In my small sample of a few hundred 2016 and 2018 Ram Promaster 2500s with the 3.6, I can’t say I’d want one. There isn’t a day that goes by that I’m not replacing an oil cooler, radiator, fan, coolant bottle, motor mounts, water pump, thermostat and/or housing and crossover, etc etc. Our higher mileage ones are usually in better shape, but I’m doing all this work on them anywhere from 10k-30k miles. I think the highest mileage 3.6s we have may be in the 60k range.
Many of the oil cooler jobs come in with faults for low oil pressure, variable cam timing disabled, etc. I typically ignore them and simply fix the leak (they’re fleet vehicles and drivers don’t complain about anything as long as it goes and stops and turns). We’ll see how many come back with the faults present again after leaks are fixed and actually need oil pumps. I feel like a few may.
They go through cams / lifters / rockers as well. I’ve yet to do any of those repairs, and don’t really plan to. I’ll let the shop sub that out as we’re really only equipped to do basic maintenance.