i would have to say its abuse that puts stress on most motors or neglect.running a turbo when set up properly is pretty reliable as long as the person driving the car uses thier head and doesnt get crazy,and that goes for all motor and high compression too. just dont go crazy with your boost and get the proper tuning and fuel system to support your boost level and your golden.and be sure that you know what your motors limits are and keep it real.i would rather have a stock block whatever with a 6psi of boost than a stock block whatever with 15psi and a hole in the piston or bent rod