[Tom Goldman]

14.1 compression hardly requires C-16 fuel .
My Big Block combination has 15.9 to1 and runs perfectly on C-14 or, for the last 2 seasons on Sunoco Maximal Red.
At 14 to1 , depending on the cam and ignition timing Sunoco Blue or VP C-12 should be more than adaquate for a throttle stop application.
While oxygenated fuels such as Q 13 or Q16 have some benefits, there are many drawbacks to it , personal safety being my biggest concern . ....MTBE is nasty stuff, and the fuel requires more attention as far as storage in the fuel system.
In the big picture , fuel cost $ per gallon from one grade or brand to the other is minimal.
Run the higher compression, the car will be more consistant when heat and humidity go up than a low compression setup.