hey i was just wondering, does anyone know (like with some reasonable evidence) just how neccisary the high octain "requirement" is? i know that using lower grade fuel will decrease my performance, but i'm curious as to weather or not it would be harmful to use regular unleaded. Some places super unleaded isint readily available. also if theres nothing to sacrifice but a few HP i think its more cost effective to use regular, its not like the FJ is underpowered.