I use the Purple Stuff, I don't what it's called but you can get it a homedepot and most parts stores. It's a good degreaser but be careful it very slippery...plus a 3500psi cleaner would also be good.
I bought a big gallon jug of something at Autozone that did the trick nice, got a spray thing (techie term) for it; spray on, hose off, watch the oil disappear along w/ the neighbor's grass /forums/images/icons/wink.gif
'72 Mach 1 || '90 Talon TSi AWD
"Thats not a leak, my car's marking its territory!"
"If you've done it, it ain't braggin'." -Roy Rogers