I've found a solution to this problem!
You will need:
- Flour/Corn Flour
- A heavy book
2. Completely cover the oil stain on top of the paper with a good amount of the flour.
3. Place a book/a heavy object on top of the flour.
4. Leave over night, to allow the oil to be soaked up.
You might need to leave the flour for longer depending on how bad the oil stain is.