I’ve got a partial can in my shed which hasn’t been used for 2 years since I hired a lawn service. What to do with old gas? I thought about just setting it beside the street the other day and letting the panicked deal with it. But I didn’t.
Throw it away? If the can is old enough to have been designed the way God intended, it's a keeper... or you can sell it to anyone else with common sense for about $50.2 year old gas should still be good. Pour it into your car and it should be fine mixed in with the rest of the gas. Then you can just throw the empty gas can away, or light it up and watch it explode (be careful with the last part).