"older" means that Classic and 2G models are older than 2010. It is true that the fuel tank bladder was one of Toyota's less successful ideas. Fortunately it has disappeared from current production models.
One thing I do notice when filling the tank is that the cap is never tight when I remove it. After filling I always give it a few clicks on the cap. Why is it loose at fill up? Is this normal?I guess I should check it after a couple hundred K's! Hal