I checked out our local recycling center at the landfill and asked how/where disposed waste gets routed. The curbside recycle is for general post consumer stuff, (aluminum cans, newspaper, cereal boxes, plastic bottles etc.) no hazardous items taken. All of those things can be disposed of/recycled at the dump. Used oil goes into a large tank that goes to a reclamation center. Most of its contents end up as fuel oil for heating. Seperate containers to throw all the used oil bottles in. This gets sent to the same reclamation center which then "cooks" the bottles and dreg oil from the used oil tank into a slurry. This heated goo is then sent to the local asphalt facilities that mix it into foundation layers for roadways. Curiously, the "slurry" can't be mixed into a "top" coat of asphalt for concern that it could migrate into groundwater when it rains. They feel its "contained" enough in the bedding layers though. Still, pretty conscientous if you ask me. I'm happy to go along with the program.