BTW, as we are talking about saving fuel. Maybe you could clarify sth to a lowly ATC. Do you save fuel by loading less of it, or by burning less of it? Let's say your sector requires 8T of fuel (enroute, hold, diversion etc). You can load 10.5T, or you could load 9T, changing the margin you have. Does loading 9T really means you save fuel? (I know that this 1.5T difference makes your total weight bigger and affects performance, but would it be significant for fuel burn? Let's put aside MTOW etc.). If you load 10.5 instead of 9, and arrive with 1.5 more, this fuel is not lost I think...