Can granular absorbents absorb oil stains on the concrete?
If the stain is fresh and moist, there is a chance that absorbent granules can remove it and make it less noticeable, but this might not completely remove old stains. If the stain has already dried up, use a degreaser to liquefy it so that it will be easier to clean up with sweep-offs. However, you might need to repeat these steps or use an entirely different stain remover to achieve the results that you want.