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What gas do you use 87, 89, 93 ?

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Old 07-30-2009, 12:28 PM
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87. I've heard somewhere on here that running higher octane gas for extended periods can actually harm your JK. Although there is not much fact behind the story.

The manual recommends 87.
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Old 07-30-2009, 12:47 PM
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Originally Posted by 4x4jkx

The manual recommends 87.
This is what I follow!
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Old 07-30-2009, 12:52 PM
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Old 07-30-2009, 01:19 PM
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no reason to use anything other than...

87 (or 85 in high elevations)

even says so in the manual.
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Old 07-30-2009, 01:20 PM
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87

gas costs enough
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Old 07-30-2009, 01:28 PM
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87 Octane ARCO
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Old 07-30-2009, 02:16 PM
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91 or 93 for the supercharger
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Old 07-30-2009, 02:52 PM
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anyone know why 85 octane is what works in higher altitude?

originally from chicago, now in CO for a few years and every station carries the previously mentioned grades...
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Old 07-30-2009, 03:39 PM
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Looks like almost everyone, including myself, is running 87/85.

Instead of a list of 87s, let’s have anyone who runs higher than that post why you’re doing so.
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Old 07-30-2009, 08:05 PM
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Originally Posted by bostonMA
Looks like almost everyone, including myself, is running 87/85.

Instead of a list of 87s, let’s have anyone who runs higher than that post why you’re doing so.
It depends on the tune I'm running with my Flashpaq.
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