No one can say what things will definitely happen to you, but I will share my experiences. When my 2000 3.0 5 speed reached over 150,000, I replaced a few things. They were: alternator, water pump, cam position sensor, Idler pulley and heater coil. These things I did myself w/ the help of this site and the cost was little compared to shop fees. The truck has not been abused and presently is running flawlessly. It is an easy vehicle to work on compared to others I've owned. I will not mention those other brands here. They can thank me later. I have also enjoyed doing upgrades such as; Hurst floor shifter, gauge cluster swap to add the tachometer and an explorer overhead console. I would consider that mileage a non issue on these trucks. Go for it!