Hey all! Don't know if this happens to everyones Acadias. But do all of your Acadias collect carbon on the tail pipes pretty quick? I cleaned the car recently since the rain has died down here in So Cal. In a matter of just days.. hmmm guessing 4 - 5.. The tail pipes were covered in black gunk.. is this normal?? Also in the AM or evening when i start the Acadia. there is a significant amount of smoke coming out the pipes. It's not black or blue.. It's white and dissipates pretty quick! But there is more smoke coming out of this XUV than any other vehicles i've owned. Cars, SUV, V8 Trucks etc.