I'm from Cleveland where high octane gas is normal, but i recently got stationed out here in Mountain home air force base Idaho (middle of no where), and the highest i can find is 91 or some times 92 if i'm real lucky.
I have hypertech programming and was wondering what it really messes up not running the correct octane. I have heard plugs and some other things but nothing that was for sure. also is octane booster a safe solution???

Help me !

 

i posted a question similar to this recently. everyone is of the opinion that 91 is just fine. i know that the hypertech wants 93 but here in cali. i have yet to find a gas station that sells better than 91. okay, unical 76 sells 100, but its almost $5 a gallon. have you tried the 91? do you get knock? if not i wouldn't worry about it.
by the way, once i filled up on the 100, and didn't notice any performance difference. i did get about 75 extra miles to the tank though.

 

Basically the cars computer could care less if you use 91 or 100 octane. Other then your butt dyno anything over 91 octane is wasting your gas dollars.

 

I just hope this doesnt turn into another heated octane/octane booster debate. Im tired of them. Do a search and you will find plenty of info supporting both sides of the ever-so-popular octane question.

 

It is my experience that the HPP3 power tuning advances the timing too much for 91 octane in the warm weather. With the tuning in I was experiencing 3-4° of knock retard. You can pull the power tune and still take advantage of the other settings available.
In cold weather it should work fine.
And octane boosters are a joke.