The best sidewalk oil stain cleaner is baking soda and vinegar. I found this amazing combination that removes tough oil stains and makes the sidewalk look new.
Pour vinegar over the stained area and sprinkle baking soda. Let the mixture fizz and bubble for a few minutes to work its magic. To remove residue, brush or broom the area. Finish with pressure washer water for an unbeatable clean. This novel method will clean sidewalks quickly.