Yesterday I had a dead Interstate battery. I know my mom bought the battery 2.5 years ago. So I brought the battery into Firestone. Since there was no date stamp on the Interstate battery, They could not find my mom's info on the system. So I walked out and began to take photos of any serial numbers I could. Roger (The Manager) came out of the store and said he would honor the 5 year warranty on the battery. So the next set of Tires will come from this store. They won my business. Good Job Roger! Good job Firestone.