I'm thinking about getting a new leftover 2013 Ram 3500 DRW 6.7 but I was reading on the TDR about some of the trucks having short oil change intervals. One poster had to change oil 4 times in 10,000 ...
My 12 has had less than 1% fuel dilution each time I have had Blackstone test the oil. I do drive it like it was intended to be driven. No short trips along with towing. Oil changes have been near 7,500 miles this last time just over 6K but no towing.
The 13's and newer will not fuel dilution problems at all since the exhaust treatment is down stream of the engine.