Yes. There is no reason to use a higher octane on your 4.7 and like Dodge says, a higher octane has the possibility of decreasing your engines performance. Will you notice it? Probably not, but why pay extra for something that has no benefit?

And on the subject of gas, the biggest difference between the companies is the detergents they use. And guess what? Most generic gas places also have detergents. There's been studies done showing that generic gas vs a popular brand shows very little difference in quality if any at all. It's all marketing. Also, these gas places rant about how great their additives are at removing gunk and what not but what they don't tell you is that their own additives leaves deposits behind as well. I get mine from Sams club, its one of the cheapest around and the gas is always fresh since it's busy all the time.

 

sounds like rocket has been suckered into believing all those advertisements

 

Alright 87 octane it is! well at least its a lil better on my wallet

 

No I've been around long enough too experience the difference from a watered down version to a quality product.
jmo nothing else.

 

Base fuel for everything other than the Hemi which needs min. of 89ct.

The whole deal about hurting the engine...lol...no way. No damage will result from using 91 or 93 octane in an 87oct reccomended vehicle. Higher octane fuels resist degrading far better than lower octanes. It will guarantee top performance and no pre-ignito or detonation.
What happenes where its not needed..owner pays more money than they need to for gas.

 

but when i get a tuner, i def. need to run high octane, am i correct?

 

If you choose the performance tune or towing tune then yes you'll need the higher recommended octane. And DD is right, running the "premium" will not hurt your truck but since your compression is designed for 87, then you might as well use 87 without a tuner.

 

I don't know if they changed in '06 but my '04 manual told me 89 octane is what they want to go in my truck. I looked at it tonight.

 

Thats odd, cause on page 256 of the 2004 Owners Manual it says this;









I dont have a paper manual so maybe its different?

 

I just looked it up you're right. My paper owner's manual says use 89 but everything online says 87, even from Dodge. D@mn have I been wasting money?