Wow, to get 30 mpg in a Prius you'd have to drive one mile, then turn off the car for several hours, then drive another mile and repeat. In other words, do ultra-short trips. One time I drove a Prius with A/C on and floored it every time I accelerated, never coasted, and drove 90 miles per hour on the highway. I averaged 39 mpg over 60-odd miles according to the display.