My fuel economy has been as good with E30 in it as running 91 as of late. I think I just needed to quit throwing x gallons of e85 in one tank and y gallons in the next. Got 14.5 my last tank, not bad for having neg temps and using the remote start every morning. My LTFT usually stays in the positive range, while the STFT fluctuates MOST of the time in the low positive and dips into the negative, occasionally into .8x. I just want to tune for it to maximize the effects of E30 and its octane.
