I purchased a 2017 Ram 1500 Big Horn edition, with the 5.7 Hemi, just to tow our new 302SLE.
I opted for the 3:21 gearing to pick up some needed MPG when not towing. This gave me a towing capacity of approx. 8,700 lbs., which is more than adequate for the 302SLE's weight. This also gives me the ability to upsize my tires by two sidewall sizes, (i.e. 275 to 295), and thus alter the gear ratio up to 3:43, if I am unsatisfied with the towing performance. I average a calculated MPG of 16.6 around town and the instrument cluster shows 16.2. I have not had the truck on a non-towing trip as of yet, but will update this post when I do with that MPG.
The Ram seems to get decent MPG if I keep the RPMs below 2,000. It's a bit hard at times to keep it under 2 grand, but it IS possible. I follow that rule whether I am towing or not. I am not the first off the line, but I do get there!
We took our trailer on it's maiden voyage, if you will, to Chattanooga, TN. We live in Columbus, GA, so we were 3+ hours of freeway driving, according to the nav. system, from our destination. I always set my cruise 5 mph over the posted limit. And averaged a respectable 7.8 MPG that I calculated. The MPG displayed on the instrument cluster was 7.3. That was with a lot of stop and go traffic since the 3+ hour drive ended up being a little over 6.
On the return voyage, I kept the cruise set right on the posted limit. The results were 7.7 calculated and 7.1 on the instrument cluster. Not dramatically different from the way I normally drive on freeways.
Before anyone tells me how unsafe it is to tow a 34 foot trailer with the cruise control set on 75 MPH, let me make this statement. In 12 years as a tractor-trailer Owner Operator, I logged over 2 million miles ACCIDENT FREE miles and have USDOT plaques to that affect.