owlafaye Posted: 1/21/2012 2:30pm PST The average age of my cars is 14.4 years. My first car, a Ford 1929 Model A was 25 years old when I bought it. It still ran and drove, albeit shakily...however cars nowadays are good for 20 to 30 years with some judicious upkeep. People tend to sell cars that have a lot of life left, just selling for appearances and vanity. A new engine or transmission and some major maintenance can extend the life of a car by 10 years.