well it's not oil obviously... like the others said, it looks like plastic. What do the drips smell like?

Definitely melted plastic. I had this problem a couple months ago with a plastic grocery bag that got hung up underneath the car and melted against the exhaust pipes. You might not notice the smell from in the cabin, or even outside if most of the plastic is already melted, and is just reheating and dripping off.

Same thing happened to me.

Yea, your right no other other fluid would harden like that afterwards, thanks for the safety tips =]

Like nothing. Like that helped lol haha

Im will take another look, that horrible, there is no foul smell though... So maybe its something else, hopefully nothing major

If he had a bag he would have a bad smell. Right before I was suppose to go to Atco raceway with a few friends I started to get his burning plastic smell coming from the Z. I was so worried it was something that was going to stop me from hitting the track. I searched and searched could not find anything. Untill one day I smelled it really bad after getting on her a little, I pulled over and got under the car and saw a melted plastic bag my FI exhaust. I was pissed and happy at the same time LOL

Almost looks like some kind of silicone sealant.

Yeah that's my thought. Looks like the high-temp rtv.

Where under the car is it leaking?

Take a good look in the engine bay and under the car as well. Make sure you do this when the car is completely cool. Use a flashlight and look for more of this goop, or debris that is stuck in there. Did this just happen one day or does it continue to happen? You say it is hard now, but did you ever see it when it was soft?

Imagine where the intakes are, underneath the car of course, that is where the leaks were on the floor, left and right. I looked again this morning, i cant seem to find anything, no smells, no engine lights no nothing. hm...

No idea when it happend, its not ALOT of it on the floor, but it enough to notice something aint right. Ive never seen it fresh and gooey.

There is no way anything slightly dripping from the engine will be visible on the ground from the front bumper all the way back to about the front edge of the doors. The under tray covers that whole area. The only way to get a fluid leak in that area is to have a big one (lots of oil or coolant) that actually fills the tray and then seeps through the holes in it.

Either your under tray or something in the wheel well is melting, something is dripping from further back than the intake area, or you have a ton of that melted crap caught by the under tray and only a bit got through to the ground.

You can certainly melt the dust boots around the brake caliper pistons, but they usually vaporize rather than drip.

Are you sure this wasn't some type of plastic flash material that just dropped to the floor? Perhaps you ran over something on the road and this was just leftover debris? If you never saw this in a wet/soft state then I would question the origin. Are you sure it couldn't be from something else in the garage?

Do you have kids? ;)