Move over, Nissan, because there's a new MPGe king in town. Yesterday, the EPA anointed Tesla's Roadster 2.5 with an MPGe rating of 119, making it the most fuel-efficient car on the market. That places the plug-in ahead of both the Nissan Leaf (99 MPGe) and Chevy Volt (93 MPGe). According to the government-approved window sticker, Tesla's EV can last for up to 245