Normal
Throughout pretty much automotive history JEEP has stood for Just Empty Every Pocket lol. There will always be good ones of anything. I had a great 2003 6.0l PSD. It was the most trouble free diesel engine I've ever owned and I've owned every diesel Ford has put in a truck other than a 6.4l. That said, Ford just about went broke covering warranty claims on that engine, life long Ford customers were lost forever over that engine, and Ford ditched it (for something worse actually) after only 5y.