Official EPA Fuel Economy For 2020 Jeep Wrangler Ecodiesel: 22/29/25 MPG

[James]

I don't care if it has a lifetime higher cost. I would not be getting a diesel to save money. It is all about range. I want to increase my backcountry range as much as possible. The diesel does that. Add an AUX tank, maybe a large OEM tank replacement, and the range would cover just about anything in the lower 48. Then, as I'm sure someone will say, just add Jerry Cans. Yep, and thus increase my diesel range even further.

Just waiting on the official real world owner driven reviews and the availability in the JT.

I have one on order, I currently have a 2018 JLUR on 37” and only getting around 15mpg on the fwy.
The diesel extra range for my off road trips should be amazing.
Once mine gets here it will get a lift, 37” and weighted down with all of my overland gear. My thoughts are it should get around 25mpg loaded down.

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[irishtim7]

How about a diesel powered J6? Auto or manual, what a grocery getter!

I'd be all over that. Would be my new daily.

 

[The_Phew]

Good luck to anyone that buys one of these. Sticking a problem-plagued Italian diesel into a FCA-engineered vehicle that has to be CA emissions compliant sounds like a disaster waiting to happen. I had a Touareg TDI, so I can see the appeal of monster torque+range, but modern diesel emissions systems just aren't build for short drives. Even though my VW's DEF system was usually 'cheating' itself off, it was still frequently in regen mode burning off the soot in the particulate filter.

You'll quickly discover that all of the benefits of the diesel powertrain go out the window during regen; torque plummets and fuel consumption soars. If that happens while you are trying to traverse difficult terrain, it could be downright dangerous. Not to mention that all those sensors in the emissions system are constantly breaking due to soot buildup, potentially putting your vehicle into 'limp mode' at the worst time.

Guise, the writing is on the wall with this one. Don't say you weren't warned!

 

[JP18]

I have one on order, I currently have a 2018 JLUR on 37” and only getting around 15mpg on the fwy.
The diesel extra range for my off road trips should be amazing.
Once mine gets here it will get a lift, 37” and weighted down with all of my overland gear. My thoughts are it should get around 25mpg loaded down.

That's unrealistic. My Grand Cherokee with the nearly identical 3.0 Ecodiesel barely gets 25 mpg unladden.

JP18

 

[DaltonGang]

The problem is when you get to around 80K miles and it starts to tank and have all sorts of EGR/PF issues. ...

That is why there are "Delete Kits" being sold and installed on US Spec diesels. They help wake up the diesel engines, improve their reliability, increase longevity, and greatly improve mpg.

..

 

[The_Phew]

That is why there are "Delete Kits" being sold and installed on US Spec diesels. They help wake up the diesel engines, improve their reliability, increase longevity, and greatly improve mpg.

Then you'll find yourself sucking soot any time you are 'wheelin'. Diesel soot is a carcinogen, not to mention just being nasty to smell/breathe. Although particulates from DI gas engines are potentially even more dangerous, and the U.S.-spec 2.0L has no particulate filter.

The 3.6, being port-injected, is actually fine in terms of particulate emissions. As is the diesel, assuming you haven't ripped out the DPF!

You could just start smoking two packs a day, then you could be pretty sure the cigs would kill you before your DPF-deleted diesel Wrangler would.

 

[TCogs1]

Is it worth trading in the 3.6l? Getting 18mpg currently. I'm about to lift and put 37's on the Rubi but the diesel would turn them so much better.... decisions decisions.

I am in the same boat... 30mpg is tempting .. my 3.6 gets 17mpg with stock tires, and 13mpg with my 37" maxxis creepy crawlers... So as soon as I can understand 0-60 numbers and mpg with 37" then I can decide..

Evne with those good torque numbers, Im not really confident the 3.0 will move any quicker 0-60... I kno people will flame on me this point, but I have own several high torque diesels...

time will tell..

 

[jeepingib]

I worked up a spreadsheet. I used the EPA numbers directly for the combined. I then used a very conservative estimate based on the power of these engines taking 4 mpg from the 3.6, 3 from the 2.0, and 2 from the CRD for larger tires. This is purely speculation. I know that some people are getting worse or better numbers with the currently available engines, but this should at least give us a good idea. Then I pulled the average national fuel costs from eia, and past historic highs from 2008. I only used the average for unleaded as that is what was available. But this does not break it down by fuel grade individually. So there are some inaccuracies there. Then I calculated numbers to show us possibilities.

 

[Sean L]

Its interesting seeing people that will spend thousands of dollars to swap out their factory wheels and tires to run 37s in an absolute panic over not "recouping the cost" with the diesel engine. If your focus is purely on how much money is saved over fuel usage then Jeep life is not for you, and a used Prius will be a better choice.

Now, that being said running 35s or 37s should be a cakewalk with the torque this thing puts out.

 

[Sean L]

I worked up a spreadsheet. I used the EPA numbers directly for the combined. I then used a very conservative estimate based on the power of these engines taking 4 mpg from the 3.6, 3 from the 2.0, and 2 from the CRD for larger tires. This is purely speculation. I know that some people are getting worse or better numbers with the currently available engines, but this should at least give us a good idea. Then I pulled the average national fuel costs from eia, and past historic highs from 2008. I only used the average for unleaded as that is what was available. But this does not break it down by fuel grade individually. So there are some inaccuracies there. Then I calculated numbers to show us possibilities.

Excel guru!

 

[jeepingib]

Excel guru!

That's simple stuff, I get lost in the more complex equations.

 

[Sean L]

That's simple stuff, I get lost in the more complex equations.

Yes, I only use the simple equations but it makes my job so much easier! lol

 

[KIVO]

My thoughts are it should get around 25mpg loaded down.

For reference (though a different generation of engine), I got about 23-24mpg out of my 2 door JK diesel (2.8 4 cylinder).
That was most of the time unladen, and with rear seats removed (which are heavy).

 

[misanthrope]

Its interesting seeing people that will spend thousands of dollars to swap out their factory wheels and tires to run 37s in an absolute panic over not "recouping the cost" with the diesel engine. If your focus is purely on how much money is saved over fuel usage then Jeep life is not for you, and a used Prius will be a better choice.

Now, that being said running 35s or 37s should be a cakewalk with the torque this thing puts out.

37"s on a Prius...that would be the sweeeeet spot right there.

 

[TCogs1]

I worked up a spreadsheet. I used the EPA numbers directly for the combined. I then used a very conservative estimate based on the power of these engines taking 4 mpg from the 3.6, 3 from the 2.0, and 2 from the CRD for larger tires. This is purely speculation. I know that some people are getting worse or better numbers with the currently available engines, but this should at least give us a good idea. Then I pulled the average national fuel costs from eia, and past historic highs from 2008. I only used the average for unleaded as that is what was available. But this does not break it down by fuel grade individually. So there are some inaccuracies there. Then I calculated numbers to show us possibilities.

Great work.. Can we have a copy?

If so I will add the socialist country of Kalifornia $ into the spreadsheet and reshare..

I have a 3.6 and I run 91 octane all the time due to the high compression and it adds quite the spunk into the driving dynamics.. So gas here is closer to $4.50 per/gal.. and 13MPG is the best I ever seen on 37" and 16 MPG on stock 32 bfg..

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