Driveway stains

[96Firebird]

I was an idiot and let some power steering leaks stain into my driveway, so now I have spots in various locations of power steering stains. It is an asphalt driveway, and the stains have been there for months. With the lack of rain we've been having, none of it has been washed away.

I've got the power steering leak fixed, and now want to get rid of the stains. I've read Tide detergent works if used right away, same with kitty litter. Can these be used months later? Would a power washer help? Or should I just seal over them?

 

[satyajitmenon]

Power washer helps, as does kitty litter (although only soon after the spill to soak up quickly).

I've seen impressive results from carb cleaner (or was it brake cleaner?) on old oil stains on a driveway. Not environmentally friendly if you wash it away and it gets into the water system, but effective.

Also, this thread might help a bit.

https://forums.anandtech.com/threads/driveway-oil-stains-how-to-remove.257247/

 

[MDE]

I used powdered laundry detergent for oil stains on a concrete driveway and it definitely helped.