id try a small bottle of acetone. i spilled oil on my seat and it took it out no problem with a brush and paper towels. and didnt mess up the gray color of my seats.... but make sure u vent car good cause its strong vapors.

 

Try "stain extinguisher" by chem dry. It's kind of like dry cleaning solvent. If you can get your hands on dry cleaning solvent "Perchlorate" use that.