According to official figures, the 2018 Mazda6 with the turbocharged engine will get 23/31/26 mpg city/highway/combined. Not surprisingly, these numbers are lower than the Mazda6 with the normally aspirated engine with the six-speed automatic (26/35/29 mpg). These numbers aren’t far off the normally aspirated car with the manual transmission (24/33/27 mpg), although the turbocharged car will only be available with the automatic. The Mazda6 turbo’s mpg figures are very close to 2.0-liter turbo cars in this segment. For example, the 2.0-liter Honda Accord Sport with 22/32/26 mpg beats the Mazda by 1 mpg on the highway, but has a 1-mpg disadvantage in the city.