[Ecky]

EPA range of 400 miles, with 53 miles on electricity. 13.2 gallon tank gets you the extra 347 miles, works out to 26.2mpg on the rotary. One reviewer reported getting 15.7mpg on his test drive using the range extender. So, it's not efficient.

I figure it works, however. It's small, light, inexpensive, and for many drivers, they'll rarely ever burn gasoline. The EV range could approach 99% of miles covered, and it has a battery 1/5 that of a Tesla without sacrificing the ability to take longer trips.