Concrete is such a hard and durable surface, we tend to forget just how porous it really is. It's because of all those little holes that driveway's easily hang onto oil stains. Oil stains leave a dark and noticeable mark on a concrete surface that requires a little creative thinking to remove. Requiring more time than actual effort, eliminating these unsightly old stains from the driveway is a fairly simple task when you have the right materials for the job.
Pour fresh clay kitty litter over the stain, spreading it around with a broom to make sure that the entire stain is covered.
Allow the kitty litter to remain in the stain for 24 hours. If the weather isn't cooperating, cover the area with a large plastic bag and tape or weigh down the edges with something heavy.
Sweep away the kitty litter with a broom and dustpan discarding it in a loosely tied plastic bag and setting it away from the house as the fumes are flammable.
Squeeze a grease-cutting dish soap over the remaining stain.
Dampen the area with hot water and scrub with a coarse bristle brush or push broom.
Rinse the area off with the hose and inspect the area.
Cover any remaining stain with oven cleaner.
Cover the area with a plastic bag and tape down the edges.
Allow the oven cleaner to remain on the residual stain overnight.
Rinse the area off with the hose in the morning.