I agree...Torco is the best. It is pricey though.
If you are looking for something you can get off the shelf Lucas Oil "octane booster racing formula" is very good. It will raise a tank around 3 octane numbers versus the others raising it by a few octane points.
FYI...none of this stuff is good for your spark plugs or fuel injectors. They all leave deposits that can eventually lead to fouling or clogging.
09 RT Auto:
stock, 1.94 60', 13.12 @ 108.16 (3 days old)
Current NA: 60' 1.68, 12.441 @ 109.24
Current w/100 ZEX shot: 1.59 60', 11.691 @ 115+
Port matched shorty headers
home ported throttle body and 180 stat
Modded RT air box w/K&N drop in
Pred with CMR tune from DXC Depot
PI 3K stall converter