Has anyone thoroughly modeled a total cost of ownership for the Volt? I get asked the question a lot; my friends want to know how high the price of gas has to go to economically justify the purchase of a Volt versus a $20k fuel efficient car, for example. I know I paid a premium for the cool technology and being an early adopter, but the performance and savings are actually better than I had anticipated. The biggest challenge I have is estimating the maintenance costs. I know oil changes are only required every 24 months or so, but what about other maintenance? Did Chevy provide those numbers somewhere?