I have a 2008 Malibu LTZ with the factory 18" wheels, still have the factory GoodYear LS2's that will be going on 10 yrs, car has only 55K and is mostly parked in the garage and driven once or twice a month, how old is too old for tires, still have plenty of tread and Xcellent wear, has 3 alignment checks since new. 
