If I were you, I'd use dish liquid 1st and try to work it out before washing. You already have this at home. Do NOT put it into the dryer if it doesn't come out (of course you wouldn't, but..). If that didn't work, I'd use Simple Green. I can guarantee it will come out with that if the stain hasn't been set. Many mechanics wives use it for their husband's clothing. You can find it at Western Auto & Sam's Club used to carry it.