If you want to improve the mpg of a prius, just do what yall tell newbies to do. Ive done a lot fo my Insight which looks similar in shape t a prius and its helped me almost double the epa. As I tell newbies on the Insightcentral site, adjust the nut behind the steering wheel for better mpg.
The prius 3 I drove wasnt smooth. It felt like I had a 12,000 btu window air conditioner under the hood when the gas engine fired up. Then when above highways speeds I had a leaf blower sound come and go from the rear seats.
