It’s been about three-and-a-half weeks now since I filled up a couple 5-gallon containers in anticipation of power outages during a winter storm. Since I’m a dumb dumb, I did not add stabilizer at the time, but I do have some Seafoam stabilizer on hand.

I understand fuel degrades over time and running degraded fuel can damage engine parts. Should I pour the fuel into my vehicle or will that gum up my car’s engine? Is it still worth adding stabilizer today so that I can continue to store it in my garage for a rainy day? The only other responsible alternative I can think of is taking it to a hazardous disposal site in my county. It’s octane rating 87, I believe it also has ethanol, in case that makes any difference.

  • Blue_Morpho@lemmy.world
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    1 day ago

    I’m guessing those tanks have been sealed from when you filled them?

    Gas goes bad primarily from absorbing water from the air, oxidation, and evaporation. Since the tanks were kept closed, the gas will last for years.

    Gas cans that are used frequently need stabilizer because every time you pour a little to fill a lawnmower, fresh air gets in to replace the volume poured out.

    • yo_scottie_oh@lemmy.mlOP
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      1 day ago

      Correct, they’ve been sealed since I filled them three weeks ago. Thanks for explaining a little more around how gas degrades.

    • fizzle@quokk.au
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      24 hours ago

      I dont know anything about this but in (yes fictional) apocalypse novels the gas in car tanks always goes bad after several months.

      • hereiamagain@sh.itjust.works
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        11 hours ago

        Nah, it might be a little less spicy after a year, but still plenty useful, even for years it can remain functional. Months is nothing.

        Source: grew up on a farm. Own gas powered yard tools.