Gas Mileage

[MRFREEZE57]

2016 1500 4wd crew cab, 5.7, 3.21, 75k miles, 20” highway tires, 5w20 synthetic on 5k change. Mileage typically 20-23 mpg on highway 65-75 mph speeds using cruise as much as possible. Town 16-18 mpg. Drive gently.

that is pretty good mileage, sounds like you have the same exact truck I have except my truck has the 3.92 gears which likely will cause a bit of drop in mileage.

 

[Dr B]

Looked at your air filter?

 

[slbenz600]

I have proved that with less than a grand you can increase mileage by 5 mpg and power is awesome.
I went from having 4 cylinder cars kick my tail to leave them in the dust.
I have posted the details a few times, some don’t like to make your Hemi breath as needed they would rather use twice the fuel needed.

 

[kingtchr]

Need to use Higher octane gas per Owners Manual.

 

[gto64gto]

I don't know why your milage is so low. Both of these trucks has stock rims and tires. 1st was a 2010 1500 quad cab 2 wheel drive with 5.7, 5 speed auto, and 3.21 gears. Normal around driving was around 19 MPG. I went to Texas and averaged 21 MPG round trip. My previous truck was a 2000 Ram 2 wheel drive with a 360. I got 13 MPG with it. I have a 2017 quad cab 1500 4 wheel drive with 5.7, 8 speed auto, and 3.73 gears. I average 19 to 20 MPG normal driving and 22 on trip to Texas. I use 90% gas and use my cruise control all I can. Using it always has given me more MPG. My wife doesn't use cruise much, drives different than me and get 3 to 3 MPG less

 

[JS4024]

LOL don't by a Hemi pickup if you can't afford the gas to run it. NEVER believe the EPA sticker on the window! If it says 21 highway plan on 17 - 18. If it says 12 city, plan on 9. They run the test in a perfect, temperature controlled environment. Flat and level, fixed amount of fuel. Gas tank is empty its fed off a separate container. They start the truck, get it to the test speed then open the valve for their fuel container and drive until it is empty. about a cup of gas is burned and they interpolate what the fuel mileage is from that test.

 

[njjeff201]

2021 1500 with 1800 miles so it may improve down the road. Tires were 50 lbs. I was getting 19.2 with A/C on some of the trip from NJ to PA. Just increased tires to max of 55 wondering if it will help.

 

[njjeff201]

Anyone have any experience on any of these fuel savers?

https://carperformancechipreviews.com/?gclid=EAIaIQobChMI6PXJxufl8AIVyG1vBB0c6gbqEAMYAiAAEgJYevD_BwE

I was looking for the EFFUEL chip and came across this site. I'm wondering if these devices VOID your warranty...?

I welcome your feedback.

 

[RLJ10X]

For all those 3.21/8 speed owners who’ve ever tried to convince us that was the greatest combination ever, for fuel economy, and all else, my new best friend BigSky, just said in effect: Not so much”.

2011s with that rotten old 546RFE is still hanging right there with the Game Changer trucks.

 

[Marshall]

I am in Canada so gallons are different and we go by liters, which is a rip off .
Your numbers sound really off to me, 1970 ford numbers.
my 14 sport with 8 sp, 3.9 gears is great, I can get 10 liters / 100km which is close to what the wife's Honda CRV AWD will do on the highway at 70-75 mph ( 120km/h) I run reg. gas 90% of the time.
It is some where in the high 20's ,m/g,.
If you put your foot into it or windy, never mind , it goes to hell. I have not computed the numbers , But I am happy with them, way better than the 2009 Larraine with same motor , but not a 8 speed.

 

[Mudd_jumper]

.
second verify that your mileage estimates are accurate by hand calculating distance vs. fuel use, the old fashioned way and see if that gives you a different number than the dashboard display.

Have done this on EVERY vehicle I have owned to double check gauges and know for sure possible of distance of travel.

 

[Bigs]

Been a little over a week since I've had my RAM Classic with the 3.92 rear end... I'm averaging 13.5L/100KM or 18MPG combined driving with 89 octane fuel. I have 940 KMs / 584mi on the odometer.

We have a few hills here and there but no rocky mountains here. We are in a valley here so it's always windy as F and can see it does affect mileage if it's in my face!

I know I can do better but I have to say, it's hard not to stamp on the gas to hear that HEMI roar!