What Octane Gas Are You Going To Put In Your JL?

What octane gas are you planning on running in your JL?


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word302

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There are many reports of the JL 3.6 having predetonation issues with lower octane. Several threads about it here. There's no fix from FCA. They say it's the normal and the dealers are useless.
Pre-detonation is not a thing. Detonation and pre ignition are two very different things. What do you mean when you say "many reports"?
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DrDee

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I have two. One is a “Quick Reference Guide” and has about 20 pages, the other is a “User Guide” with 297 pages.
I hope this helps.
I only received the quick reference guide in the glovebox. I’ve emailed my dealership-where I purchased and chatted on FCA-who will mail out one....remains to be seen, the original lady never sent it to me, since September 7! Poor customer service :swear:
 

higbyz

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Always the highest octane!

It's only a couple of bucks difference. It's what your engine uses to run. It's the heart and soul of how your rig runs.

Dont be cheap!
My 2.0 gets better mileage on 91octane non ethanol than 93 with. 91=$3.09 ........93=$3.23
 

Johnbuz

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There are many reports of the JL 3.6 having predetonation issues with lower octane. Several threads about it here. There's no fix from FCA. They say it's the normal and the dealers are useless.
Pre-detonation is not a thing. Detonation and pre ignition are two very different things. What do you mean when you say "many reports"?
https://www.jlwranglerforums.com/forum/threads/predetonation-spark-knock.12267/
https://www.jlwranglerforums.com/forum/threads/is-93-octane-premium-gas-okay.38743/
 

word302

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