9 Answers

Dawn dish  washing soap at a whole lot of elbo grease will do the trick..

If you know of anyone that makes there own bio diesel the left over glycerin makes one heck of a good cleaner.

coca cola, coca cola ohh nd did i mention coca cola ! but it haz 2 b real coke nd u first wash the effected area wit water wait till it dries then apply coke 1.25litre shud do the trick juz dependin on the size ov affected area ! but i hav tried nd tested nd it worked 4 me so if u giv it a go i pretty sure u will hav same luck ! : )

There are a lot of web pages that answer this. Click here to see the list.

You can use oven cleaner spray, it works.

THERE ARE GRANULES YOU CAN BUY ,THAT WILL GET RID OF THEM YOU RUB THEM IN WITH A SHORT HAIRED BROME ,  AND THEN SWEEP THEM UP, 

Spray brake cleaner . It cuts the oil,and evaporates. It's only about $3 or so per can. At any auto parts store. We like it so much we buy by ten gal. can. And use in refillable aerosol sprayer.
(This is one of the answers from the site Colleen is referring you)

Saw dust soaks up the oil pretty well and is easy to shovel away.  Then use the cleaner of your choice.  (my thought) 

I have tried everything. Nothing works. Reseal the driveway, relatively cheap. My driveway is 200x12. Cost $100.00 and about three hours.

Use a soap that is environmentally friendly and lots of elbow grease.....