Eco diesel or 3.6 gas??

[AXISJT]

Thats definitely a factor. Gone are the days of buying a diesel because it’s more cost effective. I drive ~25k a year and don’t expect my diesel to ever offset the added costs of $4k upcharge plus $80 fuel filters, $200 oil changes (DIY), regular def, etc. I bought mine purely because of the enjoyment of driving it and the range. I get 475 miles of usable range (DTE typically reads 515) on my stock sport s. Recently switched to a full rubicon suspension, rubicon takeoff tires, a rooftop tent and still get a usable range of 410 miles with a DTE of 450. Range was a huge factor for me

You are paying way to much for fuel and oil filters buy them from docs diesel

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[Almost]

Agree, I got mopar filters from diesel filters online for like $40-45 and that was oil and fuel filters. Cost me $120 to do an oil change with Pennzoil which was about $80 for two jugs.

 

[alpineovernappa]

You are paying way to much for fuel and oil filters buy them from docs diesel

I will when I’m outside of warranty but stellantis is notoriously stingy with warranty claims so I don’t want to give them any reason to deny me in the event of an issue, especially as pertains to the cp4. Until then I’ll pay the extra for mopar parts

 

[Gvsukids]

That makes a lot more sense. My JK was a 6 speed. It was a 3.8l and a rubicon so it needed the 6 speed and 4.10s to get out of its own way when I moved to CO. I had to put a CAI and superchips tuner on it and run the 93 octane tune (ran fine on 91) for it to be livable there.

I get what you are saying though. My Canyon was also a 3.6l/8at and I miss the power. It was several hundred lbs lighter and 308hp. 0-60 in 6.1 sec bone stock. It was fun to pass people. It pulled hard to the 7200. RPM rev limiter.

I wasn't winning any drag races at the dunes on Saturday.

 

[Pescatoral Pursuit]

First time Jeep owner. I HAD to have a diesel. After driving it for 8 months I can tell you:
It doesn't get near the manufacturer's stated mpg.
Most of the time it felt as if it was running in a "detuned" state where full power could not be realized.

I rented a similarly modified 3.6 Wrangler for over a week recently and it matched the MPG numbers my diesel gladdy gets: just under 20.
Acceleration is not as bad as its underserved reputation.

I can't speak to towing capabilities with either.

If you want consistent max power and better than 10-15 MPGs get the diesel and get it tuned.
If you want a respectable driving/ mpg Jeep, get the gas and invest your savings.

 

[@californiajeeping]

You will find people that dont own diesel JT's complain about their reliability and cost.

You will find very few of us who moved from gas to diesel complaining about anything.

It really does feel like you have twice the horsepower at all times. Really you have significantly more torque at a lower rpm. The 3.6L lives above 4k most of its life or the dang thing doesnt move. The diesel builds some boost and takes off at 2k rpm.

 

[Jeepasaurus_Rex]

I've got 60k miles driving the eco diesel, and I've loved all of it. Never had any issues with filters, pumps or anything messing up or going bad. We all have different experiences of course. I'd buy another one, no questions asked.

The DEF thing really isn't that bad. $15 or so for a 2.5gal box that takes about 2 minutes to fill up. No big deal. I usually need the break from driving anyway.

 

[AXISJT]

First time Jeep owner. I HAD to have a diesel. After driving it for 8 months I can tell you:
It doesn't get near the manufacturer's stated mpg.
Most of the time it felt as if it was running in a "detuned" state where full power could not be realized.

I rented a similarly modified 3.6 Wrangler for over a week recently and it matched the MPG numbers my diesel gladdy gets: just under 20.
Acceleration is not as bad as its underserved reputation.

I can't speak to towing capabilities with either.

If you want consistent max power and better than 10-15 MPGs get the diesel and get it tuned.
If you want a respectable driving/ mpg Jeep, get the gas and invest your savings.

Thats honestly not normal. my stock eco D my average was 29 to 30 mpg now with 38s a bed rack and awning and a tent my average is 24 mpg. I don't think i could ask for better when it comes to mpg

 

[@californiajeeping]

Thats honestly not normal. my stock eco D my average was 29 to 30 mpg now with 38s a bed rack and awning and a tent my average is 24 mpg. I don't think i could ask for better when it comes to mpg

Terrain and speed at which people drive is 100% the MPG detractor. Different engines in different locations will vary wildly. My gas max tow got an average of 14.5mpg. The diesel in same terrain/drives is 23.0 or 22.9mpg. I verify the dash by hand calculating.

On completely flat ground in reno at 65mph max the gas jeep would get nearly 24MPG consistently. soon as there was a hill or I drove 75-80 it TANKED. The diesel is more resilient.

I drive very fast and live in the mountains and average 23mpg stock 2022 sport s ecodiesel. On the flat it goes up to 24.5 or so at 80mph.

 

[Scott Andrews]

I test drove the Eco diesel for the first time last week. I was impressed with it but is it worth the added price and the extra costs associated with the higher cost of diesel, def fluid, and most importantly, reliability. Reliability is the big one with me. For the folks with the newest version, how has it been holding up??

Hey, I am not a Jeep owner, but I just bought a 2022 Ram 1500 Crew Cab Longhorn with the Ecodiesel and I LOVE it. I have had Hemi Rams in the past, but the Ecodiesel gets about 40% better fuel economy, tows MUCH better (no more 4800 RPM "screams" up a big hill with 8K pounds behind it. Just chug, chug 3K and no problems), and great performance. I can tell a small 0-60 difference, but I have the 3.92 rear gear, so that helps. I also had the 3.92 in my Hemi Ram and it was quick but I only got about 14 mpg overall. Now, I get 25-27 mpg overall, but admittedly I live out on the country and most of my driving is highway or back rounds with little to no traffic. Anyway, I have had no cooling or reliability issues of any sort, even towing 8K+ pounds on a 95 degree Fahrenheit day. I have about 10K trouble free miles. One more thing about the 0-60 performance: with a 3.92 gear like I have, the Hemi does it in 6.6s and the Ecodiesel is 7 6s. So, you "lose" a second but you gain so much more: the feeling of 480 lb-ft of torque, great fuel economy, quietness and refinement, great sounds, great towing, great reliability, and smoothness. Thus truck is so smooth and refined and it has more torque than most big block gas engines, so it FEELS great. I detect very little to no turbo lag and, if that does end up bothering you, a Banks Power Monster throttle commander will fix you up! I hope this helps. Buy the Ecodiesel! You won't be sorry!

 

[Scott Andrews]

Thats honestly not normal. my stock eco D my average was 29 to 30 mpg now with 38s a bed rack and awning and a tent my average is 24 mpg. I don't think i could ask for better when it comes to mpg

I agree. Something wasn't right with his Ecodiesel Jeep or he's not figuring the fuel economy correctly--- or he has a VERY heavy foot. Like any gas motor, a diesel will get less fuel economy if you drive it like you stole it. All ICE will.

 

[NC_Overland]

Hey, I am not a Jeep owner, but I just bought a 2022 Ram 1500 Crew Cab Longhorn with the Ecodiesel and I LOVE it. I have had Hemi Rams in the past, but the Ecodiesel gets about 40% better fuel economy, tows MUCH better (no more 4800 RPM "screams" up a big hill with 8K pounds behind it. Just chug, chug 3K and no problems), and great performance. I can tell a small 0-60 difference, but I have the 3.92 rear gear, so that helps. I also had the 3.92 in my Hemi Ram and it was quick but I only got about 14 mpg overall. Now, I get 25-27 mpg overall, but admittedly I live out on the country and most of my driving is highway or back rounds with little to no traffic. Anyway, I have had no cooling or reliability issues of any sort, even towing 8K+ pounds on a 95 degree Fahrenheit day. I have about 10K trouble free miles. One more thing about the 0-60 performance: with a 3.92 gear like I have, the Hemi does it in 6.6s and the Ecodiesel is 7 6s. So, you "lose" a second but you gain so much more: the feeling of 480 lb-ft of torque, great fuel economy, quietness and refinement, great sounds, great towing, great reliability, and smoothness. Thus truck is so smooth and refined and it has more torque than most big block gas engines, so it FEELS great. I detect very little to no turbo lag and, if that does end up bothering you, a Banks Power Monster throttle commander will fix you up! I hope this helps. Buy the Ecodiesel! You won't be sorry!

The Ram 1500s don’t have the issues that it does in the Jeep. The Ram has room for a proper cooling system and a large enough grill opening for proper air flow.

 

[Pescatoral Pursuit]

Terrain and speed at which people drive is 100% the MPG detractor.

My diesel JT is driven on flat terrain with a light foot.
The gas JL was in hilly AZ with a light foot.
Both KO2s at about 40#, factory gearing.

My results are not that unusual once you start looking around to what others are posting.

I think however I may have to test drive a diesel from a local dealership just to see for myself. I drove mine off the lot w 5 miles on the odometer and had the tires swapped to 37s before 70 miles, but I do recall for that little bit I was averaging 22 on mostly hwy miles with the factory falkens.

I caught a blip on a YouTube video where it said the FAD was for fuel mileage savings. I wonder if the bugaboo is in that?
There seems to be two different groups of diesel JT owners: those that can modify their Jeeps any which way and still get over 25 MPG, and those who struggle to get 20.
I'm not yet convinced that the other group isn't prevaricating to make themselves feel better about their choice.

I agree. Something wasn't right with his Ecodiesel Jeep or he's not figuring the fuel economy correctly--- or he has a VERY heavy foot. Like any gas motor, a diesel will get less fuel economy if you drive it like you stole it. All ICE will.

My last vehicle was an '06 f150 that I drove off the lot new and put 281,000 mi on the notorious Triton 5.4 with no engine work and it still runs great. I drive my vehicles like I want them to last forever while getting the best mileage they possibly can, in flat Florida. The way I drive is not the issue and I'm not the only one getting substandard fuel mileage from my EcoDiesel JT.
I have been hand calculating every tank of gas, as a matter of habit since I bought my last truck new, and consistent with other reports, hand calculations are typically less than what the Jeep shows by about 1½ MPGs.

 

[BlueScapegoat]

I caught a blip on a YouTube video where it said the FAD was for fuel mileage savings. I wonder if the bugaboo is in that?

The difference the FAD makes is measured in tenths. Just another point of failure IMO, wish they didn't have them. They've been a thing on-and-off since forever.

 

[CivilJeep]

The difference the FAD makes is measured in tenths. Just another point of failure IMO, wish they didn't have them. They've been a thing on-and-off since forever.

First, I want to say that I'm not disagreeing with you, the FAD is definitely another point of failure, and not a benefit on an individual level.

Out of curiosity, I made some assumptions and ran some rough numbers. Here we go;

Let's say the average JL/JT lifespan is 100k miles, and it averages 15.0 mpg without FAD. During this average lifespan, these jeeps will use 6,667 gallons of fuel.

Same assumptions, but with the addition of FAD, these JL/JT's get 15.1 mpg. During this average lifespan, these jeeps will use 6,622 gallons of fuel. So the FAD at 0.1 mpg saves each Jeep about 45 gallons of fuel over it's lifetime.

For the 2021 model year, Jeep produced about 300k JL/JT's. So for the 2021 model year, the addition of FAD saves 13,500,000 gallons of fuel.

If the gallon of fuel averages $3.00 over this period, that is $40,500,000 spent on something besides wasted fuel.

This isn't to argue for or against FAD, I just think the numbers are interesting!

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