What to do to get better gas mileage on a 2021 Ram Big Horn?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

N2ezi

Junior Member
Joined
Jun 7, 2026
Posts
1
Reaction score
0
Location
Montour Falls NY
Ram Year
2021
Engine
V6
I would like to know is there anything I can do to get better gas mileage with out breaking the bank?
 

Dean2

Senior Member
Joined
Jun 17, 2021
Posts
4,460
Reaction score
8,955
Location
Near Edmonton
Ram Year
2021 2500
Engine
6.4
Buy a Prius Hybrid for a daily driver. Will be far cheaper than trying to get better mileage from your pickup. You can't overcome aerodynamics and weight. A Jeep GC with the same motor gets 50% better gas mileage.
 

turkeybird56

Military Vet 1976-1996 Retired US Army
Air Force Army Law Enforcement
Joined
Aug 2, 2018
Posts
25,918
Reaction score
56,724
Location
Central Texas
Ram Year
2019 Bighorn, 4 X 4, 3.21 rear, Bright Flame Red Pearl Coat, Mopar tonneau cover,Westin Bed rug
Engine
Hemi 5.7, Non E Torque
One Caveat. Buy a Prius and put RAM Badging on it. Best of both worlds (sic)
 

turkeybird56

Military Vet 1976-1996 Retired US Army
Air Force Army Law Enforcement
Joined
Aug 2, 2018
Posts
25,918
Reaction score
56,724
Location
Central Texas
Ram Year
2019 Bighorn, 4 X 4, 3.21 rear, Bright Flame Red Pearl Coat, Mopar tonneau cover,Westin Bed rug
Engine
Hemi 5.7, Non E Torque
OP: wateva mpg U getting be what it is: Proper PSI on tires. Running top tier fuel. Not carrying extra heavy junk in truck. Keep truck to 70 mph or less. No hard fast starts. Proper management of skinny pedal. Proper Maintenance: oil, fluids, filters etc.

Just so many factors influence Mpg’s.

Looked at yer profile. See u have V6. U got a vehicle being moved by a motor but that vehicle is a rolling brick with computers just only so much can be done. All above applies whether an 8 or 6 cylinder. Also keep an eye on yer oil filter housing. They R known to leak and PPL replace with a Dorman unit. Got nothing to do with MPG just maintenance item u need to be aware.
 
Last edited:

turkeybird56

Military Vet 1976-1996 Retired US Army
Air Force Army Law Enforcement
Joined
Aug 2, 2018
Posts
25,918
Reaction score
56,724
Location
Central Texas
Ram Year
2019 Bighorn, 4 X 4, 3.21 rear, Bright Flame Red Pearl Coat, Mopar tonneau cover,Westin Bed rug
Engine
Hemi 5.7, Non E Torque
I can say with all honesty that when I bought my Ram, MPG did not even enter my thought process. I simply wanted the truck.
It’s a square brick 5-6K rolling down a road. I bought for usage and need. MPG Neva made it through any considerations as U have to accept wat U got lol.
 

MarshRam

Senior Member
Joined
May 24, 2017
Posts
2,343
Reaction score
1,654
Location
Florida
Ram Year
2014 SLT 4x4, 2012 ST
Engine
Hemi 5.7
Answer: Pretty much nothing. The Truth. If it makes you feel any better, my 2012 and 2014 run on 93 and they both get 13.5mpg. If you look at it that way, your gas bill is looking fantabulous;) Hope that helps a little, the truth sucks sometimes.
 

TXrebel2019

Junior Member
Joined
Jun 7, 2026
Posts
2
Reaction score
1
Location
Texas
Ram Year
2019
Engine
5.7L hemi
My 2020 1500 classic tradesman 5.7 hemi got good gas mileage on cruise control 20 -22 mpg highway but the rebel i just got get 15mpg on highway
 
Last edited:

Magfan2

Senior Member
Joined
Oct 25, 2025
Posts
359
Reaction score
721
Location
Montana
Ram Year
2014
Engine
5.7
I knew when I bought this truck that it was not an economy car. I like driving a truck and it is worth the cost. Averaging around 16.6, no towing. My last truck, for 20 years, was probably getting around 12 mpg. Probably a wash considering fuel prices, and one way or another, those will come back down. Worth it to me in any case. If I have to, I'll cut somewhere else, I like driving what I like to drive.
 

2019RamInSC

Senior Member
Army
Joined
Nov 23, 2019
Posts
534
Reaction score
651
Location
South Carolina
Ram Year
2019
Engine
Hemi 5.7
In my humble opinion. Getting a V6 in a large pickup is a mistake. Especially if you drive it and expect any kind of acceleration. My Hemi with 392 gears gets 20-23 MPG on cruise on level highway. Of course its in eco mode most of the time. Around town I get 17-18. Now I don't baby it. I floor it several times a week. To blow out the carbon haha and its just fun.
Quick story. I bought a 1982 Mercury Capri RS. It had the 302 motor. I met a guy at the dealership who had the basic same car with a V6. Asked me about my gas mileage. I told him. He was flabbergasted how much more I got. And I rode that car hard!
Point. V6 does not mean better gas mileage. Your V6 is always working harder than my HEMI.
Good Luck.
 

jc56berg

Senior Member
Joined
Mar 1, 2026
Posts
122
Reaction score
275
Location
houston, TX
Ram Year
2020
Engine
5.7L Hemi
I knew when I bought this truck that it was not an economy car. I like driving a truck and it is worth the cost. Averaging around 16.6, no towing. My last truck, for 20 years, was probably getting around 12 mpg. Probably a wash considering fuel prices, and one way or another, those will come back down. Worth it to me in any case. If I have to, I'll cut somewhere else, I like driving what I like to drive.
Yes, absolutely if I was looking for 30 plus mpg I would have gotten a Camary. But I wouldn't have looked as handsome as I am in one. :cool:
 

Big_Bill

Junior Member
Joined
Aug 7, 2025
Posts
13
Reaction score
18
Location
Phoenix
Ram Year
2022
Engine
v-6
The best way to get better mileage is to be real careful about how you treat the gas pedal.
There are engine mods you can do, but given that the engine fuel system is a feedback controlled electronic fuel injection system, any one thing you do won't do much. If you want to spend the bucks, you can install a better exhaust, better intake, and better cam, each chosen to work with the others with the intention of increasing fuel mileage, not high RPM power (which is not going to be easy to find).
I feel your pain; my '22 Quad Cab V6 averages 21~22mpg, mixed street/freeway.
 

jc56berg

Senior Member
Joined
Mar 1, 2026
Posts
122
Reaction score
275
Location
houston, TX
Ram Year
2020
Engine
5.7L Hemi
I can say with all honesty that when I bought my Ram, MPG did not even enter my thought process. I simply wanted the truck.
I have to say Kt that I really like that pick of that kid on your profile. Did something similar like that when I was a young'in. Talk about a quick education. Thought my grandma was going to crap peach pits. :rotflmao:
 

kt4hx

Senior Member
Joined
May 25, 2025
Posts
343
Reaction score
259
Location
Virginia
Ram Year
2019
Engine
Hemi 5.7
I have to say Kt that I really like that pick of that kid on your profile. Did something similar like that when I was a young'in. Talk about a quick education. Thought my grandma was going to crap peach pits. :rotflmao:
I ran across that somewhere on line and thought it was a good example of the curiosity of a young boy. I never did what it depicts, but have been zapped a few times as an adult working on electrical things. Once to the point that I had one of those small little round wounds where it not only damaged the skin, but further down into the tissue of my index finger. Was very painful for some time!

I can quite imagine your grandma reacting to that! :)
 
Last edited:
Back
Top