its completely possible... my 02 was turbo and i averaged 40 mpg. its all in how you operate your car.
his profile thingy says nor cal... ill prolly bet.... that judging by the weather....he hast run with the windows down, or any fans running inside the car, he probably doesnt have a radio...or he has turned it off. he drove in the daytime only. no rain.
i dont know anything about his car but i bet he has a full interior... no spare tire, no subs.
you dont believe us but the little things add up.
some people have experienced better mileage by using a higher octane gas... others have made complete fools of thier cars....but they get 50+ MPG...
and for all we know... he might have a diesel... and not even referring to his civic.