I was wondering how the odometer would fit the extra digit. I found out this morning, a few days short of 6.5 years since I got my Roadster (#670). My battery has lost about 13% of capacity (range mode charge of 212), which is much better than Tesla said to expect when they sold the car. Nevertheless, I signed up for the 3.0 battery, figuring that it may not be available for that long and because I want to keep my Roadster for quite a while. Though if Tesla ever makes Roadster Mark II, I'll be sorely tempted.