[adamjwilson]

First, I don't have an AFR gauge in the car. However if I recall correctly, reading the HP Tuners while my Tuner and I took it out some time ago doing some logs, it was running 12.7-13.0 on E, and somewhere around 14ish at idle. You on pump 93, you probably running a tad richer. E allows the ability to run a little leaner due to being superior at cooling the combustion process and pulling heat out of the cylinder.
My car is set up the way I want it for the street (not strip), so I am not the type to continue to run logs to tweek the tune.