For those of us with the SRT there is one octane (93), for the R/T the recommendation for best performance is (89) and for the SE (87).

 

Found this...

"Listen, if you bought a Challenger you should put a quality fuel in it, of that there is no doubt. Diablo Tuner recommends BP but it is not listed as a top fuel choice, but believe me from my experience with a sometimes heavy right foot, it is Top Tier, it would be wise to read all you can and draw your own conclusions on which fuel is best for you. I look forward to your comments!"

 

With gas prices, it's cheaper to add octane boost to the lowest grade and end up at 95-97 octane. It cost's about 5-7 dollars less per tank and the rating is higher.

 

The manual says not to use fuel with ethanol. In Hawaii thats pretty much all we have. Am I screwed or what....

 

Dodge warns NOT to use E85. 10 percent ethanol blends are OK. Minimum of 91 Octane.

this is per owners manual

 

Ah, thanks for the heads up...

 

The regular gas at the pump and half a bottle of this per 20 gallons:

http://www.jegs.com/p/Lucas+Oil/946650/10002/-1/10317

= 95-97 octain

 

The owners manual says not to add any gasoline additive to the fuel system. It can cause engine failure and I'm sure violate the warranty.