If you have spilled oil or grease on your garage or basement floor, even on the walkway outside you home. You will want to remove them quickly as spilled oil or grease can leave dark stains on your concrete.
Clean up mess as soon as it happens, just pour some kitty litter over the area and it will soak up all the grease or oil fast! No staining! Just sweep it away.
You can achieve these same great results using salt poured over the oil or grease that you have spilled on the concrete.
Coca-cola is also great at removing oil and grease. Simply pour over the marks and leave over night.