Set up and gas mileage questions...

[Jeep2004Guy]

My wife currently has a 2020 Sahara JLU 3.6 on 35 12.5x17 on a 2 lift, stock 3.73 gears. We do a lot of long road trips and she drives mostly hwy miles and is currently at 20mpg avg.

I am looking to get either a 2022 Overland JT Diesel (and change to 4.10 gears and add a locker later) or Rubi with either 3.6 or Diesel. We would probably go with the same 35's and never bigger than 37s but are looking to add some gear and a roof top tent for some of our longer trips.

So question, with all the diesel madness in the news can you still find it easily in the mid west and west (we are in the south and I see it at all the pumps) or should I just go with the 3.6 and a 4.10 gears? I would just like to get at least 20mpgs or more. Thanks for every ones input!

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[Jefe1018]

I'm in a diesel on 37's - I get 24-25mpg highway. Around town I get between 17-19mpg. The stock gears can take a bit of weight without performance suffering too much, even on 37's. I've towed quite a bit with mine on stock gearing and am content. Some folks will say that you need to regear for 37's, I don't feel you do, it is drivable as is.

 

[Jeep2004Guy]

I'm in a diesel on 37's - I get 24-25mpg highway. Around town I get between 17-19mpg. The stock gears can take a bit of weight without performance suffering too much, even on 37's. I've towed quite a bit with mine on stock gearing and am content. Some folks will say that you need to regear for 37's, I don't feel you do, it is drivable as is.

Awesome, so you still have the 3.73 on 37s and 17 around town? That’s what I’m looking to hear. I know there are a lot of other factors but that sounds pretty good. Thank you.

 

[Jefe1018]

Awesome, so you still have the 3.73 on 37s and 17 around town? That’s what I’m looking to hear. I know there are a lot of other factors but that sounds pretty good. Thank you.

Correct, I picked it up with 11 miles with the Mopar lift and 37's.

 

[JeepTaco]

My wife currently has a 2020 Sahara JLU 3.6 on 35 12.5x17 on a 2 lift, stock 3.73 gears. We do a lot of long road trips and she drives mostly hwy miles and is currently at 20mpg avg.

I am looking to get either a 2022 Overland JT Diesel (and change to 4.10 gears and add a locker later) or Rubi with either 3.6 or Diesel. We would probably go with the same 35's and never bigger than 37s but are looking to add some gear and a roof top tent for some of our longer trips.

So question, with all the diesel madness in the news can you still find it easily in the mid west and west (we are in the south and I see it at all the pumps) or should I just go with the 3.6 and a 4.10 gears? I would just like to get at least 20mpgs or more. Thanks for every ones input!

With 35's I don't think you'll ever get over 20 mpg with a gas V6.

I've never seen over 20 mpg (combined) in my stock V6 gas truck with 32 in tires and .373's. I do live in socal though so I see a crap load of traffic most of the time.

Diesel seems plentiful at stations near me but it is currently more expensive than gas.

Cheers and good luck.

 

[Barnaby’sdad]

‘22 Rubicon 3.6 here. You’re most likely not going to see 20 MPG with a JTR 3.6 unless that’s mostly highway driving. Mixed driving is a bit below 20 MPG (taking it pretty easy on it).

Add 35’s to that? 20+ MPG in mixed driving with the 3.6…I doubt very much that’s going to happen.

If you only care about fuel economy, get a diesel JT.

 

[Jeep2004Guy]

With 35's I don't think you'll ever get over 20 mpg with a gas V6.

I've never seen over 20 mpg (combined) in my stock V6 gas truck with 32 in tires and .373's. I do live in socal though so I see a crap load of traffic most of the time.

Diesel seems plentiful at stations near me but it is currently more expensive than gas.

Cheers and good luck.

Thank you. Yes, we get right at 20 with 35s and 373s. It in a JLU not a JT. I was thinking that maybe with the Rubi’s option of 3.6 and 410s I could get 20mpgs but honestly I really want the Diesel and am just trying not to talk my self out of it.

 

[Barnaby’sdad]

Thank you. Yes, we get right at 20 with 35s and 373s. It in a JLU not a JT. I was thinking that maybe with the Rubi’s option of 3.6 and 410s I could get 20mpgs but honestly I really want the Diesel and am just trying not to talk my self out of it.

It’s great, but not for fuel economy, lol. It really isn’t bad though and If you care to do the math, it might benefit you to go one way or the other. Or just go buy the diesel, lol.

 

[Jeep2004Guy]

‘22 Rubicon 3.6 here. You’re most likely not going to see 20 MPG with a JTR 3.6 unless that’s mostly highway driving. Mixed driving is a bit below 20 MPG (taking it pretty easy on it).

Add 35’s to that? 20+ MPG in mixed driving with the 3.6…I doubt very much that’s going to happen.

If you only care about fuel economy, get a diesel JT.

Yeah, I’m not only worried about MPGs but also having heavy gear like a bed rack, rooftop tent and supplies for a few days as well.
I would take most of that stuff off and it would be my DD and a nice 50/50 Hwy/city driving. My current DD is an ‘04 TJ 4.0 on 33s I get about 13mpgs with that so really anything is an improvement!

 

[Jefe1018]

I really want the Diesel and am just trying not to talk my self out of it.

Okay, well let me do my best as a diesel owner who loves his rig.

1) Are you okay with occasionally needing to take the pedal off the metal in the heat? The JT has a relatively small hood compartment, diesel motors - especially turbo charged ones, generate a lot of heat. There are plenty of discussions on folks over heating on steep grades in the summer when towing. I have had it come close to the de-rate oil temp (265 degrees) only once while towing my boat. I simply couldn't do the 70mph speed limit and kept it at 55-60mph for the really steep grades. Kind of nerve wrecking.

2) Is this your first diesel? Modern diesels require DEF for the exhaust, that's an added $20 for maintenance or operating about every 5,000 miles.

3) The CP4 injection pump, it may or not be a ticking time bomb - do your research

4) Oil changes and filters are expensive - yes the first three are free - but the rest will make up for it

If you can live with those four compromises, especially no. 1 being the big one, then you can counter with the following:

1) Power and torque - drive them both, it's hilarious what the 3.6 does in comparison.

2) Bigger tires? No problem, no real need to re-gear anything 37 or below and you'll keep your fuel economy

3) Towing is actually easier, when it's not too hot out, even though the rated capacities are lower (see #1 of the cons).

4) 4lo control when crawling - again, low end torque is awesome!

 

[Jeep2004Guy]

Okay, well let me do my best as a diesel owner who loves his rig.

1) Are you okay with occasionally needing to take the pedal off the metal in the heat? The JT has a relatively small hood compartment, diesel motors - especially turbo charged ones, generate a lot of heat. There are plenty of discussions on folks over heating on steep grades in the summer when towing. I have had it come close to the de-rate oil temp (265 degrees) only once while towing my boat. I simply couldn't do the 70mph speed limit and kept it at 55-60mph for the really steep grades. Kind of nerve wrecking.

2) Is this your first diesel? Modern diesels require DEF for the exhaust, that's an added $20 for maintenance or operating about every 5,000 miles.

3) The CP4 injection pump, it may or not be a ticking time bomb - do your research

4) Oil changes and filters are expensive - yes the first three are free - but the rest will make up for it

If you can live with those four compromises, especially no. 1 being the big one, then you can counter with the following:

1) Power and torque - drive them both, it's hilarious what the 3.6 does in comparison.

2) Bigger tires? No problem, no real need to re-gear anything 37 or below and you'll keep your fuel economy

3) Towing is actually easier, when it's not too hot out, even though the rated capacities are lower (see #1 of the cons).

4) 4lo control when crawling - again, low end torque is awesome!

I have been doing as much research as I can. I live in the south (Ga) so my main worry is the Heat but I don’t really tow anything, maybe a bass boat 30 minutes to the lake and no real hills to speak of.
When I do go to the mountains it’s usually to camp so that would be what the roof top tent would be for. We are also in the planning stages of a trip to northern Rockies but would have the roof top tent and some gear.
70% of my driving would be no tent, no gear just work.
Thank you again for your input!

 

[jebiruph]

My wife currently has a 2020 Sahara JLU 3.6 on 35 12.5x17 on a 2 lift, stock 3.73 gears. We do a lot of long road trips and she drives mostly hwy miles and is currently at 20mpg avg.

I am looking to get either a 2022 Overland JT Diesel (and change to 4.10 gears and add a locker later) or Rubi with either 3.6 or Diesel. We would probably go with the same 35's and never bigger than 37s but are looking to add some gear and a roof top tent for some of our longer trips.

So question, with all the diesel madness in the news can you still find it easily in the mid west and west (we are in the south and I see it at all the pumps) or should I just go with the 3.6 and a 4.10 gears? I would just like to get at least 20mpgs or more. Thanks for every ones input!

Isn't stock gearing on a 2020 JLU 3.6 3.45?

 

[Jeep2004Guy]

Isn't stock gearing on a 2020 JLU 3.6 3.45?

They might be. I believe 3.45 was standard with 3.73 being an option. We bought hers off the lot so I would have to go back and look at the paperwork. It could be 3.45 with the 8 spd tran though.

 

[jebiruph]

They might be. I believe 3.45 was standard with 3.73 being an option. We bought hers off the lot so I would have to go back and look at the paperwork. It could be 3.45 with the 8 spd tran though.

3.73 was/is diesel only.

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