Quote Originally Posted by JoeyKazez
hmm does bleach really work or is that going to leave a big white mark instead of an oil stain? im gonna buy some purple power.
it'll be white after using bleach unless you have perfectly fresh concrete with no discoloration yet.

Kitty litter/oil dry will not prevent stains in any shape or form unless it's used within seconds to minutes after the spill or is on extremely well sealed concrete...in which the sealant is preventing the stain, not the kitty litter.

Purple Power or Simple Green should break it down enough then use high pressure to rinse. If you're really serious about it i'd get a pot of boiling water and pour on after soaking it in a degreaser...then the highest pressure rinse you can do.