we always dumped it in with our waste oil....
For the poster asking about bad gas, unless it has water in it do like carnuck says and add it in in small amounts to something else.
I drain my boats tanks every spring and add 3 gallons of it to my truck when it has at least 3/4 of a tank and have had no problems doing that in 15 years.
We actually get paid for our waste oil when it gets picked up so any dropped off to us would be a benefit. It may be different in other states.
Currently own 93 XJ 33's on 4" lift....01 XJ stock,will replace my 93 after mods are done..... 1994 ZJ V8, BB w/31's........99 XJ stock....97 XJ 2wd 5 spd stock.... and just p/u a 98 XJ 4wd/5 spd and a 01 XJ