The year is not over, but it's not too early to poll the members on best car.
For mass-produced cars sold in the US - my vote is the Ford Fusion Hybrid.
Yes, I know about the Aptera, European clean diesel that are not sold here
and the Prius III. The Prius is a best seller, but I lean towards not giving the same car the award unless it's a lot better than before and Prius is about as good as it gets at the present.