I think that they all currently use the Re-Gen technology to burn off the soot from the DPF. In order to meet the emissions standards, they switched to a cleaner fuel (ULSD). Manufacturers adopted a particulate filter that will burn itself off about every 3K miles. I understand that the engines run rough and the exhaust gets very hot during this evolution. That all started with model year 07. If you don't want to put up with this, get an 06 or earlier diesel.
If it ain\'t accurate at long distance, then the fact that it is flat shooting is meaningless.
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