SD and Zax--totally not feeling that either of you were disrespectful re: OP and unfamiliarity with boxer engine. I do absolutely think this a very real thing that I will adjust to--also, my self-deprecating humor does not always translate well via messages.
As it happens, the neighbor ladies across the street have a WRX, too, so I will inquire of them re: gas mileage and idle. As an aside, they probably think I'm obsessed with them. They have a greyhound, I just got a greyhound. They have a WRX...etc.
Lastly, I plan to make great use of the forae, as I have already learned an incredible amount in a very short time. I really do appreciate the info and feedback; I will continue to give updates as my car and I get to know one another.