"Quite a while," Drift says with a shrug, spreading an open palm. "I was forged a little before the war, but I know some bots who are over six million years old. Depending on what creation myths you believe in -- although I object to the term myth -- it's said that the destruction of the deity Mortilus the Death-bringer by the rest of the Guiding Hand allowed our sparks to burn indefinitely. We can technically die of old age, or at least conditions brought on by it, but...the lifespan of your average Cybertronian was a lot shorter during the war."