I'm driving my 1st-gen HF again and if I do just the 7-miles from home to here where I use the computer I'm seeing no better than 34-mpg (tank mileage).
If I top off and hit the highway at the old 55-mph speed,she'll pull 52-mpg 'naked'.
The stop and go and short commuting never allows the the car to reach equilibrium warmup conditions.