RHO range and MPG

[D&Sadventure]

Very efficient engine. More efficient than the hemi. Less aerodynamic shape, larger heavier tires. This engine is making 540 hp and will move its larger truck body like a car almost half the size and weight. If your looking for higher mpg look elsewhere. Lots of cars out there. If you need a truck and like the RHO try a Rebel or a Limited. Or just keep your Wagoneer.

 

[JS59]

Very efficient motor. Less aerodynamic shape, larger heavier tires. This engine is making 540 hp and will move its larger truck body like a car almost half the size and weight. If your looking for higher mpg look elsewhere.

Might be efficient in terms of making power for it's size, but not for mileage - which I thought was the whole point why Stellantis developed the engine. I get better mileage in my 2020 Nissan Titan XD - Pro 4x nonetheless - than my wife's 3 liter standard output Wagoneer. Just was expecting more on the mileage side - that's why I opted for the 3 liter in the Wagoneer vs. the Hemi.

 

[D&Sadventure]

You’re in a great position. You already have two vehicles in your driveway that you feel are better. Problem solved. What you’re not considering is the HO motor is making significantly more power. That power is not free.

 

[JS59]

You’re in a great position. You already have two vehicles in your driveway that you feel are better. Problem solved. What you’re not considering is the HO motor is making significantly more power. That power is not free.

I wouldn't have an RHO on order or be spending time on this forum if I thought my current vehicles were better!

 

[D&Sadventure]

Might be efficient in terms of making power for it's size, but not for mileage - which I thought was the whole point why Stellantis developed the engine. I get better mileage in my 2020 Nissan Titan XD - Pro 4x nonetheless - than my wife's 3 liter standard output Wagoneer. Just was expecting more on the mileage side - that's why I opted for the 3 liter in the Wagoneer vs. the Hemi.

It takes fuel to make power there is a direct relationship. And obviously fuel is related to mileage. Boosted motors have a wider swing. Think of it this way at low boost levels every day driving this motor is extremely efficient. At higher boost levels. It is going to burn more fuel than a lower boost levels, But still very efficiently given the power it’s capable of. 28 pounds of boost is equal to approximately 2 additional atmospheres. Atmospheric pressure is 14.7 pounds per square inch at sea level. Every 14.7 pounds of boost is an additional atmosphere. So it is putting almost 3 times the air through the motor at full boost. In order to maintain a stoichiometric ratio it will require three times the fuel theoretically. if you’re gonna compare it to a normally aspirated hemi you need to make that a 9 L hemi. This motor sort of gives you that 3 L efficient motor at tame driving levels but that 9 L NA hemi when you want it.

It’s a lot more complicated than that but that’s basically how it works. In short, you may want to get with your inner accountant and have him budget more money for fuel.

 

[OBYsRHO]

Yup whatever he said. To put in real world use, I started my drive with 13.1mpg. Drove about an hour (65-75mph) increased to 13.5. Did two fun acceleration and dropped back to 13.1 in matter of seconds. If anyone is worried about gas cost this truck ain't for you

 

[cdy2179]

I do wish the RHO got a little better but the HO I6 in the limited does do better than the old hemi. I have a 5.7 etourqe 3.93 in a 2020 limited and my coworker just got a 25 limited with a HO i6 with the same rear end and I think it's the same 8 speed transmission. He gets a little better MPG than I do. He's around 2mpg better getting a little over 20 mpg on the interstate where my hemi was around 18.

The engine itself does seem to be better than the hemi MPG wise. The RHO is just wearing a lot larger/heavier shoes and is lifted.

 

[just a engineer]

I do love how smooth this engine is - but seems a bit odd that a mfg. would invest this kind of $$$ into an engine that in my view is actually less efficient than the old hemi.

The change from 5.7 hemi to 3.0 hurricane was not done for fuel efficiency but for government compliance. Not just our EPA but other governments throughout the world. The smaller displacement turbo has a "ability" to be more fuel efficient if power figures are the same but they are not. The power out of the new engine is substantial higher then the Hemi. Im not talking about peak, but area under the curve. That's easily understood as soon as you try and 0-60 pull in the two.

But most importantly (from compliance perspective) the higher exhaust temperatures from the turbo will result in less pollutants out of your tail pipe.

So your getting a cleaner, smoother, faster, engine that isn't substantial less fuel efficient then the old one.

 

[truckguy]

I do wish the RHO got a little better but the HO I6 in the limited does do better than the old hemi. I have a 5.7 etourqe 3.93 in a 2020 limited and my coworker just got a 25 limited with a HO i6 with the same rear end and I think it's the same 8 speed transmission. He gets a little better MPG than I do. He's around 2mpg better getting a little over 20 mpg on the interstate where my hemi was around 18.

The engine itself does seem to be better than the hemi MPG wise. The RHO is just wearing a lot larger/heavier shoes and is lifted.

I have a 2019 Laramie with a 1.5 inch lift and went up on tire size just barely with nitto ridge grapplers. I get 13.5mpg on average. Mostly highway miles.

 

[RADA]

The range says about 357 on the dash. I hit reset by accident, but before that, it was saying around 12.4mpg

 

[Banger]

I'm averaging 12.3 mpg during my daily commute, which is 23 miles, mostly highway, and cruise control is set on 80. It's Ohio, and we have winter gas, so MPG will likely go up in the warmer weather. My outgoing 2020 Rebel on the same commute would average high 14's/low 15's this time of year. In summer the Revel would get closer to 16.5 MPG.
I'm not upset in the slightest with the drop in fuel efficiency, given how much sweeter this truck is than my Rebel!!

 

[jb37]

I'm averaging 12.3 mpg during my daily commute, which is 23 miles, mostly highway, and cruise control is set on 80. It's Ohio, and we have winter gas, so MPG will likely go up in the warmer weather. My outgoing 2020 Rebel on the same commute would average high 14's/low 15's this time of year. In summer the Revel would get closer to 16.5 MPG.
I'm not upset in the slightest with the drop in fuel efficiency, given how much sweeter this truck is than my Rebel!!

same "boat" here ... and not far from you in western NY ... the hemi in the Rebel for sure liked 65-70 better than 75-80 MPH .... and the Duratrac's being smaller and not as wide - had to have helped the MPG ... but wouldnt swap back for a few mpg's

 

[RHOfan]

same "boat" here ... and not far from you in western NY ... the hemi in the Rebel for sure liked 65-70 better than 75-80 MPH .... and the Duratrac's being smaller and not as wide - had to have helped the MPG ... but wouldnt swap back for a few mpg's

The Hemi MPG peaks at approx 45 mph. That was enough speed to put the ZF into 8th. Higher speeds just increase wind resistance. And, it goes up exponentially, so there is a huge difference between 65 mph & 80 mph. Running 80 mph in a pickup with off-road biased tires takes a TON of power, so fuel economy is going to suck.

Now, the Hurricane/ZF combo…it holds on to 6th and 7th gears when running 45 mph, especially with the drive mode set to Sport. In Regular mode, I do get 8th gear, but not until highway speeds.

What does this mean? Well, I’ve got a lifetime average of 14.7 MPG driving mostly like a grandpa, mixed highway/city. Guess it rounds to the mixed EPA figure of 15 MPG. Now that I’ve changed the oil, my right foot isn’t going to be as kind, so expecting MPGs to go down. Ugh.

 

[JS59]

The Hemi MPG peaks at approx 45 mph. That was enough speed to put the ZF into 8th. Higher speeds just increase wind resistance. And, it goes up exponentially, so there is a huge difference between 65 mph & 80 mph. Running 80 mph in a pickup with off-road biased tires takes a TON of power, so fuel economy is going to suck.

Now, the Hurricane/ZF combo…it holds on to 6th and 7th gears when running 45 mph, especially with the drive mode set to Sport. In Regular mode, I do get 8th gear, but not until highway speeds.

What does this mean? Well, I’ve got a lifetime average of 14.7 MPG driving mostly like a grandpa, mixed highway/city. Guess it rounds to the mixed EPA figure of 15 MPG. Now that I’ve changed the oil, my right foot isn’t going to be as kind, so expecting MPGs to go down. Ugh.

Helpful. I also just realized premium is $1 more per gallon in my market. I think I'm just gonna get a Prius!

 

[RAM-Ranch-MT]

Yeah not sure why anyone would buy a high horsepower offroad super truck on 35s and expect it to get great mileage or be worried about MPG. Its gallons per smile boys. That being said if these are getting close to TRX mpg (sub 10) then it would raise concern, they will improve after broken in as well. Ill be happy with 13-14 MPG which equates to 430-460 miles of range, which will be great offroad. One thing that always drove me crazy about Raptor owners is they were always bragging about MPG and how many miles they could squeeze out of a tank. LITERALLY all they talked about, why even own these trucks if you don't drive them hard or use them? saving it for the next guy? LOL. IF you don't use the truck for what's intended then why not buy a Prius? Rant over. cheers!

 

[MattH89]

Yeah not sure why anyone would buy a high horsepower offroad super truck on 35s and expect it to get great mileage or be worried about MPG. Its gallons per smile boys. That being said if these are getting close to TRX mpg (sub 10) then it would raise concern, they will improve after broken in as well. Ill be happy with 13-14 MPG which equates to 430-460 miles of range, which will be great offroad. One thing that always drove me crazy about Raptor owners is they were always bragging about MPG and how many miles they could squeeze out of a tank. LITERALLY all they talked about, why even own these trucks if you don't drive them hard or use them? saving it for the next guy? LOL. IF you don't use the truck for what's intended then why not buy a Prius? Rant over. cheers!

My beef originally with this was not with the gas mileage itself, but how different the real world MPG is vs the advertised MPG from RAM. I never cared what the number was, I just hate deceptive marketing.

 

[RAM-Ranch-MT]

My beef originally with this was not with the gas mileage itself, but how different the real world MPG is vs the advertised MPG from RAM. I never cared what the number was, I just hate deceptive marketing.

agreed!

 

[jb37]

Helpful. I also just realized premium is $1 more per gallon in my market. I think I'm just gonna get a Prius!

just dont put 35's on it

 

[Cautionary Tale]

My beef originally with this was not with the gas mileage itself, but how different the real world MPG is vs the advertised MPG from RAM. I never cared what the number was, I just hate deceptive marketing.

I agree that EPA should be an accurate benchmark for all manufactures, but...

For some perspective: Toyota uses "special" tires on their Tundra's to cheat the EPA MPG. The factory tires are essentially just shaved down tires that get less than 10k miles before needing replaced.

Just sayin' it could be much worse. I'm glad these come with REAL tires so at least we won't have such surprises.

 

[jb37]

I agree that EPA should be an accurate benchmark for all manufactures, but...

For some perspective: Toyota uses "special" tires on their Tundra's to cheat the EPA MPG. The factory tires are essentially just shaved down tires that get less than 10k miles before needing replaced.

Just sayin' it could be much worse. I'm glad these come with REAL tires so at least we won't have such surprises.

Was thinking just the same - got a F150 FX4 years back and it came with Pirelli Scorpions on it ... by far more street tire than truck tire (IMO) .... im sure it was helpful to Fords EPA rating.