I just moved in a house and found some large oil
spots on the driveway and these oil spots was
stained for over a year. I've tried to get some stuff (oil/grease removal) in Home Depo to get rid
these oil spots but it did not work.I think that
these oil spots was on the concrete for a longtime
what mean these oil spots never clean up ? is this
right Mr Bob ?
Would you please let me know any way i can clean up these oil spots.