High guys. I have a 2021 2.0T that I will be getting tuned next week. Didnt like the ktune stage 2 as I didnt really notice all that much of a difference. The area I live in doesnt have a E85 within 120miles. Everyome says to run 1-1.5 gallons in a tank of gas but all we have here is E15. Would E15 be beneficial or should I just stick to 93 here? Only modifications are audio upgrades due to how terrible stock audio is and a intercooler.