2025 Civic Si Mpg. 2025 honda civic si gets desirable upgrades; The si bests its most direct performance competitors by at least 3 mpg.
Even efficiency is impressive on paper at 27 mpg city and 37 mpg highway, although an enthusiastic driver will rarely see those numbers. 2025 honda civic 5dr 4 cyl, 2.0 l, automatic (variable gear ratios) regular gasoline