Originally Posted by blackfang
EPA ratings are just that, a rating. You can not diagnose or fix low fuel economy except for a few minor adjustments like tire pressure and performing vehicle maintenance. Outside of that, the ECM controls everything and makes adjustments. Other factors that contribute are driving style, winter blended fuels, etc.
I think this thread belongs elsewhere because this is not a warranty /SOA issue.
You don't feel a company making a false claim isn't a corporate issue? Honda owners tended to disagree with the Civic Hybrid claims.