Once oil stains have had time to deeply penetrate the driveway’s surface, they can be tough to remove. For small stains, try covering the stain with a mixture of water and dish soap or laundry detergent. Wait several minutes, then scrub the area with a wire brush. Rinse the area with a hose or pressure washer. Repeat from the beginning a few times if the stain persists. For larger or older stains, try the same process using commercial degreaser instead of soapy water. Make sure to wear the proper protective gear including safety goggles and gloves when handling cleaning chemicals. If the stain still remains, you can always try the unorthodox method of pouring cola over the stain and leaving it overnight! It sounds crazy, but some people insist that it works.