I agree right out of the book, 89 is the recommendation.

 

And I quote..."The routine use of premium gasoline is not recommended. The use of premium gasoline will provide no benefit over high
quality regular and mid-grade gasolines, and in some circumstances may result in poorer performance."

 

With the Superchips programmer and the "power wire" resistor mod, I don't mind using 93 just in case. Why complain about a $5 difference in fillup cost when you're over $70 anyway?

 

so i guess i'll just start putting in 89, sincetheCAI is the only MOD

 

Damm this is the best place to get ur answer's... Thanks guys

 

Using 93 octane since new in my 05' with SuperChips set on theperformance tune and other additional performance mods too; so far so good - but cheaper fuel prices would certainly be welcome as well.

 

With the hot rod setting from a programmer, thats a little different. Your ignition timing won't retard with lower octane fuel like the factory setup would. Need to use premium then.