dont use a jet washer on tarmac it will loosen it up and youll have a pothole, washing powder afgain or Swarfega oil and grease remover, its water based pour some on and leave overnight, then gentle scrub with water and rinse.
swarfega oil and grease remover sold in b and q toolstation and screwfix
I must admit that I really don’t think I could be bothered with removing an oil stain rom a drive. As above – it’ll fade with time.
However, if you really feel you need to remove it, Dave’s Insanity Sauce claims on the label that it will remove oil stains. And if it doesn’t, you can use the remaining contents of the bottle to spice up your chillies.
Problem with oil stains (esp from Diesel engines) isn’t the oil, it’s the soot that it carries into the fabric of the material. You can degrease the oil but it’ll leave the carbon behind. I know this from owning a diesel Land Rover and a concrete drive. I wondered in the end whether it would be better just to brush used oil thinly over the whole drive…