Had an 01 Durango with the 4.7. I bought it with 170k. It ran buttery smooth, do I thought I had gotten lucky. That thought went out the window about a month later when my oil pressure dropped to zero at idle. Come to find out it burned a ton of oil. We drove it from Phoenix to LA and back (300ish miles one way) and went through 4 quarts of oil. We traded it in on a 16 Durango and got $50 for it lol. Only traded it in because I got severely injured and couldn't replace an engine.