Oil stains on concrete floors require practical solutions that are both effective and easy to apply. Knowing how to remove old oil stains from concrete can help you tackle stubborn stains. Begin by blotting up any excess oil with absorbent materials. Then, apply a degreaser and scrub the stain with a stiff brush to break up the oils. For older stains, consider using a poultice or enzyme-based cleaner. After cleaning, rinse the area thoroughly and apply a concrete sealer for long-lasting protection. This combination of cleaning and sealing ensures your concrete floor remains clean and durable.