I just purchased a 2019 Ram 3500 Cummins, a few weeks back. Everytime I go to the diesel pump, it's a 30 minute fill. So, my wife and I took a trip to Denver to pickup an RV yesterday. We have a fleet fuel card for discount fuel at most truck stops. I could not fill up properly at the high flow pumps. I either had to pump in pennies at a time, or have diesel fuel and foam blow back out at me and on the ground. As well all know, drops of wasted diesel fuel is like gold these days. My wife told me she wants to go trade in the truck, as it was so frustrating. We tried different angles and approaches. Nothing worked. This is our 4th Ram, and what a huge disappointment. We travel full time, so utilizing the high flow pumps is usually a great time saver. This truck has caused the opposite result. I wish there was a solution, but my wife is pushing to go look at different brands at this point.