With all due respect, I think there must be some miscommunication between you and your friend about the fuel consumption of a 767.  As was pointed out, at that rate the 767 would have an endurance of about 7 hours.  Perhaps it was pounds, not kilograms?  Anyway, what I am getting is closer to the Captain Sim documentation, wherever they get their numbers from.

In all honesty, it would be nice for them to pop into these discussions once in awhile.  Not everything is a ticket item and they have more information than I do.

At any rate, 133,000 lbs is what the fuel planner recommended with a 50 kt tailwind.  Is landing with 20,000 lbs good?  258,000 lbs is well below the maximum landing weight.

My last flight I loaded 111,000 lbs of fuel.  I arrived with about 3000 lbs.  That is figuring FSX estimate + 30% + 5000.  Basically, that cut it closer.  35% would be better, maybe more.

Since Captain Sim refers users to the FSX fuel planner, I am trying to come up with a formula that uses that, rather than an external program.  FSX estimate as is is a suicide mission, not a flight.  I am trying to keep it as simple as possible for people who just get the airplane and want a reasonable fuel figure for trip planning.  So I am working it out by trial and error.   I'll probably come a lot closer to the Fuel Planner numbers by the time I'm done.

I did think the picture was funny, considering a 5000+ nm trip came down to a matter of feet clearing the runway.  Not funny in real life, obviously.