I have a friend who owns one of those "quick change oil store" and over coffee today, he informed me that Pennzoil oil filters were now o. k. to run on the 2003 CTD's. I told him "no way", but he insisted that he had called the Pennz rep and was told it was approved by Cummins last month. I told him they would do anything to sell a filter. Would someone please inform me if this is true, and if it is, where can I go on the Web and get confirmation?