Good post WVGasGuy. I wanted to add one thing. If your car sits for a while the ICE will run to warm up the catalytic converter when you start it up. When I come home from work I have about a mile in a 25 miles per hour zone. Going to work I have three miles getting to the navy base in 35 and 45 miles per hour zones, followed by 1.5 miles between 15 and 35 on the base (and they're strict). Knowing that when I leave base the ICE will be on anyhow I don't care how much I run down the hybrid batteries and try to do the last 4 - 5 miles as much as possible on electric. That is enough to bring up my mileage about 2 mpg. Since the ICE will be running when I start off anyhow, thereby charging the batteries, those last few miles before arriving are free miles.