Americans spend 293 hours driving each year, according to AAA. That’s more than 12 days worth of data on where we go, what we listen to, and where we stop for lunch. And make no mistake, our cars are “watching” us. John Ellis, a former global technologist with Ford and author of a new book called “The Zero Dollar Car,” imagines that we’ll be able to trade in that data for cars one day. Marketplace Tech host Molly Wood talked with Ellis about the value of car data.