My previous car was 1994 Honda Accord Wagon 4cyl and did a lot of short trips (less than 10 minutes).
Our records were 14 mpg in winter and 18 mpg in summer.
Now, I drive 2004 Prius with same patterrn, less than 10 minutes short trips.
My Prius recoed is 35 mpg in winter and 47 mpg in summer.
I'm happy about Prius.

Ken@Japan