Motography: Prints with recycled motor oil

I first began experimenting with recycled motor oil in the early 1990s. The choice arose out of an insight I had as a result of my car's leaking oil pan. Over time I gained more control over the medium until I felt I'd satisfied my curiosity as to its potential as an art material. Along the way I used it to paint/draw directly on the paper and also developed a  process of monoprinting.