I was also suprised today to see an HCH in my own small cow-town.

Another tell-tale sign is the grille.
Look at the air-intake area between the headlights, on the body-colored bar or bracket that the big "H" emblem container is fastened to.

All other Civic's this bar or bracket is very narrow, while the HCH is very wide.

Efficient drivers do it better.
1003 miles a tank personal record. 74MPG calculated. HCH1 CVT