There's options in Powertuner and HPT for low octaine tuning. It says you can run the regular stuff in the manual if you have to. My opinion on this is, yes you can burn it but do not romp, get into boost, or do any hot rodding. Anything above half throttle is a no no.
This is what i'm currently doing. I refuse to run anything less than 91 Premium. I've been driving 5-10 under the speed limit on the hwy's and have been averaging about 3-5 mpgs more. I used to adverage about 24 mpg according to my DIC and 22 according to my calculator. I've been keeping my rpms's under 3k, and have been accelerating slower and driving slower. Is it fun NO! Has it saved me money YES! I paid 70bux to fill up 2 weeks ago so I want to make this tank last. This current tank has lasted me 2 weeks vs the usual 1.25 weeks.
