well, it is a dodge, and im assuming its the 4.7, as those ALWAYS fuck up without religious oil changes. Really, unless you take the thing apart piece by piece, its going to have bad sludge build up. Best thing to do is do what they say or trade it in. I tell everyone who buys the 4.7 or 5.7 hemi, DO YOUR OIL CHANGES RELIGIOUSLY, or this happens.