How to remove oil stains from concrete:
Removing oil stains from concrete can be one of the most frustrating experiences. Perhaps the worst is when it has soaked into the concrete. You apply the cleaners as described here but the oil stains keep coming back. The first and most effective thing you can do is clean an oil stain ASAP. The longer you let the oil sit, the harder it is going to be to clean up.
For fresh oil spills any degreaser, tide or even Kitty litter works very well. Once it has soaked into the concrete, we suggest Pour N Restore to clean it. If the stain is very old and somewhat dried up at the top, we would suggest using a degreaser first.
If you have a vehicle that leaks we would suggest an absorbent mat such as Oil-Dri to keep future spills from soaking in.