Oil Man is a Robot Master created by Dr. Light and Dr. Wily. By the time of the unveiling of the six Robot Masters in Titanium Park, Oil Man and Time Man were still in experimental stages and were left in Dr. Wily's care. Wily completed them and they helped him escape from the prison.
His ability is Oil Slider. He kidnapped Roll in his debut issue. His personality is a black stereotype. He and Time Man do not usually get along very well. He was defeated by Fire Man.
- In his game counter-part, he had large lips that could be considered a black stereo-type. Archie fixed this with covering his lips with his scarf.
- He was in one of the Off-Panel comics with a mad Proto-Man because of his scarf.