Blake,
That makes good sense to me. The questions that come to my mind then are:
1. Is 89 or 91 rated octane going to leave deposits in a stock GT due to the compression?
2. If the stock GT compression is high enough, then I should get better performance from 89 or 91 octane.
3. If one uses too high an octane and deposits are left, then what happens to the deposits? How are they removed if at all. What are long term effect.
4. Who is putting the better quality fuel at the pumps?
It appears that using the wrong octane rating whether too high or too low could have a negative impact.
I must be reading too far into this huh..
