Rice Hull ash....
They use Rice Hull Ash at New England Dragway to mop up spills..they say nothing works better...wonder if its NHRA approved?
I have no idea where to get it,other than the "Grease Sweep" stuff you might find at a maintenence supply place...it'd take forever to de-hull enough grains of Uncle Bens rice, and burn them to get the ash!..

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I've gotten by with kitty litter,speedi-dri,etc,ground in with a brick and rinsed after..I tried pouring gasoline on a gear oil stain and lit it with a lighter..the asphalt got so hot it melted,and the stain was still visible,though the wet oil did dissapear..make tons of white horrid smelling smoke,took 15 minutes before it went out!..I also used a 2500 psi pressure washer once,and carved a nice hole right down to the crushed stone base!..
Back in 1986,my 72 K5 peuked gear oil and motor oil all over the driveway..my dad always freaked out about oil spills on the asphalt..I tried a lot of detergents,and cleaners made by "Gunk" for cleaning driveways(kerosene if you ask me!) and even "TSP" (trisodium phosphate) and other cleaners..nothing really did any better than kitty litter and a brick did..
However...now,20 years later,I'm hard pressed to find even a TRACE of the forementioned oil spots,that WERE quite bad!...mother nature,rain,snow,and sand worked miracles!..all I had to do was NOTHING...and wait!...
