If you look at the database you will see that the two cars in the title are tied dead even at 48 mpg right? Closer inspection reveals (to my surprize) that the MT HCH is at 48.4 and the Prius is at 47.5, almost a full mpg difference in favor of the MT HCH! They have been almost tied in the past being only a few tenths apart. Anybody want to guess why the HCH is ahead by almost a whole mpg?