In would not use the gas in the tank.If it didn’t smell too stale once pumped out,I might use it diluted in my truck…Or,I go thru 3 or 4 gallons of “wash gas” every year,I could give away twice that to someone I know for that same purpose.
I recently saw a guy at a boat launch (about September 1st) trying to start his 90 horse. I could smell bad gas before I even walked onto the pier….He said it was the first time starting the motor this year but he was confident he’d get’er going.
It did choke into a start – then stalled,then started,then coughed out… and I noticed he put the boat back on the trailer without ever really getting it running. It took maybe 45 minutes to convince him of what I suspected just by smelling old,old gas.