Just jumping in to this thread to add my 2013 Ram 1500 5.7L VVT/MDS 4WD to the list of trucks experiencing Lifter/Cam Failure.
234 xxx KM (146k miles).
Truck showing about 140 hours idle time and somewhere over 4k hours drive time, but I know thats wrong as I recall having 100+ hours idle time when the truck was only a year or two old. I haven't had it running enough yet to prove whether it has stopped recording idle hours.
Failed lifters were intake on 6 and exhaust on 4. Yes, both MDS cylinders but as we know any can fail.
I have always used 5w-20 synthetic for the life of the truck, but a few oil changes were probably a little long in the tooth, but most in the 5-10k KM range for changes.
Maybe another interesting/related fact is that i have an 8 speed trans, and am not heavy on the gas regularly, these factors perhaps l
Sorry to hear C hris. Any idea what your cold and warm idle speed was running?