[Rivergoer]

I put my finger in it this morning ....it looked black a little sticky....but then again....I had a old car that leaked oil there for 2 years and never cleaned the concrete.....****....not sure...I wonder if u put water in a old oil stained concrete...will it look like the car has been leaking?

if the car was leaking oil or coolant...would any warning lights come on?

Put a piece of cardboard down when you park for the night. CEL (warning lights) won't necessarily come on.

Check back after the cardboard thing, might help isolate your leaking fluid from road gunk already present on your parking spot.