Could we have a fuel gauge that's marked in 1LY increments? It would become much easier to see 'at a glance what effect using a 3LY fuel tank will have on the range of the ship.
A Random Hits.OXP Space Bar. It needs Version 1.71.2 of Oolite and you'd need the RandomHits OXP installed.
OXPS : The Assassins Guild, Asteroid Storm, The Bank of the Black Monks, Random Hits, The Galactic Almanac, Renegade Pirates can be downloaded from the Elite Wiki here.