Old fuel disposal or use ?

You can test some of the old fuel in something else.
AS far as old fuel I dilute it with new fuel and use it up
I had some 8 year old gas and was,unsure if it had Sta_Bil. Even still past what Sta_Bil does but was good to go in lawn mower.
I had some 110 with lead race gas (VP) I was also worried about but was,good to go