2024 Honda Civic Si Mpg. As part of our extensive testing regimen we ran a 2022 civic si, which is mechancially identical to the 2024 model, on. Blind spot information system (bsi) with cross traffic monitor *.
3 based on 2024 epa mileage ratings; As for the sportiest 2024 honda civics, the si returns 27 mpg city/37 mpg highway/31 mpg combined while the even more powerful civic type r comes in at 22.