No you don't. 89 is recommended, not required. Heck, I've used nothing but 87 in my Hemi Durango for the past 5 yrs and 120K miles later it's still running like a champ.Yeah I hope it treats me well. $96 to fill it today.. gotta use 89 octane for hemi's.
are you guys using super chip or ?
Mine is bone stock. Still has the stock air intake, stock tune. The only difference is it has a magnaflow cat back from the previous owner. I intend to make a cold air intake system for it this year sometime if I ever get around to it. I just can't seem to find the stuff I need available (since I don't want to spend $300 for a piece of tubing).
I would like to hear some testimony from guys running a programmer....any increase in MPG's?
Yeah, me too. The mine has a CAI, not sure if its had any other mods. It does have a good exhaust tone though.