The broken pistons is generally caused by LSPI (Low Speed Pre Ignition) that breaks the ring lands or if severe enough, the entire piston. Well documented.
There can be NO conventional oil or synthetic blend used on a GDI engine and the bigger names like Amsoil, M1, etc. have a newer formulation that renders the oil vapors less explosive to combat this. Our dual valve E2-X systems also prevent this by providing full time flushing and evacuation of the vapors from the crankcase.
The combustion by-products along with the greater amounts of raw fuel present overwhelms the engine oil. Look at this oil analysis running this system to see how dramatic the impact is on oil life on this modified turbo car at over 13k miles. Next sample will be at 20k miles. As you can see, a proper crankcase evacuation system (not just a catchcan) does far more than address oil ingestion, etc.
GM did make the pistons a bit stronger after the first 2 years of failures, but that is again just addressing the symptom, not the cause.