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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.
Should be fine on more modern cars (ie. Everything with fuel injection, newer than 1990)
I run gas that's probably 1-2y old in my pickup and never had any issues.
Just beware that ethanol might hurt rubber lines if you have them. So best to mix it with some new gas over time