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Hey Nate, there may be another JennaBear out there, never been on mustang forums .
For your Denali you should be running a minimum of 91, on your G8, 87 is fine but 89 is optimal.
Gains will vary based on quite a few factors, drive, engine, mods and gas (octane and quality). We typically see 15-25HP on the Denalis, and 15-20HP on the G8.
Sent from a jelly bean.
Two JBs? Oh hell no!!!
Sorry about the confusion. The "Jennabear" I'm familiar with lost his daughter (Jenna Bear is what he called her) to an accident cause by an idiot hot rodding. He started the Jenna Bear foundation after that.
http://www.jennabearsfoundation.org/
Each vehicle is bone stock. I'm north of you in Los Angeles. Typical California 91 octane piss water. That's a pretty good gain from a tune on a gas engine.
Ah yes, I have heard of this foundation. I believe they hold a lot of fundraisers in AZ?
We are located down in San Diego, so we could get you taken care of inperson should you be interested. Otherwise, we could get both your vehicles tuned using the AutoCal.