FSX estimate + 40% + 5000 lbs gave me 22,000 lbs left over with a typical eastbound transatlantic tailwind on the KATL-UUEE flight this time, which is pretty much what I would have expected using the fuel planner.  I used 102,000 lbs of fuel which works out to 9488.37 lbs per hour.  Fuel consumption has been very consistent.  This is pretty close to the numbers in the 767 documentation. Based on my online research (which gives wildly different estimates) I think this is a very reasonable number.

I'll use the same amount on the return trip and see what happens.  It is looking like FSX estimate + 40% ought to be safe in itself for long distance flights with a tailwind at any rate.  I'd be curious to see what other people come up with.  The Atlanta-Moscow route is a nice long one that you can start before work and finish up after supper.  If anyone wants my company route I can send it to you.

I generally use 9L and Dawgs4 with a SPA transition, thence to the NAT, then plot something as direct as possible on airways to come into Sheremetyevo from the north with the SW07A STAR for Runway 07L.  Remember that your North Atlantic fixes are entered in the format 5150N, 5240N, etc.

As an aside, the airplane managed the entire flight once autopilot was engaged, all the way to touchdown, except for me setting flaps and lowering the gear, and then taking manual control of the throttles on short final.  The neighbors probably heard me saying "Oh yeah, baby, that's beautiful."

What can I say.  I enjoy my airplanes.