Would NOT advise to run a tank dry in an aircraft fitted with GTSIO- engines.
The result from the surging may well be a crankshaft counterweight chucked thru the case, NOT a happy thought.
Overhaul cost, 'round about $35,000 including a new case. No insurance coverage either as TCM has a service bulletin about this (and related) subjects. These engines have good reliability IF operated properly.
Also would definately agree about Dart engines, they are very reliable but traps are there for the unwary.