It probably is. Too bad there still doesn't seem to be a "PriusStats" website. (Fuelly is okay for guessing what the overall average mpg is (~46mpg) for all Priuses, but it's all self-reported and nobody seems to know wtf kind of Prius they got. (don't laugh, the Volt figures there are worse).) (Did I get all the parens right there?)My point was that even if you turn the heater off, the car will still heat itself to keep the battery warm. I didn't get into the specifics about the different heaters and loops. Personally, I'd rather be warm and blow my EV mileage than be one of those crazy people who don a snowmobile outfit and disable ERDTT to gain a few miles or avoid a fuel burn. Especially when I am known to take on any and all pony cars at stoplights. With all this abuse, I'm still achieving 70 mpg lifetime, way better than any Prius - except now maybe the Prius prime is getting close to achieving gen1 numbers.