What's your gas mileage with 3.92 gearing and the 5.7?

[BWL]

I get around 13.5l per 100km on long highway drives on average and about 17l per 100km in the city. I'm not in a doing math mood, but you can convert to mpg if you're motivated enough.

 

[seabrook]

According to EVIC I got 22 going from Texas to New Mexico, Colorado, Utah, Arizona with MDS locked out. then on the way back my my wife drove from Amarillo to DFW and since locking MDS out baffles her we drove with MDS on and it went down to 20. My speeds were 5 mph over the speed limit in most places that meant I was going 85 mph.

 

[TestPilot57]

According to the EVIC I get an overall average around 13.5 to 14.5.

My typical drive is 6 miles of very hilly (mostly 4-5th gear) 35-40 MPH, 16 miles of light rolling terrain (occasional downshifts to 7th) at 50-55 MPH and 4 miles in town at 25-30 MPH.

I have gotten up to around 20 on a 50-60 MPH trip.

 

[Flame Red Rebel]

16 to 18 average, mostly 60 mph roads

 

[Amerinamese]

I've had my truck for 3 fill ups so far and am averaging 17.2 MPG with 3.92 rear end.

 

[CG2742]

Get about 20-21 according to computer anyway. Doing 90. Highways.

 

[ChevySlayer69]

I'm getting 18mpg hand calculated on 35s with 3.92 and 8 speed. 4x4 quad cab express. That's summer mileage. MPG improved 1mpg when I started running diablo 87 tune and removed clutch fan. I have the e fan come on at 205 and it stays on so truck runs at thermostat temp. I think the grill shutters stay shut all the time now since the fans always running and helps mpg. Also, I drive like an old man.

 

[JF19Longhorn]

Low 16mpg and that's more than 75% empty hwy driving around 72mph.

It will surely plummet to the low 15mpg range again now that winter fuel is coming back.

The least efficient truck I've ever owned and that includes a Superduty Crewcab gasser and a 6.2L Raptor.

 

[TestPilot57]

Get about 20-21 according to computer anyway. Doing 90. Highways.

Is Mesa somewhere that measures distance in Kilometers?

 

[blahargoue]

Based on my experience so far with my 2020 Laramie 1500 5.7 Crew Cab 4x4 with a 3.92 versus my good friend's 2019 Laramie Quad Cab 4x4 with a 3.21:

Expect about 1 mpg less on long open road highway trips at 75 mph with the 3.92. I routinely travel 300 miles between my two homes and the best I've eeked out of my truck has been 19.4 mpg. The planets must have been all in alignment because most often I average about 18.2 mpg.

My friend seems to do about 1 mpg better on long trips. But I frequently tow an 8000 lb travel trailer so I wanted the low end grunt.

 

[runamuck]

I have gotten over 20 on most highway trips from mine..

 

[zeus2120]

2014 1500 with the 5.7 and 3.92 here. I have never broken 19 mpg on the highway. I usually cruise between 65-75 depending on the interstate. For reference, my average Cleveland - Pittsburgh run on I-80 at 75-76 mph, I get no more than 16 mpg hand calculated. My city mileage is between 12-13 hand calculated.

 

[TestPilot57]

55 Saves Gas!

 

[Wahrsuul]

55 Saves Gas!

That's completely false! I'm 56 and it hasn't saved me a bit!!

 

[Turbo67]

get the fuelly app, tracks your mileage and you can look at what other people with similar trucks get.

 

[JF19Longhorn]

Just dropped to mid 14's the last two tanks, mostly highway.

 

[2012RAM1500RT]

I have a 2012 1500 regular cab with the 5.7 and 4.10 rear axle ratio. The best I can do at 70 t0 75 MPH is around 18.5 MPG. I am taching around 2100 RPM between 70 and 75. If I can ride back roads and do 60 MPH or less I can get near 20 MPG. That's being as light footed as I can and hand calculated.

 

[Tony Rossi]

I have a 2021 with e-Torque and I have been averaging 17.6 MPG with mixed driving, maybe a bit more highway than city and backroad use. Hilly terrain here in Western PA as well. I’m very happy with that and it’s better than the 2020 Tacoma TRD Off Road I traded in.