Aviation gasoline is much higher octane than the "premium" (or however it's branded) high octane gasoline at your local gas station. Typically premium gasoline

Aviation gasoline is much higher octane than the "premium" (or however it's branded) high octane gasoline at your local gas station. Typically premium gasoline is about 98 RON / 88 MON, whereas 100LL aviation gasoline is 100 MON. The big news here is that GAMI has come up with a formula that provides the required octane without lead, and also otherwise fulfills the various requirements for aviation gasoline.