SAEDNEWS: Treating an oil stain before washing can prevent it from setting deeper into the fabric. A simple combination of absorbent powder and dishwashing liquid can help loosen fresh grease effectively.
According to SAEDNEWS, oil stains are easier to deal with when they are treated before the garment goes into the washing machine. Because oil does not mix well with water, simply washing the fabric may not remove the stain completely. Acting promptly can reduce the chance of the mark becoming more difficult to remove.
Follow these steps before washing the garment:
Blot excess oil: Gently press the stained area with a clean paper towel or cloth to absorb as much oil as possible. Avoid rubbing, which can spread the stain further into the fibers.
Apply an absorbent powder: Cover the stain with a small amount of baking soda or cornstarch and leave it for several minutes. The powder can help absorb some of the surface oil. Brush or shake it off gently afterward.
Use dishwashing liquid: Apply a small amount of liquid dish soap directly to the remaining stain. Gently work it into the fabric with your fingers or a soft brush, taking care not to damage delicate fibers.
Rinse and check: Rinse the treated area with water according to the garment's care instructions. Check the fabric before washing it. If the stain is still visible, repeat the treatment rather than immediately drying the garment.
Wash as directed: Place the garment in the washing machine and use the warmest water temperature permitted by its care label. After washing, inspect the stain before using a dryer.

A few habits can make an oil stain harder to remove:
Do not rub the stain aggressively.
Do not put the garment in the dryer while the stain is still visible.
Do not use very hot water if the care label does not permit it.
Do not skip the fabric-care instructions, especially with delicate or specially treated materials.
For older or stubborn stains, more than one pre-treatment may be necessary. Always test a cleaning product on an inconspicuous area first, particularly when the fabric is delicate or brightly colored.