals/orings. Fuel rails/injectors seem to do ok as there is no air that far into the system. Might get sticky but fresh gas will clean it, it usually runs fine after 1/2 hour of idling. |
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