I just refilled my Hybrid Accord accord today for the 1st time. I burned 10.344 gallons of fuel to go 248.5 miles for a mileage of about 24.0 mpg. For what it is worth, the cars trip computer recorded a cumulative mileage of 23.3 mpg. This is mostly in city driving short trips (20 min) in cold Boston weather. 80 miles were highway driving where I was averaging about 34 mpg. In short trips in cold weather, some of the hybrid functionality doesn't kick in until perhaps 5-15 minutes in to the trip.

When I added the mileage for my car "Firefox" to the database, the Honda Accord Hybrid showed up as "not a hybrid", so I will let the site owner (Jason) know to add it.