I change oil on both of my vehicles at the same time. (Every 6 months... 7 quarts, and 6 quarts for both). I dump it into a nice heavy 5 gallon plastic container that bulk Simple Green came in. When I'm done cleaning up, I take it to my local Auto Zone and dump it into their big, (500+ gallon), waste oil container in the back. They know me and never question what I'm doing. I don't know where that oil goes, or who dumped what into that tank before I got there. But it makes me think, and understand why the only thing I would ever buy, "re-refined motor oil" for, would be to give my ex wife an enema.
