Process

I thought I'd research the recycling process and if I learned anything surprising, I'd share it. Oregon Department of Environmental Quality provides info on newspaper, cardboard, glass, tin cans, aluminum and motor oil recycling... something interesting:

"One role for used oil today is to help lighten bunker fuel, the heavy residue left from virgin oil refining. Bunker fuel often is used in ships' boilers, even though it becomes thick enough to be walked on when cold. Without the lighter-weight used motor oil, bunker fuel would hardly flow through the pipes when temperatures drop. Used oil also is burned in asphalt plants to heat the tar used in the asphalt. And it is used in cement and lime kilns to provide heat for driving the chemical reactions necessary to produce cement and lime."