I had a massive (10 to 15 gallons-tossed out by vandals) used oil
spill on my fresh blacktop couple of years ago. I used "Oil Eater"
which is a very good oil cleaning agent, but is probably unavailable
at retail. A good substitute would be Castrol Super Clean or the
"Purple" stuff. Dawn dish detergent probably works well also. Best
bet is to stiff broom scrub it or better yet, use a pressure washer
to deep clean. I used both. A heavy rinse is necessary to get all
the emulsified oil off the driveway or it will look worse than before
the oil spill.
Took a good effort, but looked good as new the next day.
Jeff Johnson
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