You probably already know this, but just in case, dish soap is great for getting grease and oil stains out of clothing. Shampoo also works, but dish soap is usually cheaper.
I keep a bottle of it in my laundry room. It takes salad dressing, pizza grease drips, etc. right out. It even works if you’ve missed a stain and it’s gone through the washer and dryer already.
Happy laundering 🙂