My DD 2011 F250 6.2L has definite soot buildup on the tailpipe (I have the chrome package, so it's got a chrome tip) and the RR corner of the back bumper is constantly discolored from the exhaust........I figured it was because the exhaust exits at an angle, and that the bumper was collecting more road grime due to the condensation/etc from the exhaust.........but maybe not. I'll take a pic later today and upload it. I am 99% positive I've seen a SLIGHT puff of black smoke a couple of times on hard take-off, (ie, slight being the size of a basketball, maybe, and I've only noticed it a couple of times).

Does anyone else have this going on??

Truck has 8800 miles on it, daily driven about 10 miles each way to work, and I'm not easy on it It is 100% stock, no tuner or intake.