Having a quality car is necessary and maintaining it is also necessary. It is sad when one acquires a good car and loves the car so much and suddenly the need to drop such arises. The truth is that irrespective of how much we maintain the car we love, it can never last forever as we may expect. According to the half-life theory, every material on earth made by made has its life-span and that applies to the metals used in the manufacturing of that your favorite car, which simply means the car has its expiring date. When the expiring date is reached the car will start suffering from metal fatigue a good sign that gives rise to metallic rust and internal cracking of the metal sheets of the car body. You now see the reason it will not last forever. The fatigue and depreciation of the car bodies and other major parts including the gearbox have nothing to do with the expiring date of its engine, be it new or old car engine.