So, while my car's in the repair shop, I've been driving this Honda Accord V6, which can do 21mpg (…) city and 30mpg highway. In the first week of driving, I got 23mpg overall (…;;;) although I was mostly driving on a freeway—I commute between Sunnyvale and San Mateo. So I tried something different: Liberal usage of neutral gear position, mostly in mild or stop-and-go city traffic, and for downhill coasting because I can sense a terrible amount of engine braking/drag if I just lift the foot off the gas pedal without shifting to N -_-.
I just refueled it this morning, and it scored 27.5mpg overall.
Can't be unhappy at 20% extra miles. XD