Two 2025 Civics Can Differ by 18 MPG. Same Year, Same Name. (forcar.org)
A single model year can carry up to 13 separate EPA ratings. The 2025 Honda Civic 4-door spans 31 to 49 mpg across four powertrains — a 58% difference between two cars with identical badges.
You look up a car's fuel economy, get a number, and assume it applies. For thousands of model years it doesn't — the same badge covers engines that differ by more than half.
