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Discussion Starter · #1 ·
New to the site. Bought a Steel Blue Hemi about 2 months ago and have been alternating 87 and 89 octane. Curious if any Hemi owners have been noticing any downside to using solely 87 octane? Info appreciated.
 

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I have the 4.7 and I asked my dealer if I should run a higher octane every now and then. They said to stay at 87 octane and don't keep switching between octanes. Don't know about the Hemi but im sure it would be the same. I have a hemi in my ram and about once a month i run 89 octane through it with no problems.
 

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I have two hemis and always put 89 in both....why not for a few pennies do things the way the manual says.
 
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