2002 dodge 4.7 Engine sludge

on the 2.7's when the water pump shaft seal fails instead of leaking externally, it leaks into the oil pan. thats where a lot of the horror stories of the 2.7 sprout from. as for the 4.7, they all are known for sludge and condensation buildup. The oil pickup tube is the first to load up with goo, then it starves the rest of the engine, main and rod bearings fail. this has been known to happen even with regular oil changes AND with synthetics and "super razoo" oils. for whatever reason these problems seem to come up (to the average user) as a misfire, intermittent, then the oil pressure gauge will drop off, and come back, intermittently. most pass it off as an electrical or sender issue....most of the time the engines already eaten itself....