I have just discovered this newsgroup, so please forgive me if I ask questions that have been raised before. I would like to hear about your experience with gas mileage. Since picking up my '05 Prius, I have filled it four times. My MPG averages 44. The last was 38. This is disturbing, so I arranged with the local dealer to look at it. They did a number of tests, particularly the highway test, today. Result: 44 MPG. The service guy said that the MPG will increase with more miles on the car. I have only 2000 so far. Also, he said that my MPG would increase if I would fill with a better grade of gas, such as Chevron or Shell. I have been using Arco. I would appreciate any comment, particularly comparing with your experience. Many thanks.
Harlan