..shell V-power 93 octane high-test premium go-juice...
Is that 93 (RON + MON)/2 ?
You'd think figuring octane ratings wold be easy.. but nooooooo ....
RON, MON, ROZ, MOX, AKI, (RON + MON)/2.... sheesh.
it's looking like the answer to my questions is ...screw the octane rating numbers, use high-test.
:-)