I was looking at the license plate frames in the online store. How about making one that allows the owner to change the MPG number? This would allow us to change the figure as our FE goes up or down, and allow for more accuracy in advertising. Right now, my average FE is almost exactly between 45 and 50 MPG, so the former frame would be too pessimistic and the latter would be somewhat deceptive (at least until I can get the FE that high

).
All that would be needed is the frame and 2 sets of digits 0-9 that could be interchanged in the appropriate space.