Assuming they departed with a "normal" fuel load I would guess the extra flt time FCO-GVA & time spent in the hold "negotiating" probably left him without too much.
Although some question his sanity I would doubt if he was mad enough to play "Russian Roulette" by holding out until an engine flame out .
Unless he had a big fuel imbalance the 2nd one wouldn't be far away if that really happened . . . Shirley he wasn't THAT loopy ?
