OK, so anyone notice big differences in throttle response/daily driving between 91 and 93? I originally just defaulted to 93 and was planning on using 91 for my trips to Cali, but 93 seemed so super aggressive throttle with a loss of very low end power, so I switched to 91 for my commute this morning and it seems 91 is much better for daily driving... still great power but very low end like 2nd gear very low speed rolling through a stop has a bit more grunt to not bog down. Like the email said, with 93 I do spike to almost 26.5, that is normal and with 91, on top of the better driveability, did spike about 1-1.5 psi less... It's almost like 91 octane for daily driving, and 93 for all-out performance including ultra-sensitive throttle response that makes driving in traffic require more attention to detail to drive smoothly... Any way you cut it, even if I didn't expect this, I like this option, so bravo Alex and Stratified!