I've got about 15 gallons of 1-1/2 year old gas in my boat. What do I do with it? I want it all gone.

paint thinner/hand cleaner

or to clean about anything

Put it in your truck a few gallons at a time. I would put it in 3 five gallon jugs and add 5 gallons everytime I filled up.

Anywhere I can dispose of it? Legally????

just dump it in the lake, that's pretty much what my boat does.. jk

Lawn mower or any 4 cycle engine...a little at a time.

Or you could become a pyromaniac...

pizz a lot of fire aints off

you could dispose it at my place, or you could use it in your
lawn mower.

Lawn mower and add to your truck 1 or 2 gallon each time.
Work very good for fire aints

Lawn mower and add some sta-bil to it. If not put it in the neighborhood burn out champions car when he's not looking.

Check and see if your city has an Environmental Collection Center. Fort Worth has one and they accept all type of paints, acids, chemicals,oils etc... Drove by the other day and they were helping someone pump the gas out of his boat into a 55 gal. drum for disposal.