Octane rating?

What does everyone us in the hemi 87 or 89 octane the Manuel says to use 89?

  • 87

    Votes: 17 32.7%
  • 89

    Votes: 35 67.3%

  • Total voters
    52

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Wild one

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Midrange 89 of regular 87?

The majority of trucks probably never see 89,and run just fine on 87.If you're tuned or running a few bolt ons then 89 for sure,but a stock truck will run fine on 87
 

CamperMike

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Peoria, IL
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I run 87 octane as the truck runs fine on it. I'm sure I'd get a bit more power on 89 but I don't know if it would be noticeable. I highly doubt any gained fuel economy from 89 would offset the cost.
 

Iiplus

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North Carolina
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89 I Would experience 3 mpg difference on my biweekly drives from NC to Alabama for business
 

Jerrybob

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Manual says it will run on either but 89 is preferred and recommended.
 

Bigskyroadglide

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I run 91 pure gas, or 93 blended. If nothing else is available, I run highest octane sold, pure gas if available.

I travel a lot via truck.

Pure gas gets better fuel economy and my tune is built for 91
 
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