Sometimes I think we forget that people post partly because they want to be part of the community, engage in the discussion. It's more fun and more enlightening then going back and reading a discussion that other people had some time ago.
Live and let post - that's my motto!
BTW -- I have no idea the true capacity of my fuel tank.
Come to think of it, of all the cars I've ever owned, I've never known this or cared to know.
For the smart, I drive roughly 300+ some miles, pump in roughly 7 - 8'ish something gallons of gas, pay the man and move along.