if its faded tarmac you could always give it a light pressure wash to give it a clean and then use the tarmac restorer paint to restore it back to new colourhttp://www.smartseal.co.uk/tarmac-sealer-restorer/tarmac-restorer.htm
klean mate seem to agree with you on that dont do mant drive cleans for that reason seem to be stuck with this did put a big price to it seeming to put them off didnt work
aj if u need hand send me an email done a few drives never had a prob getting rid of oil marks
Lets have the method out in the open then. I`ve read every post on this forum and others,websites relating to pressure washing,spoken with experienced pressure washer users and bad oil stains are mostly sorted by replacing the surface they are on if the customer wants the stain gone.