Uber's launching a carsharing service that would allow you to rent out your car when you're not using it. Uber Carshare, launching in Boston first, will allow car owners to set their own hourly and daily rates. Fuel is included in the cost. Car availability will be made in 15-minute increments with no advance booking required. The company explained "For years, Uber has made it effortless to tap a button and get a ride on demand. Now, we're taking the same approach with car-sharing by making it simple, affordable, and sustainable for you to borrow and list cars in your neighborhood."