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Old 01-13-2013, 02:03 AM
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Re: 87 vs 89 octane for hemi v8 5.7

Running 87, generally fill up at costco. No issues.
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Old 01-13-2013, 02:42 AM
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Re: 87 vs 89 octane for hemi v8 5.7

So "89 recommended" is the "official" octane listed by Jeep?

I ask because I was at the dealer looking at a 2013 hemi V8 last week and one sales rep said "89" then next sales rep 10 min later said "87" and after proudly opening the gas cap cover door, "see there's no higher octane fuel sticker by the gas cap....uses regular."
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Old 01-13-2013, 03:09 PM
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Re: 87 vs 89 octane for hemi v8 5.7

Manual says vehicle with 5.7 hemi will meet all emission and performance requirements with 87 or 89 then states manufacturer recommends 89. I use 89 but don't know if it makes a difference.
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