Should i be worried?

 

My other turbo car has done this since it was built. Never worried about it.

Did it start all of a sudden or did something change recently?

 

It's probably just condensation being blown out the exhaust now that it's cooler out, no worries.

 

its usually condensation. sometimes, it means you have a valve guide/seal leak. that's usuallly not the case though.

 

K, thats good to hear. i dont really know how long its done that, i usually park on the blacktop not the garage. my dad has the garage occupied with his mustang.

 

when mine would do that, the cure was always a new block

 

^explain more. I get this a bit, is it rings? I was thinking it had to be valve seals/guides really. The idea is oil leaks from the head onto the valve when you park it. Start it up in the morning and the port for the exhaust will shoot the oil through the exhaust, cat picks some up and the rest moves along.

 

If it was condensation wouldn't it look a little more watered down?

If my car sits for a long time that will happen, but it doesn't look nearly that dark.

 

it looks like carbon buildup. 171,xxx miles i expect theres a good bit of it on the inside. the last 10-15k miles have been boosted.