[Alerosaint]

Im wondering does anybody know why I have all this carbon on my muffler. Its so thick...I know I have an 4 year old high mileage engine(148k) but is this normal? And in the mornings when i start her a lil puff of white smoke comes out...just a lil and thats it. Kinda like the seafoam smoke color. Speaking of that I used seafoam on my car about a month a half ago and is smoked out pretty good, but what else could cause this? Could it be the cat?? Im looking to purchase a new one (I put my thoughts of that in this thread) Also no lights or warnings.