Hi guys I'm new here, I'm having a problem with my G6, it has the 3.5l v6 in it. Today it started smoking white from the exaust and you can smell oil burning bad. I think my buddy over filled it, could that cause it to smoke white? It does have 285,xxx miles on it.... Also have a oil leak coming from somewhere around the oil filter but can't seem to find it either. Any help would be much appreciated. Thanks in advance.