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EcoDiesel --> MOAB 392: Initial Thoughts

rickinAZ

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The Deal:
I bought both vehicles new. The 2021 Rubicon EcoDiesel was a factory order, and I paid 5% below invoice, which was nearly 11% below MSRP ($60,125). I received $34,500 for the trade-in, which was 65% of what I paid for it and 57% of what I had invested in it after mods. In fact, the "with mods" residual value is actually understated since I had the dealer transfer two high-ticket items (new 37s and ACE rock rails) from the EcoDiesel to the MOAB.

I bought the MOAB on the last day of the month, securing $6,400 off MSRP ($82,755). The dealer didn’t charge me to swap out the 37s and rock rails. I got to keep the MOAB take-off tires (currently listed in this forum’s marketplace), and the dealer covered the cost of putting new 35s on the EcoDiesel. Additionally, I added an 8-year, 60K-mile MOPAR bumper-to-bumper extended warranty for $1,175. Normally, I'm not a fan of extended warranties, but at that price, it was an obvious choice. Tip: It really pays to buy when dealers are pushing to meet their end-of-month quotas. I sent the same email request to six dealers. I was able to negotiate the deal—including the trade—without ever speaking on the phone to any of the dealers or bringing the trade in for inspection until I was ready to take delivery. The dealer pushing window etching was immediately dropped from contention. :)


Driving Impressions:
I was a fan of the EcoDiesel's menacing clattering, but the 392 takes it to another level. I had never heard or even sat in a 392 until the salesperson was doing the post-sale familiarization. When the engine first came to life, I told him that I knew it had a two-mode exhaust and asked how to turn it down. He smiled and replied, “It’s already turned down.”

For those forum members who’d like to see the 5.7 Hemi as an option (me included), I can tell you this: some time back, I owned a Grand Cherokee with the 5.7. Even though the GC was a full thousand pounds lighter, these two vehicles are in completely different power leagues. The 5.7 GC was sedate, whereas the 392 is a barely restrained beast—no PedalMonster required.

I was also pleasantly surprised by the lack of "tip-in softness" in the throttle response in normal driving mode. The OffRoad+ mode acts as a sport setting: it sharpens throttle sensitivity, holds gears longer, and disables the MDS (Multi-Displacement System). Speaking of MDS, my thoughts are a bit mixed. While it does offer nearly 20mpg on city streets at a steady 45mph, it disrupts the exhaust note and engine sound that makes the 392 so fun to drive.


Fuel Mileage:
I’m still on my first tank, but based on my driving patterns, the MOAB is about 10mpg worse than the EcoDiesel. In fact, my EcoDiesel was getting around 22mpg, whereas the Hemi is averaging about 12mpg. I tend to do a lot of short (5-mile) trips around town, with little freeway driving. These short trips were the reason I gave up the EcoDiesel—unfortunately, it was eating the Diesel Particulate Filters (DPFs), even though I loved the powertrain otherwise.


Seat-of-the-Pants Feel:
I mentioned that the MOAB’s power delivery is fierce, but in some ways, I still preferred the EcoDiesel’s. My EcoDiesel was tuned with a PedalMonster and a Bank’s Derringer, which still left it with a 200bhp deficit compared to the MOAB. However, it actually topped the MOAB in low-end torque (500lbft vs 470lbft for the MOAB), but more importantly, the diesel delivered its peak torque just off idle at 1,400rpm.

I’m still breaking in the MOAB, but I'm certain that if you mash the throttle at 10mph on both, the MOAB would leave the EcoDiesel in the dust in terms of acceleration. However, it would do so in a loud, “look at me” kind of way, while the diesel had a smooth, quiet, "hand-of-God pushing you" that felt way faster than it actually was. I always loved that effortless sensation from the EcoDiesel.


Modifications:
Here’s where the MOAB really shines—if you’re not planning on serious off-roading, it’s pretty much ready to go straight from the factory - it's totally loaded. I’ve added some cosmetics (37s and rock rails), as well as adjustable LCAs to improve caster (it came to me measuring at 4.5°), but that's it. The 37s even fit on the OEM spare mount without interfering with the backup warning sensors.

By the way, I’m sure that those wanting to off-road will want a lift, but the 1.5” factory lift accommodates the 37s in every way with absolutely no rubbing—even lock-to-lock.

My license plate frame reads: "No Replacement For Displacement".




Jeep Wrangler JL EcoDiesel --> MOAB 392:   Initial Thoughts MOAB
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2nd 392

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First mod recommended- NoLimitz JL, your lifters, cam, and ears will thank you. Stop the tarnish and deposits build up on the lifters causing the lifters to be out of sync with the resulting Hemi Tick when the oil is shut off to them before it starts.
 
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rickinAZ

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First mod recommended- NoLimitz JL, your lifters, cam, and ears will thank you. Stop the tarnish and deposits build up on the lifters causing the lifters to be out of sync with the resulting Hemi Tick when the oil is shut off to them before it starts.
I totally agree but I'm afraid it would be a handy warranty killer excuse. That's why I like OR+. In fact you're the one who turned me onto it.
 

Odyssey USA

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The Deal:
I bought both vehicles new. The 2021 Rubicon EcoDiesel was a factory order, and I paid 5% below invoice, which was nearly 11% below MSRP ($60,125). I received $34,500 for the trade-in, which was 65% of what I paid for it and 57% of what I had invested in it after mods. In fact, the "with mods" residual value is actually understated since I had the dealer transfer two high-ticket items (new 37s and ACE rock rails) from the EcoDiesel to the MOAB.

I bought the MOAB on the last day of the month, securing $6,400 off MSRP ($82,755). The dealer didn’t charge me to swap out the 37s and rock rails. I got to keep the MOAB take-offs (currently listed in the forum’s marketplace), and the dealer covered the cost of putting new 35s on the EcoDiesel. Additionally, I added an 8-year, 60K-mile MOPAR bumper-to-bumper extended warranty for $1,175. Normally, I'm not a fan of extended warranties, but at that price, it was an obvious choice. Tip: It really pays to buy when dealers are pushing to meet their end-of-month quotas. I sent the same email request to six dealers. I was able to close the deal—including the trade—without ever speaking on the phone or bringing the trade in for inspection until I was ready to take delivery. The dealer pushing window etching was immediately dropped from contention. :)


Driving Impressions:
I was a fan of the EcoDiesel's menacing clattering, but the 392 takes it to another level. I had never heard or even sat in a 392 until the salesperson was doing the post-sale familiarization. When the engine first came to life, I told him that I knew it had a two-mode exhaust and asked how to turn it down. He smiled and replied, “It’s already turned down.”

For those forum members who’d like to see the 5.7 Hemi as an option (me included), I can tell you this: some time back, I owned a Grand Cherokee with the 5.7. Even though it was a full thousand pounds lighter, these two vehicles are in completely different power leagues. The 5.7 GC was sedate, whereas the 392 is a barely restrained beast—no PedalMonster required.

I was also pleasantly surprised by the lack of "tip-in softness" in the throttle response in normal driving mode. The OffRoad+ mode acts as a sport setting: it sharpens throttle sensitivity, holds gears longer, and disables the MDS (Multi-Displacement System). Speaking of MDS, my thoughts are a bit mixed. While it does offer nearly 20mpg on city streets at a steady 45mph, it disrupts the exhaust note and engine sound that makes the 392 so fun to drive.


Fuel Mileage:
I’m still on my first tank, but based on my driving patterns, the MOAB is about 10mpg worse than the EcoDiesel. In fact, my EcoDiesel was getting around 22mpg, whereas the Hemi is averaging about 12mpg. I tend to do a lot of short (5-mile) trips around town, with little freeway driving. These short trips were the reason I gave up the EcoDiesel—unfortunately, it was eating the Diesel Particulate Filters (DPFs), even though I loved the powertrain otherwise.


Seat-of-the-Pants Feel:
I mentioned that the MOAB’s power delivery is fierce, but in some ways, I still preferred the EcoDiesel’s. My EcoDiesel was tuned with a PedalMonster and a Bank’s Derringer, which still gave it a 200bhp deficit compared to the MOAB. However, it actually topped the MOAB in low-end torque (500lbft vs 470lbft for the MOAB), but more importantly, the diesel delivered its torque just off idle at 1,400rpm.

I’m still breaking in the MOAB, but I'm certain that if you mash the throttle at 10mph, the MOAB would leave the EcoDiesel in the dust in terms of acceleration. However, it would do so in a loud, “look at me” kind of way, while the diesel had a smooth, quiet, "hand-of-God pushing you" that felt way faster than it actually was. I always loved that effortless sensation from the EcoDiesel.


Modifications:
Here’s where the MOAB really shines—if you’re not planning on serious off-roading, it’s pretty much ready to go straight from the factory - it's totally loaded. I’ve added some cosmetics (37s and rock rails), as well as adjustable LCAs to improve caster (it came to me measuring at 4.5°), but that's it. The 37s even fit on the OEM spare mount without interfering with the backup warning sensors.

By the way, I’m sure that those wanting to off-road will want a lift, but the 1.5” factory lift accommodates the 37s in every way with absolutely no rubbing—even lock-to-lock.

My license plate frame reads: "No Replacement For Displacement".




MOAB.webp
If I could, that’s the way I’d order it. Color too. If they come out with the 5.7 when I’m ready, I will consider it. Loved my 15 SRT 392 though.
 

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rickinAZ

rickinAZ

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Nice write-up @rickinAZ.

With the 4A transfer Case, the OffRoad+ can be used without out selecting 4H or 4L?
Yes, the OR+ can be engaged in everyday AWD, but it turns off the traction control. I read somewhere that if you engage OR+ and then hold down the traction control button you can have your cake and eat it too. Although, to be honest, the shifts are a little abrupt in OR+ and you have go through the drill every time you start it.

On another subject, so far I'm not a fan of the bigger screen and its complexity. Takes to much attention away from the road to perform functions that were easy in my 2021, but hopefully the learning curve will alleviate that issue.
 

rkybby

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The Deal:
I bought both vehicles new. The 2021 Rubicon EcoDiesel was a factory order, and I paid 5% below invoice, which was nearly 11% below MSRP ($60,125). I received $34,500 for the trade-in, which was 65% of what I paid for it and 57% of what I had invested in it after mods. In fact, the "with mods" residual value is actually understated since I had the dealer transfer two high-ticket items (new 37s and ACE rock rails) from the EcoDiesel to the MOAB.

I bought the MOAB on the last day of the month, securing $6,400 off MSRP ($82,755). The dealer didn’t charge me to swap out the 37s and rock rails. I got to keep the MOAB take-offs (currently listed in this forum’s marketplace), and the dealer covered the cost of putting new 35s on the EcoDiesel. Additionally, I added an 8-year, 60K-mile MOPAR bumper-to-bumper extended warranty for $1,175. Normally, I'm not a fan of extended warranties, but at that price, it was an obvious choice. Tip: It really pays to buy when dealers are pushing to meet their end-of-month quotas. I sent the same email request to six dealers. I was able to close the deal—including the trade—without ever speaking on the phone or bringing the trade in for inspection until I was ready to take delivery. The dealer pushing window etching was immediately dropped from contention. :)


Driving Impressions:
I was a fan of the EcoDiesel's menacing clattering, but the 392 takes it to another level. I had never heard or even sat in a 392 until the salesperson was doing the post-sale familiarization. When the engine first came to life, I told him that I knew it had a two-mode exhaust and asked how to turn it down. He smiled and replied, “It’s already turned down.”

For those forum members who’d like to see the 5.7 Hemi as an option (me included), I can tell you this: some time back, I owned a Grand Cherokee with the 5.7. Even though it was a full thousand pounds lighter, these two vehicles are in completely different power leagues. The 5.7 GC was sedate, whereas the 392 is a barely restrained beast—no PedalMonster required.

I was also pleasantly surprised by the lack of "tip-in softness" in the throttle response in normal driving mode. The OffRoad+ mode acts as a sport setting: it sharpens throttle sensitivity, holds gears longer, and disables the MDS (Multi-Displacement System). Speaking of MDS, my thoughts are a bit mixed. While it does offer nearly 20mpg on city streets at a steady 45mph, it disrupts the exhaust note and engine sound that makes the 392 so fun to drive.


Fuel Mileage:
I’m still on my first tank, but based on my driving patterns, the MOAB is about 10mpg worse than the EcoDiesel. In fact, my EcoDiesel was getting around 22mpg, whereas the Hemi is averaging about 12mpg. I tend to do a lot of short (5-mile) trips around town, with little freeway driving. These short trips were the reason I gave up the EcoDiesel—unfortunately, it was eating the Diesel Particulate Filters (DPFs), even though I loved the powertrain otherwise.


Seat-of-the-Pants Feel:
I mentioned that the MOAB’s power delivery is fierce, but in some ways, I still preferred the EcoDiesel’s. My EcoDiesel was tuned with a PedalMonster and a Bank’s Derringer, which still gave it a 200bhp deficit compared to the MOAB. However, it actually topped the MOAB in low-end torque (500lbft vs 470lbft for the MOAB), but more importantly, the diesel delivered its torque just off idle at 1,400rpm.

I’m still breaking in the MOAB, but I'm certain that if you mash the throttle at 10mph, the MOAB would leave the EcoDiesel in the dust in terms of acceleration. However, it would do so in a loud, “look at me” kind of way, while the diesel had a smooth, quiet, "hand-of-God pushing you" that felt way faster than it actually was. I always loved that effortless sensation from the EcoDiesel.


Modifications:
Here’s where the MOAB really shines—if you’re not planning on serious off-roading, it’s pretty much ready to go straight from the factory - it's totally loaded. I’ve added some cosmetics (37s and rock rails), as well as adjustable LCAs to improve caster (it came to me measuring at 4.5°), but that's it. The 37s even fit on the OEM spare mount without interfering with the backup warning sensors.

By the way, I’m sure that those wanting to off-road will want a lift, but the 1.5” factory lift accommodates the 37s in every way with absolutely no rubbing—even lock-to-lock.

My license plate frame reads: "No Replacement For Displacement".




MOAB.webp
Gorgeous Jeep and great write-up.

I love the color, and getting the dealership to swap over your favorite parts definitely had to sweeten the deal. I just got a 3.0L last month and I'm already in love with the powertrain. GDE tune is going to get done in the spring, along with a 2.5" lift and some 35s.
 

2nd 392

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I totally agree but I'm afraid it would be a handy warranty killer excuse. That's why I like OR+. In fact you're the one who turned me onto it.
Dealer install when the new PCM was installed. Checked it and the Banks PM for codes and footprints in case removal for warranty purposes was needed, there were none. All at NC because he couldn’t get MDS to disable in OR+ on my 21. Turn it off before visits if worried .. “can’t be detected by dealer tools“ confirmed, no worries.
 

Rob_R

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On another subject, so far I'm not a fan of the bigger screen and its complexity. Takes to much attention away from the road to perform functions that were easy in my 2021, but hopefully the learning curve will alleviate that issue.
Agree 100% with this statement. I have the 12" display in my 24 Power Wagon and when compared to the 8.4" display in my Gladiator, I find the tasks much more difficult to do on the 12" display.

Congratulations on the Moab purchase. I am looking forward to my Moab order being delivered in late Feb.
 

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The Deal:
I bought both vehicles new. The 2021 Rubicon EcoDiesel was a factory order, and I paid 5% below invoice, which was nearly 11% below MSRP ($60,125). I received $34,500 for the trade-in, which was 65% of what I paid for it and 57% of what I had invested in it after mods. In fact, the "with mods" residual value is actually understated since I had the dealer transfer two high-ticket items (new 37s and ACE rock rails) from the EcoDiesel to the MOAB.

I bought the MOAB on the last day of the month, securing $6,400 off MSRP ($82,755). The dealer didn’t charge me to swap out the 37s and rock rails. I got to keep the MOAB take-offs (currently listed in this forum’s marketplace), and the dealer covered the cost of putting new 35s on the EcoDiesel. Additionally, I added an 8-year, 60K-mile MOPAR bumper-to-bumper extended warranty for $1,175. Normally, I'm not a fan of extended warranties, but at that price, it was an obvious choice. Tip: It really pays to buy when dealers are pushing to meet their end-of-month quotas. I sent the same email request to six dealers. I was able to close the deal—including the trade—without ever speaking on the phone or bringing the trade in for inspection until I was ready to take delivery. The dealer pushing window etching was immediately dropped from contention. :)


Driving Impressions:
I was a fan of the EcoDiesel's menacing clattering, but the 392 takes it to another level. I had never heard or even sat in a 392 until the salesperson was doing the post-sale familiarization. When the engine first came to life, I told him that I knew it had a two-mode exhaust and asked how to turn it down. He smiled and replied, “It’s already turned down.”

For those forum members who’d like to see the 5.7 Hemi as an option (me included), I can tell you this: some time back, I owned a Grand Cherokee with the 5.7. Even though it was a full thousand pounds lighter, these two vehicles are in completely different power leagues. The 5.7 GC was sedate, whereas the 392 is a barely restrained beast—no PedalMonster required.

I was also pleasantly surprised by the lack of "tip-in softness" in the throttle response in normal driving mode. The OffRoad+ mode acts as a sport setting: it sharpens throttle sensitivity, holds gears longer, and disables the MDS (Multi-Displacement System). Speaking of MDS, my thoughts are a bit mixed. While it does offer nearly 20mpg on city streets at a steady 45mph, it disrupts the exhaust note and engine sound that makes the 392 so fun to drive.


Fuel Mileage:
I’m still on my first tank, but based on my driving patterns, the MOAB is about 10mpg worse than the EcoDiesel. In fact, my EcoDiesel was getting around 22mpg, whereas the Hemi is averaging about 12mpg. I tend to do a lot of short (5-mile) trips around town, with little freeway driving. These short trips were the reason I gave up the EcoDiesel—unfortunately, it was eating the Diesel Particulate Filters (DPFs), even though I loved the powertrain otherwise.


Seat-of-the-Pants Feel:
I mentioned that the MOAB’s power delivery is fierce, but in some ways, I still preferred the EcoDiesel’s. My EcoDiesel was tuned with a PedalMonster and a Bank’s Derringer, which still gave it a 200bhp deficit compared to the MOAB. However, it actually topped the MOAB in low-end torque (500lbft vs 470lbft for the MOAB), but more importantly, the diesel delivered its torque just off idle at 1,400rpm.

I’m still breaking in the MOAB, but I'm certain that if you mash the throttle at 10mph, the MOAB would leave the EcoDiesel in the dust in terms of acceleration. However, it would do so in a loud, “look at me” kind of way, while the diesel had a smooth, quiet, "hand-of-God pushing you" that felt way faster than it actually was. I always loved that effortless sensation from the EcoDiesel.


Modifications:
Here’s where the MOAB really shines—if you’re not planning on serious off-roading, it’s pretty much ready to go straight from the factory - it's totally loaded. I’ve added some cosmetics (37s and rock rails), as well as adjustable LCAs to improve caster (it came to me measuring at 4.5°), but that's it. The 37s even fit on the OEM spare mount without interfering with the backup warning sensors.

By the way, I’m sure that those wanting to off-road will want a lift, but the 1.5” factory lift accommodates the 37s in every way with absolutely no rubbing—even lock-to-lock.

My license plate frame reads: "No Replacement For Displacement".

Not sure if you write for a living but you should consider it if you don't. This was really well written and i enjoyed reading it. Im sad to see the eco diesel go. I would have loved to see it become the motor used for their hybrid platforms. Torque monster and always there


MOAB.webp
 

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Moses212

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Interesting that they transfered your 37s and sold you the upgraded warranty at the same time. Did anything come up warranty & 37s?
 
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rickinAZ

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Interesting that they transfered your 37s and sold you the upgraded warranty at the same time. Did anything come up warranty & 37s?
They expressed no concern about the 37s impacting the warranty if that was your question. But, I suspect that if I tried to warranty worn ball joints it would come up 😀
 

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Very nice! Great color too.

12 mpg city sounds right. Highway is probably 15-18 mpg depending.
 

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I dont have the attention span to read all of that. They get horrible mileage and are awesome.

Jeep Wrangler JL EcoDiesel --> MOAB 392:   Initial Thoughts {filename}
 

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First mod recommended- NoLimitz JL, your lifters, cam, and ears will thank you. Stop the tarnish and deposits build up on the lifters causing the lifters to be out of sync with the resulting Hemi Tick when the oil is shut off to them before it starts.
I just got my new 2026 Moab 392. Installed nolimitz and turned off MDS (drone), and turned on sport mode. It now drives and sounds like a 6.4 V8 should!

Sport mode is a nice feature. Doesn't seem to change shift points just throttle response I think. I can still go into off road+ for that which is fun but I don't think I would like it 100% full time.

Not concerned about warranty. Very easy to remove before going in for service.

I have had many Jeeps. This is the best by far.
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