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I bought the Rebel for the Eco. Only one I could find. For me fuel economy,and longevity are biggest reasons for buying. That being said,really like the look of the truck. With 90 % of my driving being highway changing out the tires to a smoother, safer and better tire made sense. Looking forward to getting my boat setup,once it warms up.
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Of course the diesel guy has to come in bragging
Nice numbers!
there is a huge difference between gas & diesel mpg but the actual long term monetary savings on both is about the same. when u add the cost of diesel, DEF, the special oil & filter, & the additional manufacturer mark up for diesel engine. so right now, I'm actually at a negative value compared to an exact same rebel running a hemi.
i think the hemi sounds so much better & faster than the diesel. even the stock hemi. good thing I'm older now & prefer a quieter vehicle & drive slower.
i used the average of 12 mpg hemi & 23 mpg eco for my calculations. i came up with about 60k miles to break even the hemi.
. BUT, they only weigh 49 lbs., so my mpg was hovering around 17.5. I've switched to Michelin Defender LTX, 33", 51 lbs., only available in "E" load range, much like the Rebels, and have dropped to 15mpg. 
The grill and fender flares probably don't make that much difference to mpg.
I'll leave an interesting observation of my Ram. I have a Tradesman with ORP, same as a Rebel heightwise. Non Rebel ORPs come with (apparently special OEM mpg softies) Falken Wildpeak AT3WAs in "C" load range. They tow very poorly, and are only 32"
No, the difference was about 2-3mph. I think I'm 1mph slower reading than moving.
Maybe, but I was looking at the percentage of error of 2 mph at 75mph, vs the percentage drop of 17.5 to 15mpg. Those percentages do not appear to be similar. The point is the change from "C" range to "E" range tires, which I have seen on the last 3 trucks owned, and the difference the Rebels (and TRXs) see from other trim levels. Since I do a lot of off roading, I may look to go to 20" and "C" range tires as a compromise (same as my son's), because there just isn't a selection in 18".
The calibration won't recoup all of the 2.5 MPG. When did you get the new tires? The remaining amount might be due to colder weather/winter fuel.
2022 with 5,000 miles. The best I can do is 17.5mpg on the highway with a real soft touch doing about 70. Around town 15 to 16 mpg, again with a soft touch.
