I think you're right...my fillups are between 10 and 12 gallons now that I look at it...it's probably an 11 gallon tank. I'm thinking of our accord that's 14 gallons.
564 miles @ 41.6mpg. It supposedly holds 17.1gal, which would have put me dry at just over 700miles at that FE. I doubt I'll ever do it, though...too paranoid. On average I leave a 3-4 gallon reserve.