Getting oil stain out of clothes is beating me

Keep it out of the dryer until it's gone, heat sets oil for good. Grease cutting washing up liquid is what does it. Rub it neat into the stain, leave it 10 to 15 minutes, then wash on the hottest temperature the label allows. If the stain is older, cover it in cornflour or baby powder first and leave it overnight to pull the oil out, brush that off, then the washing up liquid. Sometimes it takes two rounds, so check it before drying each time.