Wrangler Rubicon JLU 3.6 engine pre-detonation

[DanW]

The only name brand by me is Sunoco. I would think they use a better pac?

They do. They are now Top Tier.

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[DanW]

Sams Club also. Costco is now top tier. Thinking about switching my membership just for the gas. Philips 66 is dominant in my area. Unfortunately no Chevron stations near me.

I like Chevron, but they aren't near me, either. A few years back, all the automakers were using Chevron gas with Techron for their emissions testing. I'm not sure if they still are, or not.

 

[islandtees]

They do. They are now Top Tier.

Would that be nation wide or certain areas?

 

[DanW]

Would that be nation wide or certain areas?

It looks like it is nation wide. They are the providers of fuel to Nascar and Indycar, along with all kinds of other racing, so I think they are trying to raise their brand standing. I use their ethanol free 91 octane gas in my boat and UTV, and it is great. I even occasionally run it in my JK. If needed, I won't hesitate to fill my JL with their regular 87, now that they are Top Tier certified.

 

[islandtees]

It looks like it is nation wide. They are the providers of fuel to Nascar and Indycar, along with all kinds of other racing, so I think they are trying to raise their brand standing. I use their ethanol free 91 octane gas in my boat and UTV, and it is great. I even occasionally run it in my JK. If needed, I won't hesitate to fill my JL with their regular 87, now that they are Top Tier certified.

Thanks for the info. I have been putting in 89, but I only use the Jeep on weekends so I don't mind spending a little more.

 

[Biscuit]

They are the providers of fuel to Nascar and Indycar

Sunoco is a NASCAR and IRL sponsor. IOW, Sunoco pays to play. The NASCAR fuel is 15% ethanol. Indy (IRL) cars run on 98% ethanol. NHRA top fuel dragsters burn 90% nitromethane.

I wouldn't mind seeing how someone else's stock Jeep runs on nitro - from a safe distance. The explosion and fireworks might be pretty impressive.

 

[xpsruler]

I've been getting a rattle in mine but cant tell if its engine knock or not. Been running 87 octane top tier. Not the best recording but it can be heard on this audio file.

 

[DanW]

I've been getting a rattle in mine but cant tell if its engine knock or not. Been running 87 octane top tier. Not the best recording but it can be heard on this audio file.

How many miles on it?

 

[xpsruler]

Around 5600

 

[DanW]

Around 5600

Give it an Italian tune up and see if that helps. That might blow any carbon build up out of it. It only takes a very slight amount to contribute to pinging, if that's what is happening. I run mine pretty hard (I just can't help myself) and I'm not hearing any pinging or knock. If that fails, then I'd run a tank of Shell V-Power through it, too. Again, if it is indeed pinging, you won't know if the VPower did the trick until a couple fill ups later. The 93 octane alone will likely stop it. Once you've done these things, after a couple fill ups, re-assess. It is worth a try.

 

[xpsruler]

Thanks. Do I need to worry about any engine damage? I can try to run higher than 87 octane but I've never come across 93. In Colorado our low mid and high is 85, 87, and 91.

 

[DanW]

Thanks. Do I need to worry about any engine damage? I can try to run higher than 87 octane but I've never come across 93. In Colorado our low mid and high is 85, 87, and 91.

By all means, if you think it is something more than just slight pinging, then take it to your dealer and have them look at it. The octane you have there is due to the higher altitude. 91 up there will behave like 93 here at 800 feet above sea level.

 

[Rudedawg]

I have engine pinging as well between 1800 and 2500 when accelerating. 9700kms on it. My dealer seems to be slow to react. Would like to be proactive in dealing with the issue, rather than risking serious damage even though I have warranty.

Bought the vehicle to get me in remote hard to access areas and replaced a Hyundai Santa Fe with a 2018 JLUR after 11 years.

 

[Romato131]

Hi Hau82,

We are terribly sorry to hear that you have this concern with your new JL. Have you brought this to the attention of your dealer? Please send us a PM with your VIN and mileage if you are in need of additional assistance.

Darlene
Jeep Social Care Specialist

I am also having similar issues with my 2018 jeep wrangler jl I have a knocking noise coming from the engine area hear it on top but more from the bottom almost sounds like a bad pully. I got a little closer and you could definitely hear a continuous rapid knocking and noticed one of the lower pully seems wobbly.

 

[Romato131]

I am also having similar issues with my 2018 jeep wrangler jl I have a knocking noise coming from the engine area hear it on top but more from the bottom almost sounds like a bad pully. I got a little closer and you could definitely hear a continuous rapid knocking and noticed one of the lower pully seems wobbly.

So I pick up my jeep from the dealer manager and tech could hear the noise but cant locate it or know what the noise is. So I contacted FCA and opened a case. There was also some clicking noise when I turned left well they found CV shaft but was loose the upper and lower ball joints were loose and the drivers outer tie rode was also loose. All from factory

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