Lol. 2 days ago before I left town (in a different vehicle), the fuel gauge was almost at empty, so I had "fill up tank" on list of things to do. I was having nightmares of 25mpg on my geo metro.
Today when I started up it was showing just below half full. O_o After flopping back and forth during my errands, it was like 1/4 full when I stopped at the same pump that I used last time. Turns out the official number was 48 mpg which I can't complain about for learning to drive standard and hence purposely forgoing any hypermiling techniques. Extra loving my car already, but I think the fuel gauge will drive me crazy.
Still wish I knew how to use these BSFC charts to my advantage.