Now a days it is very easy to buy a car but very difficult to maintain it. We take good care of car when it is brand new car, for instance cleaning it every day, water wash etc but that will be there only for few months and after that we can see the cars unclean for days.
I feel that however old is your car, proper care should be given to it. The life of your car depends on your maintenance.

You should know your car well and know what it are the most important things a cars needs. To start with are the Car cover, Seat cover, Steering-wheel cover, Floor mats, handheld vacuum, Hands-free cell phone connector, Emergency Battery Charger, and Child safety seat. So know your car needs before buying it!