Will pressure washing remove an oil stain?
Pressure alone may not remove absorbed oil and can spread contamination.
Oil can penetrate porous surfaces, so results depend on material, age of the stain and previous treatments. Cleaning can improve many stains but complete removal is not always realistic.
Fresh spills are generally easier to manage than stains that have soaked in for a long time.
This page is general guidance, not a diagnosis. If the issue involves immediate danger, active water near electrics, fire, gas, structural instability, unsafe working at height or another urgent safety risk, use an appropriately qualified professional or emergency service rather than relying on online advice.
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Pressure alone may not remove absorbed oil and can spread contamination.
Sometimes they improve substantially, but permanent shadowing can remain on porous materials.
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