Both ways and the computer is almost spot on the usage of fuel via miles traveled.

I check it all the time as i am always at the gas station it seems...

I just use the truck a few times a week to go to my treatments which are only 2 miles away so maybe that is why it's getting such poor fuel millage as well as the reformulated fuels for winter in Ca.

I just wanted to compare notes as to what others were getting.

Stu

I have a 12 ram 2500 crewcab 4x4 hemi and I get between 7 and 8 in the city and 18 on the highway. My truck has 3.73's. It's a 7100 lb truck. I have a superchips programmer and keep it on the 93 tune. And it goes. I don't drive like I'm 51 years old though.

V10 Ram 2500 4X4 here. Never cared to know. It's actually better than most V8 Rams from what I am reading because of the torque it takes so much less pedal to get it moving.

2005 1500 4 door 5.7 auto 3.55 gears, 100 mile round trip to work each day, 1/2 county roads, 1,2 interstate, 15.5 mpg average

2012 Ram 1500 R/T with a hyper tech tuner and 410 gears cold air kit and shorty headers. Around town about 12mpg and 15 on the highway. I'm not light on the go pedal either.

My memory is fuzzy but didn’t the first year of the 5.7 Hemi V8 have either broken valve springs, undersize valve stems or oversize valve guides?

Holy cow is that a lot of issues or what???

In my case the major stuff so far was I had to replace the gears in the factory corporate rear end right (C-clips fall off) as well as the font end axles right afterwards. The great sounding audio system died a couple of years ago and after trying to get some stock parts with no luck i just gave up and put in an aftermarket radio.



Stu

08 H.Q.C. 5.7, 3.91 gear ,12-14 mpg, towing was getting 9 now get 10 1/2 since adding cold air intake and cutback system

1992 D250 Cummins, 5-speed.

24.5 MPG

But it only gets 19 when pulling a loaded trailer.

2015 2500 5.7 Hemi 4x4 regular cab 3.73 gears I average 13-14 in town and 16-17 on the highway, at 138K the mileage never changes. I do get 8-9 MPG towing my 24' enclosed. Just about to take a trip out to Phoenix from Chicago, will update the enclosed hauling mileage and let everyone know if I have any money left in the bank...

I had one, smelled horrid, fuel cost 60 cents a gallon more, noisy and a head gasket job costs as much as replacing a 360 magnum of the same vintage. On the plus side I ran it on used engine oil mixed 50/50 from the honda dealer. If it did not cost 4x as much as a gas burner to buy one I would probably do that again but they just cost too dog gone much for what little benefit you do get.

Similar here: 2007 2500 5.7 Hemi 4x4 Regular Cab, 3.73 gears, LT285x70AS tires, 89 Mid-Grade fuel since new. Mileage 90k. Average 12-14 city, 16-17 highway. Drops a bit pulling a trailer. Not as much with max payload in bed.

What is your differential (61 ?)
And what ratio?

https://en.m.wikipedia.org/wiki/Dana_60#Dana_61

2015 Power Wagon 392, 4.10 diff, 33" DuraTrack tires, 4 door crew cab

70mph on nice level interstate no head wind I can get 17-19 mpg. Going uphill and head winds this will decrease.

Around town stop and go 10-12 mpg

55 mph highway, ideal conditions can see 20 mpg.
Indicated mpg is pretty close to calculated. All above not towing or loaded down.

Took an 800 mile round trip mostly interstate during July with AC on, 70mph and got 17 mpg average.

If you take it easy with this truck under good conditions you can actually get decent mpg considering the size/shape/weight.

Not sure. It's at 2000 RPM @ 70 MPH in overdrive.

That works out to 3.54 ratio
With 0.77 Getrag overdrive
and 32 inch tall tires

The later model trucks used a variable valve timing setup that boosted both low rpm and high rpm power by advancing the cam at low speeds and retarding it at higher speeds. This does help with economy as well. MDS was first implemented in 2006 if I recall. Both of those together probably add up to at least 3-4 mpg at freeway speeds. Since your truck has neither, you drive short trips, up hills, etc....your conditions are not optimal but 7 mpg is not good.
The 4wd does not help the numbers.
My 314,000 mile 2007 Ram still gets 16-17 at freeway commuting speeds. I have never checked mileage for any other condition.

You belong to an elite group for gas trucks! Of course the weather there is to kill for.

my 2011 5.7 hemi had 300,000 when I sold it, the durability on the gas motors has come way up and the diesels have gone way down because of all the emmissions controls, NVH improvements, sulfer taken from the fuel...