Hopefully the moderator will rename this thread to something a little less misleading.
The report does not say "an engine failure because of a low fuel level, it says an engine failure and a low fuel level. Flying any distance on one engine will result in a higher fuel burn than doing so on two engines, particularly if it is a longer distance, because you can't maintain the same altitude that you can on two. It's also likely that this flight, being relatively short, wasn't carrying much in the way of extra fuel.