Explain exactly how higher octane is in any way going to affect performance on the cruze?
That car isn't pinging. The engine block and air intake remain relatively balanced, regardless of the outside temperatures.
I already ran my car with Premium fuel.
But Premium fuel from off brands like racetrack, Mobil, Esso, and other no name brands, do absolutely nothing performance wise.
The only 2 brands are BP and Shell, and that's not because the fuel is Hi-Octane.
If anything, higher octane should lower MPG, when riding the car moderately, because it takes longer to combust.