Fuel selector Both or fullest
My POH states on take off and landing select "Fullest Tank or Both, I always select Both as it seems safer, is there a chance of engine feed interruption in the unlikely event one of the tanks running dry while set to Both in a gravity feed system? If not why would Fullest be the first choice in the POH as opposed to always using Both for TO and landing which seems like a more logical/safer option? (note: there are 3 inline pumps on the fuel system, 1 engine driven, 1 boost and 1 for vapor lock (there are additional 2 that are not relevant to this issue as they are xfer pumps)