Also 2.6L changed timing chains at ~250K and oil pump because I was there nothing else, the old one was at specs. valve seals at the same time, oil used was M1 5W50 for the first 300K. of our ownership then swapped to Amsoil ACD and then HDD when 5W50 disappeared from the shelves and wanted to "try" this thinner is "always" better deal, the engine didn't liked one bit, became noisier and the wear rate increased a lot, somewhere between 150~200% higher, I was going back to at least a thick 40 like a rotella T6 but parked it before that. I was using it as a work truck, very much like an UPS truck, that's heavy.