What is depreciation? Auto insurance and your cars depreciation are more closely related than you  might guess. Most of us are well aware of the concept of depreciation. It is that strange phenomenon by which our cars lose their value seemingly faster than we can even get them paid off. Once you finally have paid back the bank and own your vehicle free and clear, looking up its fair market or blue book value can be very depressing. If you take five years to pay off a ...