Don’t mess with my mileage Hyundai went through the roof to maximize fuel economy for its redesigned Sonata Hybrid sedan. The completely re-engineered sedan debuts a solar roof system that recharges the engine-cranking 12-volt battery and the hybrid battery. Depending on region, the sunlight system could provide around 1,200 miles of free driving, such as in Southern California, Hyundai says, or more like 600 miles a year, or 2 miles per day on average, in...