I loaded up AH II today and was trying for max altitude in a 262.
I changed the fuel multiplier to 2.0
I noticed that fuel consumption went way down at around 47 or 48k.  It dropped to just under 1000 gph.
After I passed through 68k, the aircraft graphics disappeared, but came back as I once again passed through this altitude on the way to a landing.
Alt achieved:  78.1k  
I don't have a place to put the film or I would link it.
What is the max altitude that anyone has achieved (AH II)?
Spec4462