1/4 tank left (91) — 100 octane it for 1st time?

[PMR818]

I have never put anything into my Stinger other than 91 pump. Given that I’m not impatient about race fuel speed gains if any (meaning I’m willing to take baby steps putting a little race fuel at a time to not ruin anything under the hood - ie guess-and-check method) what do you recommend in terms of how much 100 octane I put in given my current 1/4 tank of 91 pump? And which map do I run on JB4 with 100 octane? Daily drive is map 2 on 91.

 

[Slip_Angle]

Start with Map 3 and see how it runs

 

[Tonkabob]

Run full 100 e30 mix and go for it. I've run full 100 and car loves it. And if it doesn't the car will protect itself via throttle close. It's very protective. Like when WMI fails.

 

[PMR818]

My car has been loving E30...despite the high price I don't see myself not using E30 moving forward. Very happy customer! This car moves...