Didn’t matter road conditions, RAM built the truck with multiple recalls. Now they have to add a DPF Sensor and re-program truck ( 4th ) recall. I’m constantly getting a dpf plugged reading of 50%, idles rough as hell and hard starting. My toy hauler is about 8,800 pounds empty, I can tow it on flat ground at 50 mph or 65 - 75 I get the same 8.5 mph. The truck now has 23,400 miles on it. First oil change was at 5,200 miles, second oil change I did at 7,500 ( dealership switched from 5w-40 to 10w-40 at 5,200 miles. I went back to 5w-40 at 7,500 miles. Did third oil change at 17,500 miles again with 5w-40, I’m using Shell Rotella T6 full synthetic with Cummins Fleetgard oil filter and Mopar oem fuel filters. Each oil change I’ve changed all filters. Truck seems to be very sensitive to work, i.e. swapped crap Firestone tires for BF GOODRICH ALL TERRAINS same size as originals and lost 1.5 mpg’s and when ac is on I lose another 2mps. This thing seems gutless