Ram 2500 5.7 hemi mpg.....a bit disappointed

zogg wrote:
The other day we took a trip ftom southern illinois, through st louis, to southern Missouri...a couple of hundred miles each way.

Starting out I reset the mpg meter on the dash, and recorded 17.4-17.8 mpg driving at 62-65 mph going through st louis. Once we got out of town, I ran at 75 mph the rest of the way to our destination. The MPG continually dropped until it hit 14.3, which is where it stayed.

Going through southern Missouri is fairly hilly and the truck geared down quite often...more than expected.

On the return trip, I again reset the mpg meter and after about 30 miles at 75 mph, I was right back to 14.3 mpg.

A we approached st louis, we had to slow back down to 65 mph.....mpg came back up to 17.3 and we finished the trip at 17.6.

I never had a truck that would drop 3+ over a 10 mph range....surprising. we were totally unloaded in 2wd the whole trip. 

I am wondering how this compares with the 6.2 L engine in the same truck??????

I was kind of expecting about 3-5 mpg better from the 5.7 hemi

I have a 2014 Dodge Ram 2500 4x4 short bed with a 5.7L and I get right at 15 (14.9 to be exact)Highway. Now this is what the trip computer says. but if you figure the MPG by doing the math on what you put in the tank and miles driven it will be different. My Fuel Buddy App on my phone (which is great by the way) tells me this:

Overall city and hwy avg = 12.9mpg
and my cost per mile is= .179

If you are getting 17mpg you are doing really well.

If I drop down to 60 MPH I can increase the MPG to about 17 (NOT Towing)

So it seems that your mileage is about the same as mine. This is a BIG truck and its heavy and displaces a lot of air. You just cant move that for free. Also the big Hemi is not made for fuel economy. But its a great engine.

Look into that Fuel Buddy App its great. (and it is one of the few apps that does not want access to your phones/email contact list which is an important consideration when downloading free Apps)