Mutt
My FO is fat. I have to carry him 4 flights a day, 635 days a year. It all adds up you know.
Maybe we should put the crews on a diet and just employ size 8 hosties.
.
Everything 'adds up'.
20kg of gas wasted (by tankering 500kg for an hour) is a great trade off for the peace of mind (and the range of available options) that it provides.
20kg FFS.
Now I've thought about it a bit more, thanks to you & your 4% advice, and realised how little is wasted, I shall continue with my present practice and worry about it even less than before- if that's possible!