Have you heard of any engine sludge problems in 2016 Nissan Pathfinders?
Nope. Doesn’t matter, either. If you want to avoid sludge, change your oil sooner than the manufacturer recommends without fail. Use very good quality oil and you won’t have a sludge problem.
Once again a question that really does not ask a question. Does the person have a 2016 Pathfinder , are they thinking about buying a used one or has someone told them they have a sludge problem that needs attention ?