This is new oil, btw. Daughter let a 5qt jug of oil tip over and drain out on my driveway. I didn't notice it till the next morning. I don't have a very strong pressure washer, but that plus dish soap doing do much. It's still a darker color spot than the surrounding concrete.
Do I just need a stronger pressure washer? Other cleaning agent?
Do I just need a stronger pressure washer? Other cleaning agent?