More user interfaces
Allow for US-based or Europe-based interfaces and remove the other-based statistics on the log views (if US, remove liters/kg).
Enlarge the information grid and reduce side-scrolling on the log screen. I'd like to see MPG, trip meter, and total cost without scrolling.
Version 1.5.1 has just been released. You can now hide some of the columns from the fuel log in Settings > Fuel Log Display.