You used to be able to add almost pure alcohol to it, which would absorbe the water and allow you to burn it off by running it. Nowdays it's hard to find. I bought the cheapest large gas cans I could find, and then took it to the garbage recycler on toxic clean up day. Some people use it to help start their brush piles on burn days(during the winter). I still have a five gallon container of bad gas from the tank that came with my truck! It is a pain finding anyone who will recyclie it these days. Now in my grandma's time, they just poured it into the ground without a thought! More of a problem today!