Gas Mileage on 2025 Turbo I-6?

I'm just wondering if anyone knows what the gas mileage will be on the new 2025 Ram 1500 with the Turbo I-6, verses the current Hemi?

I've read in articles that it's expected to only improve by about 1 mpg over the Hemi. Not sure if that's for the SO or HO version. But since I have no plans to buy one I haven't researched it for myself.

as with any boosted engine with spark plugs, the more the accelerator pedal is pushed down so goes the fuel economy.
Ask any Ford EcoBoost owner, it's either Eco or Boost

I think to really know it will take some real world experience by a few early buyers. The EPA mileage figures aren’t very reliable. I may be mistaken on this, but apparently they don’t even take into account if the truck has a 3.31 rear or a 3.92 rear - they all are rated the same.

Toyota did seem to bump the Tundra figures up several mpg with the turbo 6, but then the old V8 was a gas guzzler to begin with so I wouldn’t expect to see as much change on the RAM. 1 mpg increase sounds like as good a guess as any.

I would wait to buying you are worried about fuel economy, and you can follow real world numbers on fuelly.com once they are in.

So far I am getting about the same 17.5 as my Hemi etorque 3.21 hears although this Hurricane has the 3.92 rear end. I have not really had the chance to take it on a road trip yet but short 40 mile hwy was showing about 22MPG which is slighter better. The Start Stop rarely activates with the AC on, seems if you set it to 62 degrees or less it over rides the stop start.

I wouldn't expect to make 30% more peak power and not sacrifice at least 20% fuel mileage. Hopefully he smaller displacement engine will be more fuel efficient in the cruising RPMs. I would love to see an dyno plot overlay for the power curves of both engines. Hemi vs H.O.

Keep us posted on how it does. I don’t think the Toyota Tundra turbo 6 is any mileage champ but then neither was their V8.

Lots of predictions and published numbers floating around but it looks like the SO is going to be around 21mpg combined and the HO is going to be around 17mpg combined.

My 2019 HEMI window sticker (1500 Big Horn 4x4) said 19mpg combined but I got 15mpg so I would take the numbers with a grain of salt.

I would have liked more but I bought a truck to be a truck so fuel economy was not a concern when I purchased it.

brian42 said:

Lots of predictions and published numbers floating around but it looks like the SO is going to be around 21mpg combined and the HO is going to be around 17mpg combined.

My 2019 HEMI window sticker (1500 Big Horn 4x4) said 19mpg combined but I got 15mpg so I would take the numbers with a grain of salt.

I would have liked more but I bought a truck to be a truck so fuel economy was not a concern when I purchased it.

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SO Hurricane fuel economy ratings have been out for a while. Combined mpg is 19 for the SO. I have yet to see a window sticker for a HO so I'm not sure what that's going to be rated at.

I6 fuel economy is basically Hemi territory

The 5.7 Hemi has a combined rating of 17, 15 city, highway 21.

My recent average is 18 MPG.

Last weekend I drove around north west Wisconsin, mostly county, interstate going between 45-65 mph. I got a whopping 24.5 average with my Hemi.

Week days commute is 80% city and I'm averaging between 22.5 and 23, even with AC.

the MPG killer is getting up to speed 40-50 from a dead stop. That and winter...winter we were averaging 17-19 4WD active.

I only use Shell top gas, runs well with it.

leftchevybehind said:

I6 fuel economy is basically Hemi territory

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That's one of the reasons why I went with the hemi.

Picked up my 2025 1500 Rebel two nights ago. So far, just driving locally, I'm seeing 15. Doing a long road trip next week but I'll be towing.

Expecting about the same as the Hemi. Can definitely feel the power though.

I recently watched a TFL episode where they compared a Hurrican RAM Rebel to a GMC 1500 6.2L Sierra and the Ford F150 Tremor with a Coyote engine. They took all three on a 100-plus mile driving loop. I expected more from the Hurricane, but the Coyote engine beat the Hurricane by 2 MPG.

BossHogg said:

I recently watched a TFL episode where they compared a Hurrican RAM Rebel to a GMC 1500 6.2L Sierra and the Ford F150 Tremor with a Coyote engine. They took all three on a 100-plus mile driving loop. I expected more from the Hurricane, but the Coyote engine beat the Hurricane by 2 MPG.

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I wonder how much their increased elevation played in to that. Figure at that altitude, NA motors are down roughly 15% on power since they have a tougher time dealing with the thinner air. Less air needs less fuel but makes less power. Interesting test, though, be interesting to see if the same holds true at lower elevations. If I were buying a 1/2 ton today, it'd probably be the Tremor. I came pretty close to buying one when I got my PW anyway.

I can’t believe, I mean I’m just flabbergasted that the 5.7 hemi is gone and not even so much as offered to save basically nothing on fuel?!? Replaced with a more complicated, and expensive, albeit more powerful engine. At least ford and Chevy offer a V8 option.

I had a 17 bighorn with 3.21s that regularly would average 21 mpg on a tank of fuel for my work commute. Hand calculated.

Docwagon1776 said:

I wonder how much their increased elevation played in to that. Figure at that altitude, NA motors are down roughly 15% on power since they have a tougher time dealing with the thinner air. Less air needs less fuel but makes less power. Interesting test, though, be interesting to see if the same holds true at lower elevations. If I were buying a 1/2 ton today, it'd probably be the Tremor. I came pretty close to buying one when I got my PW anyway.

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I agree that the NA engines would be down on power due to the Denver altitude. That should not mean they had increased efficiency. The E-470 around Denver is not a hill climb. The speed limit is 75 and they appeared to be cruising in the right lane in the video.

I do agree that the Tremor was impressive. It's lighter due to the AL body. The Coyote also runs on 87 octane - not true for the other two contenders.

I had thought that the Aero drag would be the deciding factor. The GMC disproved that. The aero on the RAM is a brick into the wind. The GMC is a cinder block. The fact that it beat the ram had me searching for "other" reasons.

I could not find fault with the methods. The distance was a little short, but to their credit, they used the same pump to fill each vehicle. It also appeared that they were using cruise during the test. No joy there.

That got me thinking that it might not be the engine that was causing the fuel economy difference. Maybe it was the trim level.

Soooo. I headed over to fuelly to see what RAM VS GMC VS FORD MPG differences where for 2023 normal and off road trims. I compared relevant V8 trims for all 3 brands. What I (think) I found was that the Rebel trim gets FAR worse mileage than other ram trims. The "off road" trim for the different brands were Tremor, ATX4, and Rebel. Now granted, the off-road trims had far fewer vehicles on fuelly. Add to that their owners likely drive the vehicles very differently. Nonetheless, the differences between the Rebel and the other two trims makes me think this is a chassis issue, not the engine.

Based on this, it's not the Hurricane engine that's getting poor mileage - it's the Rebel trim. This of course begs the question - why are we comparing highway fuel economy on trucks with off road trims. It may be a 1:1:1 comparison, but is that what the customer is buying that off road trim for? Anyone for a muscle car towing competition?

If anyone wants to see the fuelly data - speak up.

20IndyRam said:

I agree that the NA engines would be down on power due to the Denver altitude. That should not mean they had increased efficiency. The E-470 around Denver is not a hill climb. The speed limit is 75 and they appeared to be cruising in the right lane in the video.

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Not more efficient, no, quite the opposite. Simply injecting less fuel per cycle because, if not, the computer will detect it's running too rich due to the thinner air. As you said, it's not a hill climb, they don't need that much power to maintain speed, so the reduced hp is irrelevant. It would probably start to flip if they were towing heavy or otherwise needing more power where the forced induction's edge in efficiency would show up more.

I had thought that the Aero drag would be the deciding factor. The GMC disproved that. The aero on the RAM is a brick into the wind. The GMC is a cinder block. The fact that it beat the ram had me searching for "other" reasons.

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Thinner air, again, maybe helping mask the difference? Seems fairly dramatic for that, but dunno.

Based on this, it's not the Hurricane engine that's getting poor mileage - it's the Rebel trim. This of course begs the question - why are we comparing highway fuel economy on trucks with off road trims. It may be a 1:1:1 comparison, but is that what the customer is buying that off road trim for? Anyone for a muscle car towing competition?

If anyone wants to see the fuelly data - speak up.

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It's still good info. Buyers of these trucks are still going to use them on the highway the vast majority of the time, if not all the time. I take my PW off road, but I may drive 5-24 hours to get to where I want to do that. If I was only concerned about offroad, I'd have bought a TJ Jeep...