My first thought was the engine running rich . Then I noticed the "Turbo" emblem. Is it possible the turbine shaft is leaking oil ?

 

Add a large bottle of Techron to the fuel every oil change. It helps keep the soot down and your engine clean!
Also use CRC cleaner (a spray) in the intake, ahead of the throttle body, every 25-30 K miles

 

Its the direct injection. All DI engines leave soot everywhere! DI causes more issues that what its worth, in my humble opinion.....

 

Agreed, DI helps with emissions, however has limitations with power, coking the valves, and the soot

 

Also, backward airflow can deposit road film all over the back, a lot of cars have some of this effect. Or also could be a diff blowing oil out the vent hole, or leaking out the bottom, have you checked your diff for leaks?

 

LOL
The 2,0 makes huge reliable power for a 2 liter.

Its soot. The engine uses fuel to control combustion chamber temps. So there is going to be soot

My 68 GTO would paint the entire rear end of the car white after the 800 mile run from Ft Ord to Washington to see me now wife. It was lead oxide

No big deal. Just wash it off

RTE

 

Yes, we collected the lead oxide and put it on toast!!😉

 

LOL Why do I believe you?

RTE

 

Cuz you did it too!!

 

After diff vent rework,dealer replaced diff under warranty

 

The first mention of soot came in 2006 when the cars initially were delivered. Its endimic in how the motor is supplied fuel. Its not a leak. Its not rich. Its how they run

RTE

 

Might be a cracked CV joint, in which case it should also feel sticky/greasy and you would likely find it on one of your wheels as well.