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Jan 23rd, 2013
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Old ethanol gas #13395050 01/07/20 12:19 AM
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skeeterguy Offline OP
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How old is too old? Boat hasn't been used for a while and has about 20 gallons of treated ethanol gas that is about 6 months old.

Re: Old ethanol gas [Re: skeeterguy] #13395092 01/07/20 12:59 AM
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machoblanco61 Offline
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Originally Posted by skeeterguy
How old is too old? Boat hasn't been used for a while and has about 20 gallons of treated ethanol gas that is about 6 months old.

Should be fine

Re: Old ethanol gas [Re: skeeterguy] #13395202 01/07/20 02:19 AM
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rb7764 Online Content
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If treated with Stabil or similar, it will be fine.

Re: Old ethanol gas [Re: skeeterguy] #13395383 01/07/20 12:21 PM
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Cast Online Content
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Smell it. When it goes bad it begins to smell like whiskey a little.


Cast


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I have a short attention spa
Re: Old ethanol gas [Re: skeeterguy] #13395479 01/07/20 02:09 PM
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i'd get out as much as possible and burn in your vehicle and start the year off with fresh fuel in the boat


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Re: Old ethanol gas [Re: skeeterguy] #13395543 01/07/20 03:02 PM
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boatman025 Offline
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I would drain the tank shelf life for gas is 6-8 weeks. It want burn as good as fresh and I wouldn't try to put new gas on top of old. That's like you have a half gallon of milk that bad and putting a half gallon of fresh milk on top my question is would you drink it.


Hughes Marine
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Re: Old ethanol gas [Re: boatman025] #13395562 01/07/20 03:28 PM
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bronco71 Online Content
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Originally Posted by boatman025
I would drain the tank shelf life for gas is 6-8 weeks. It want burn as good as fresh and I wouldn't try to put new gas on top of old. That's like you have a half gallon of milk that bad and putting a half gallon of fresh milk on top my question is would you drink it.

Exactly, I would drain it and mix it with fresh gas in my truck.....as long as it isn't premix!


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Re: Old ethanol gas [Re: skeeterguy] #13395732 01/07/20 06:16 PM
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boatman025 Offline
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It hould be ok in truck


Hughes Marine
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Re: Old ethanol gas [Re: Cast] #13395733 01/07/20 06:16 PM
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Originally Posted by Cast
Smell it. When it goes bad it begins to smell like whiskey a little.

That is E85. Problem I have with my current boat is a 95 gallon tank. I run it as low as I dare then start carrying portable containers. I have run a couple of trips last year and this year with the gauge sitting on E. I would really like to know how much is left when I get to E. I run ethanol free in it.


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Re: Old ethanol gas [Re: skeeterguy] #13396673 01/08/20 01:25 PM
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flyingbutcher Offline
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Just put in as much new fuel as you can along with a can of sea foam. You will be fine.

Re: Old ethanol gas [Re: boatman025] #13396691 01/08/20 01:48 PM
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Originally Posted by boatman025
I would drain the tank shelf life for gas is 6-8 weeks. It want burn as good as fresh and I wouldn't try to put new gas on top of old. That's like you have a half gallon of milk that bad and putting a half gallon of fresh milk on top my question is would you drink it.


I ran my boat yesterday for the first time in over 6 months. It started and ran just fine on the "old" gas.


The United States used to be "One Nation Under God". What happened?
Re: Old ethanol gas [Re: skeeterguy] #13396729 01/08/20 02:13 PM
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Samarai Offline
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my boat once sat for over a year as things were happening in life. when it came time to run the boat i just filled it up with new gas. Had about 3/4 of a tank of gas in there. Started it up and just ran it.

Re: Old ethanol gas [Re: skeeterguy] #13397479 01/09/20 01:27 AM
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Alumacraft 14 Offline
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Depends on how it is stored. Full tank, treated, indoor storage you will suffer some octane loss and that is about all. If you are worried burn 5 or more gallons and add fresh gas to it. May be some moisture but nothing a fuel line separator can't handle. EFI can handle this situation better then a Carb motor. So it all depends on the factors. I would say you are good to go.

Last edited by Alumacraft 14; 01/09/20 01:30 AM.
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