BEWARE: 392 Engine warranty denied at 2,100 miles by Jeep/Stellantis

Boo392

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Joined
Nov 26, 2025
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Location
Utah
Current Rides
2023 Jeep Rubicon 392
I purchased a new Jeep Wrangler Rubicon 392 in May of 2023. Woot woot! This was strictly a recreational vehicle, and not my daily driver, so it only had 2,100 miles on it by April of 2025. That is when tragedy struck, the motor straight seized up! No problem right, it is still under warranty and only has a handful of miles on it. I took it to Heritage CDJR of Logan where I bought it for warranty work. After months of run around, and the Jeep sitting outside, I was told that Jeep refused to cover it because I did not have "service records" showing that the oil changed every 6 months. Surely this must be a mistake right? Vehicles sit on the dealer lot all the time for extended periods of time and there is no policy from Jeep to change the oil when purchased. I called Jeep Customer Care who told me that they dealer had placed the restriction on the Jeep and they were the only ones who could remove it. I went back and forth between Jeep Customer Care and Heritage who kept pointing fingers at each other. Infuriating. Finally Jeep Customer Care suggested that I take it to another dealership and they should be able to lift the restriction. I should point out that the restriction they are referring to is over the ENTIRE Jeep. Any warranty work that needs done to this vehicle from here forward will face strict scrutiny from Jeep because I didn't change the oil every 6 months. Yep, if the dash goes out, or the window won't roll up, the warranty is flagged by Jeep for additional review.
I ended up putting the Jeep on to a trailer and driving it 100 miles to Larry H Miller Jeep in Sandy. The service team at LHM said that they would work with Ryan Lamb, the area manager for Stellantis, to see what they could do. Perfect, finally we are working with a live person in customer support and retention. LHM eventually told me that Jeep still refused to do anything on the warranty so I asked for a conference call with Ryan Lamb to explain the situation. It did not go at all as I had imagined. As soon as the point was brought up that Jeep dealers are selling vehicles with "expired oil", by their own standards, Ryan became aggressive and audibly upset to the point that he was yelling over me trying to speak. He could not, or would not, answer why customers are being held to a higher standard than dealers. In fact he was so agitated that he ended the call abruptly. Wow!
I'm still searching for the answer to my question as customers are buying vehicles with expire oil, or nearly expired oil, every day by Jeeps definitions. Since the call I have tried reaching out to Jeep Customer Care who will only send me to Ryan, not his superior, and Ryan will not return my calls. I have also tried talking to Jon Weece - owner of Heritage Auto to see if he could move me up the food chain so I could discuss Ryan's behavior and ask the unanswered question - so far no luck. I have also tried reaching out to Ryan directly who has blocked me. You can reach Ryan Lamb,Metro Area Manager at Stellantis, on LinkedIn.

I realize that the warranty is voided by my inaction. That is not the point of this post. The point of this post is:

1 - Help others from making the same mistake.
2 - Get an answer to why Jeep is selling vehicles with "expired oil", by their own definition, and holding their customers to a higher standard for oil changes than they are their dealerships?

In the end, I had to replace the 392 engine and am still without my Jeep 7 months later as the dealer has yet to get it running. If anyone has any other contacts at Jeep/Stellantis, or ideas on how to get this question answered, I would love to hear from you.

Thanks for coming to my Ted Rant.
 
Sorry about your predicament. That’s gotta suck.
Just curious though. Did you change the oil and filter at all during your time of ownership?
 
Wow! Sorry to hear that this happened to you, what a nightmare. I do know that the Jeep app allows you to record oil and filter changes along with the mileage and date of when it was done. I change mine often and record the service in the app religiously.
 
The funniest part is Jeep trying to convince anyone that full synthetic oil is expired after sitting in a vehicle for a mere 6 months.
 
The funniest part is Jeep trying to convince anyone that full synthetic oil is expired after sitting in a vehicle for a mere 6 months.
That’s the point of this thread. If the oil sits in a vehicle far 2 to 3 years there is zero policy to change the oil when it is sold to the customer. However, if it sits in a customers temperature controlled garage for 6 months and 1 day, it is expired and the customer is liable.
 
Wow! Sorry to hear that this happened to you, what a nightmare. I do know that the Jeep app allows you to record oil and filter changes along with the mileage and date of when it was done. I change mine often and record the service in the app religiously.
Well played!

This post is only to point out that during this process I found out that Jeep is selling “expired” oil, by their own standards, to their customers every day. If it is on a dealerships lot it can sit for years without being changed but the minute a customer buys it the oil must be changed every 6 months or the oil is considered “expired” and the warranty is void.
 
Sorry about your predicament. That’s gotta suck.
Just curious though. Did you change the oil and filter at all during your time of ownership?
Hey Ray,

No, I did not ever change the oil or filter in the 23 months that I owned it before it imploded.

I’m not here to argue the warranty policy. I take full responsibility for not following that. I am here to point out that if this Jeep had sat on the dealers lot for those 23 months that it would have been sold without the oil being changed and still considered fresh. However, the minute a customer buys the Jeep, and puts it in their garage, the oil is considered “expired” after 6 months regardless of the mileage and all warranties are voided.
 
I would look for a good lawyer. It is ludicrous that a 2100 miles engine would seize and Jeep wouldn’t honor the warranty. Unless the oil turned to sludge, or it was bone dry, this isn’t normal and shouldn’t have happened.
 
What are the techs saying caused the motor to implode? Lack of lubrication?
All I have are the dealer notes that say:

Engine previoulsy locked up. Diagnosed at another dealership. Removed oil pan. Found engine failure due to rod and rod bearing failure.

The motor was sent away by Larry H. Miller Jeep before in had a chance to have it analyzed.
 
I would look for a good lawyer. It is ludicrous that a 2100 miles engine would seize and Jeep wouldn’t honor the warranty. Unless the oil turned to sludge, or it was bone dry, this isn’t normal and shouldn’t have happened.
I’m sure that Jeep would do exactly what Ryan Lamb at Stellantis did, which is point out that the warranty is only in place if the oil is changed every 6 months, regardless of mileage.

What I would like for a lawyer to drill down on is why oil can sit on a dealers lot for years and be considered fresh enough to sell to the costumer but once a customer has it the oil is only good for 6 months and then is “expired”.

Why isn’t what is good for the goose, good for the gander?
 
Ryan can say whatever he wants regarding the warranty. He most likely gets paid to do just that. A lawyer might disagree with how he reads and interprets the warranty. My 2 cents is that a 2000 miles engine should not under any circumstances seize because of an “old oil”, assuming the engine had proper oil in it.

Anyway, good luck and thanks for the warnings.
 
BTW, you can write an email and or certified letter to the Stellantis executives, both global and NA, and share your story with them. CC your State’s GA and Chamber of Commerce. I did that (different company) and it worked miracles.
 
Hey Ray,

No, I did not ever change the oil or filter in the 23 months that I owned it before it imploded.

I’m not here to argue the warranty policy. I take full responsibility for not following that. I am here to point out that if this Jeep had sat on the dealers lot for those 23 months that it would have been sold without the oil being changed and still considered fresh. However, the minute a customer buys the Jeep, and puts it in their garage, the oil is considered “expired” after 6 months regardless of the mileage and all warranties are voided.
u cant be serious u did not change the oil for 23 months ,u cant fix stupid,i would not cover it either. the oil does not sit in the dealerships lot for years. they service them, u r trying to justify youre stupity ,by saying they dont change the oil,well when is the last time someone drove a 392 off the lot and the engine seized, then u try another angle to get it fixed ,with someone being rude to u from jeep ,and that did not work. anyone that goes 23 months without an oil change gets what the deserve.
 
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u cant be serious u did not change the oil for 23 months ,u cant fix stupid,i would not cover it either. the oil does not sit in the dealerships lot for years. they service them, u r trying to justify youre stupity ,by saying they dont change the oil,well when is the last time someone drove a 392 off the lot and the engine seized, then u try another angle to get it fixed ,with someone being rude to u from jeep ,and that did not work. anyone that goes 23 months without an oil change gets what the deserve.
Wow, we just found that relative at the Thanksgiving dinner table.
 
So, what is it that causes the need to change the oil every 6 mo?

To the OP, I am so sorry that you are going through this. I can only imagine. Thank you for your post. This has me thinking about the leftover 2024 and 2025 392s that have been sitting.
 
So, what is it that causes the need to change the oil every 6 mo?

To the OP, I am so sorry that you are going through this. I can only imagine. Thank you for your post. This has me thinking about the leftover 2024 and 2025 392s that have been sitting.
forget the every 6 months ,he did not change it for almost 2 years
 
So, what is it that causes the need to change the oil every 6 mo?

According to AI here's the breakdown:

1. Oil degrades on the calendar whether you drive it or not
This is true for every modern engine, not just the 392. Oxidation, moisture absorption, acid buildup, additive depletion, and fuel/condensation contamination all happen over time even if the Jeep just sits in your garage. Synthetic oil resists it better than conventional, but it still degrades. Virtually all manufacturers now include a time limit (6 months or 12 months) precisely because of this. The 392 simply uses the more conservative 6-month cap.

2. The 6.4L 392 HEMI is a high-performance SRT engine, not a "truck" or "normal" HEMI
- It makes 470–485 hp with a much more aggressive cam, higher compression, and runs significantly hotter and with higher cylinder pressures than the 5.7L or truck-spec 6.4L.
- It is built to the same oil spec as Hellcats, Redeyes, Demons, etc.—all of which carry the exact same "6 months/6,000 miles max" rule.
- These engines are known to be harder on oil (higher shear, more heat, sodium-filled exhaust valves, etc.). Degraded oil has been directly linked to the cam/lifter failures that have plagued late-model HEMIs. Stellantis shortened the interval specifically to reduce those failures in the high-output variants.

3. Compare to truly "normal" Jeep engines
- 3.6L Pentastar → 10,000 miles or 12 months
- 5.7L HEMI (non-392) → 6,000–8,000 miles or 12 months in most cases
- 6.4L 392 → explicitly 6 months (no "or 12 months" option)

The 392 is deliberately held to the stricter SRT/HEMI performance schedule, not the standard Jeep schedule.

4. Warranty reality
Yes, Stellantis is strict about it for warranty protection, but they’re strict because bad oil has actually caused expensive failures in these engines. They’re not just being arbitrary—they’ve seen the repair bills.

Bottom line: The 6-month rule exists primarily to keep the oil fresh enough for a high-strung 470+ hp engine that is known to punish old oil. The fact that it’s “just a V8” is irrelevant—these are not 1990s pushrod small-blocks running 5W-30 dino oil. This is a modern high-output HEMI that will eat its cam/lifters if you let the oil go bad, and Stellantis knows it.

Most 392 owners who baby their Jeeps and drive <5k miles a year still change it every 5–6 months and consider it cheap insurance.
 
That is an awesome write up @Excaliburitto , thank you. It should be part of every Hemi sales paperwork package. I'm going next week for my 3 week 1,000 mile oil change. 😂 I'm a big proponent of a 1,000 mile oil change.
 
BTW, you can write an email and or certified letter to the Stellantis executives, both global and NA, and share your story with them. CC your State’s GA and Chamber of Commerce. I did that (different company) and it worked miracles.
Great idea, thanks for the information, will do.
 

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