First, I always load the 747 from default Cessana, then choose the 747load my flight, then adjust fuel from the PMDG menu, for the duration of my flight I receive a message that my fuel is low and auto fuel is available by pushing control x, what is causing this and what am I doing wrong?Thanking you in advanceDave

Dave-You are getting a warning from MSFS because we override that system entirely.Go into the SETTINGS menu, then REALISM. UNCHECK the "Display Flying Tips" box...This warning from MSFS is happening because we force MSFS to use fuel in the manner we want it used- and not in the manner the sim wants it used. We've tried to get MS to give us better tank logic- but that hasn't happened. ;-)