Many people who deliver rv's for a living are retirees working on a very low profit margin. Most of the vehicles that they use in the business are purchased used to keep costs as low as possible, especially with the high cost of fuel. The Cummins engines are reliable powerplants, and when combined with the lower purchase price of the Dodge truck, is probably the reason more are seen at the manufacturers lots. If you ever see these couples delivering to dealers, stop and have a chat with them, you will find it quite interesting. The new Dodges are nice trucks. The Italians have done a very good job turning the company and products around.