I wish I’d said that.
Oh wait, I did, or most of it to the extent it’s accurate:
To the extent that the way in which an engine is run may cause insulator cracking, (3) would be running the engine RICH OF PEAK, but not far enough rich of peak.
I listed the top 3 causes, not the only causes.
The most efficient way to punish an engine is to run it ROP, but not far enough ROP. As I said, the surest way to cause detonation in my engine is to run it where the POH says to run it.
You can also punish an engine if don’t you run it far enough LOP. But you will
never be giving it as good a thrashing as you could ROP.