I am a new Prius IV owner of just less than a week. I have been doing lots of reading on PriusChat (and thank you all for the great tips). However, no matter how careful I am to follow the tips I see on here, I only average 38 MPG. I know there is a period needed to break-in the vehicle, but my MPGs seem out of the normal range of low. I'm driving the vehicle in the moderate temperatures of the San Diego area. My daily drive is about 20 to work on city streets of 50mph with very gentle starts and stops. I'm assuming its me and my car's not a dud. Any suggestions to improve my mileage? I have to go back to the dealer in 2 days. Anything I should ask them specifically?