dumping used oil down the drain? Probably pistol whipped and fined. BUT if you were a job creator who owns half the gubmint, probably another tax break. http://thinkprogress.org/climate/2013/10/30/2859041/texas-koch-pipeline-spill/ drill here! drill now!
I used it to kill the grass and make a basketball court in my parent's back yard when I was a teenager. Granted we all used to ride in the fog behind the the trucks that were spraying for mosquitos... Ahh good times.
I use a lot of oil to keep my pistons adequately lubed. Nothing is worse than excess friction when your piston is sliding in a cylinder.