The EPA has released fuel-economy numbers for the 2013 BMW X3 with the 2.0-liter four-cylinder turbo, and they’ll put the X3 xDrive28i at the head of the luxury crossover mileage table—well, not counting hybrids. The new X3 gets a combined 24 mpg with a 21 city/28 highway split. That combined number is 3 mpg better [...]