The Ford has 98,000 miles - mostly highway, with some City. Chevy - was kept in a garage, but all city miles. I'm leaning toward keeping the Chevy, but since it was all city miles - which is rough on an engine - and since it's 17 years old, will it cost a lot soon in preventative maintenence? IE-does it need a new timing belt becuase of its age? I'd like to hear any and all thoughts on this issue before I make a decision. Which one would you keep and why?