I usually just take the "touch it" approach. You can get a better idea of the true color with it on your finger - and you can get a whiff of it too (only helpful if you know what smells like what).
After my wife blew her right side tires on the curb a few weeks back, under her car (where she parked it right after) I saw a puddle, but after doing that test, determined it just to be water. It was black asphalt (quite new) so it looked like oil at first.
After my wife blew her right side tires on the curb a few weeks back, under her car (where she parked it right after) I saw a puddle, but after doing that test, determined it just to be water. It was black asphalt (quite new) so it looked like oil at first.
