I noticed this in the short time my car was at my house (back for completion now) and wow, it smells all the time, even if not running. In fact, it took two days for the garage smell to go back to normal. . . . I couldn't believe it.
I plan on intalling a through the wall exhaust fan and let it run a lot. And pull the car completely out of the garage before starting it.
However, I think the smell will always be there. . . . think about it, the gas and
oil are all open to the environment and there are no emmessions on the exhaust. New cars are all sealed, we forget how things have changed. . . .
Anyway, it's "par for the course". . .