The ones who know something aren't talking. The rest of us have expounded on every guess we can think of. As Wer said a while ago, time to wait and see. I am optimistic because I see so much promise in particulate reduction, less use of def fluid and better fuel economy. Hoping the government test verifies all three of those significantly. Significantly enough for fresh money to come into this and take it to the marketplace. In the meantime, my best to all, Jim