I haven't done a dpf delete because I value my warranty. At this time Dodge and all manufacturers will immediately void your warranty if they suspect you have done anything like that. At the hugh cost of diesel engines I am not prepared to risk it. Maybe later because I know the delete is actually good for the motor. I have never had any codes or problems in 61,000 km. Towing my Landmark is not an issue even in the mountains of BC. There is lots of information on how to run your truck, including a site at Cummins. In a nutshell most people try to run around 1700 - 1900 for the sweet spot. When in the mountains I used the gear shift toggle to manually change gears to keep the engine running in a strong power band, usually never letting it get below 14-1500 rpm's. You should always keep your exhaust brake on no matter what because that helps to keep the turbo clean, ie I have never had any issues. I know that the guys on the Dodge Cummins forum have been doing a lot of dpf and cooler deletes and then seeing up to 5 mpg increase in economy (US). This also keeps the engine much cleaner and enables it to enjoy a long life. Of course the question is that some day this may generate a serious fine for somebody.