Definitely do not run the 93 octane using 92 octane gas. Your car will pull timing hurting your performance. I've seen more than one dyno sheet where someone makes a stock run, then does a performance run with the predator on the 93 tune... and performance stays the same or worsens because knock retard (KR) kicks in. This is most common on SRT8's as their heads and intake suck air in better than the RT... which can make them run lean on the default 93 CAI tune, which means KR kicks in.For those of you who own a Predator or Trinity, what tune do you use when you can not find 93 Octane fuel. All I have found in Hawaii is 92. What tune should I use, 91 / 93?