Even crazier, it’s better than my 2007 Civic. Granted, an Si, but still. 23/31. And that was actually revised DOWN to 22/29 in ‘08 or ‘09 when they updated the test procedure. It’s extremely impressive, when you stop and think about it.
Chevy spent much of their engineering budget on the new-from-the-ground-up engine, and here we see the [impressive] results. They did not spend so much on the interior (or rear suspension, for that matter).