So, I noticed the other day (have not been driving my car more than once a week, if that) I started the car, pulled out of the driveway and noticed the black stuff. I feared it was oil, but thankfully it's not. I put some cardboard underneath the car and it only spits this stuff out after the car has not been driven for like a week. So when I sart the car after a week of not driving, this comes out. I felt the cardbpard it does not smell like coolant, nor does it have a coolant feel to it, however the cardboard was kind of spongy where the black soot was, heat of the exhuast? Water? Anyway, car runs fine, no signs of anything wrong, but never noticed this before (FYI just moved into new house with concrete driveway, as well as garage, where this may have been happening before, but car was always on blacktop so maybe I never noticed it? Also I have no exhaust, just open downpipe

 

is it powder? when my car had a exhaust leak it would drip that same black stuff from the leak...i also only drive the car once or twice a week

 

It is kind of powdery, comes right out of downpipe. Maybe just super rich on startup, it is hot as balls out

 

My car throws the same shit out of the exhaust on startup. I'm pretty sure its just a mix of condensation and soot from the fuel. Hahaha bad thing is, the exhaust has like a slight bend in it so it shot all over the side of my garage door and now its covered with this black soot.

 

my last turbo car would spit that stuff out all over the garage floor from the exhaust pipes...it was running a little rich

 

Running rich and cleaning up your DP? Water or fuel if you smell it?

 

Yep looks like soot to me...no issues with e85 doing this so I am happy.

 

I'd say soot too, think of it as giving something back to the environment.

That's kinda nice that e85 doesn't do this. I can tell every spot I've ever parked in the work parking ramp.

 

Mine does it too

 

mine does it too