Lunati Voo Doo Cam.

rumblefish360 said
You can always try and ask out T-Mobile down and see how it works. Just a small amount will do, a couple of gallons that’s it. If the fuel doesn’t work out, you can always load it back up with what it likes.

Yes, easier to just try the lower octane than try to figure it out! Just listen for knocking at medium to hard throttle, and back off if you hear it.