RE: engine dying
Break-ins are tough on glow plugs, so I would still try a new one. There is no need to throw the fuel away. If new fuel fixes your problem, use the old fuel for break-ins. If it doesn't then you are eventualy going to need more fuel anyway. You could even "borrow" a tank of fuel from someone at the field, and maybe even a glowplug. At least you can mark that off your list of possible causes.