Goldenrivett
We are discussing two different aspects of this case. One is practical real life decision making the other is theoretical possibilities. SOP wise there is no gravity feed cross feed with AEO. So situational decision should have been taken whether to continue at same level or descend or to continue to destination at all or divert. Our decision cannot be based on inventing a procedure that is not supported by SOP. What you are suggesting is OEI procedure. In that situation you do not have up wing engine. So in AEO scenario with gravity feed on the up wing engine what will happen to that engine is only a guess work. If you landed up in that situation(which you should not) then you can take your chances. There is an incident in safety magazine where A320 climbed to FL380 with fuel pumps off before both engines flame out. So nothing may happen but no guarantees.