GarmentCare Guide 
Oil-Stain Care for Cotton Clothing
An oily patch needs more than a decision to wash the garment again. Remove excess without spreading it, check the cotton item's full care instructions, and choose a compatible pretreatment. The type of oil and the presence of other fibers or finishes still matter. Inspect the result before adding heat that could make remaining residue harder to remove.
Blot the excess first
Homes & Gardens discusses addressing oil stains before relying on the washing machine alone. Its dish-soap approach begins with removing as much excess as possible using clean absorbent material. The underlying idea is to reduce the residue and apply a compatible grease-targeting treatment rather than simply hoping a repeat wash will solve everything.
Keep the fabric limits in view
The source recommends checking the stain and repeating an appropriate treatment before laundering within the material's limits. The particular oil and garment still matter. A vigorous treatment discussed for a robust textile should not be transferred automatically to a delicate piece, and the care label remains the guide for the final wash.
