I am been visiting this site for some time and decided to join today to share some information just e-mailed to me from Cummins. I joined a Cummins mailing awhile back list and today they sent out a article talking about the Operating Tips for the DPF. This article finally sheds some more light on the DPF warning messages we may see on our overhead console. I found this article useful and wanted to share it with anyone who may be interested: Turbo Diesel