No not the blue....you want the yellow "flexfuel" 51-83%....that's the liquid gold. I wouldn't even mess with that blue E15
Get a water based ethanol tester from summittracing and start testing that flexfuel pump to see what % it's delivering. Let your tuner know so he can go by that to setup your ethanol tune.
You still running a return-less setup? My current goals are just ported Eaton so If I can get away the $$ for a return system that would be great. From my limited knowledge there seems to be a lot of debate on this topic.