2015 Corvette Z06 - Is E-85 Worth It

I have a 2015 Corvette Z06 that I've had for about 2 years. I have a few modifications done - corsa headers, corsa xpipe, afe intake, katech throttlebody, mishimoto racing radiator/lines/thermostat and tune done by EFX tuning. All and all the car made some nice power gains, about 615whp. However, this is not enough. I am debating whether or not to do E85(flexfuel) but not sure how this has been on this car specifically. If you have a C7 z06 running E-85 let me know if its worth it or not to do. There is only 2 gas station in my area that even offer the fuel.