Is it possible to completely eliminate all exaust smoke? Did they smoke any when new? Mine smokes some during acceleration and small puffs when going down the road or highway. It never smokes enough where I can see it in my rear view mirror. I can see it at night if a car is behind me. I only know it smokes some because I get someone to drive it and I follow from behind. I guess am wondering if I am trying for the impossible or should I keep trying until I get no smoke. I have never actually seen a non smoking w115 or w123 before. I have looked on YouTube but no one takes pictures of their exhaust going down the road. Thanks.