Ran across an article on octane levels as follows:

"Using low octane fuel in a high octane engine will result in severely reduced performance because the engine will attempt to adjust to the lower octane gasoline. In extreme cases, or with prolonged use of low octane gasoline in these engines, pinging or pre-detonation can occur and can eventually destroy your engine. Pre-detonation causes very hot conditions in your engine and can melt spark plugs and pistons."

I always run 91 to 93 octane gas in my 2013 ST and have never experienced heat problems. For those 2013's with excess heat, what octane gas are you running? Could running lower octane gas at least be one of the contributors to excess heat?