Fuel mileage

[TX NIGHT TRAIN]

Well I made a 480 mile round trip this morning. Empty and cruise set at 72mph. Rpms at ~1500. Hand calculated at 13.8! I tried every tune from 30hp -150. My truck is obviously not liking the 37s. Stays about 8lbs of boost and VGT stays around 50%. Sped up to 75 @1600 Rpms and was about the same result. This was my first Hwy trip since installing the warp tuning. I was hoping for better but power is freaking amazing!

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[Noneck]

I'm lucky to average 18mpg on the highway at 70 to 75mph with 35s and 3.42s. Getting about 13 around town.

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[Noneck]

I used to get 17 and 24 in my 03 Cummins quad. I recently asked Ray if a higher tune would net more mileage. He said it didn't matter and my mileage was typical and not really expect any better. I realize the engine is bigger but you'd think with the next generation truck and engine that mileage would be increased not decreased. Im still mystified myself.

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[TX NIGHT TRAIN]

I'm really considering dropping back to 33s when I buy new tires in the spring. I really want to be cruzing around 1700 or at 72-75. That's where my truck usually sees the best mileage

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[AnOldBiker]

I hate to say it, but ever consider the weight of the truck, the increase of HP and Torque over each generation ... and there seems to be 4X4 labeled in most people info that adds a partical load for any vehicle with additional weight ? What 700 plus pounds ? I've seen many in '06's getting more than I, but they were 2 wheel drive. Each pound, each larger tire and such adds weight or drag and helps set the MPG obtainable limits we can reach.

You get to a point, to get better mpg's, you must remove weight or reduce drag. (and it's hard ... like me loosing weight .. )

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[TX NIGHT TRAIN]

I hate to say it, but ever consider the weight of the truck, the increase of HP and Torque over each generation ... and there seems to be 4X4 labeled in most people info that adds a partical load for any vehicle with additional weight ? What 700 plus pounds ? I've seen may in '06's getting more than I, but they were 2 wheel drive. Each pound, each larger tire and such adds weight or drag and helps set the MPG obtainable limits we can reach.

You get to a point, to get better mpg's, you must remove weight or reduce drag. (and it's hard ... like me loosing weight .. )

Yes sir I agree 100%...that's why I'm really considering dropping tire size. I don't expect to be in the 20s with this heavy truck for sure. But I know 1500 cruise rpm is just low with for the weight.

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[Noneck]

Understood and agreed @AnOldBiker it's just that cars are getting more efficient and an 03 Ram 2500 quad Cummins 4x4 I wouldn't expect to be hugely different from a 13 quad Cummins 4x4 both with 35s. You'd think the increased hp would offset the weight increase over generations and be more efficient at moving the same loads. At the end of the day it is what it is and this generation truck is certainly a generation ahead of my 03 and I wouldn't trade it for anything! My 03 was the longest vehicle I have ever owned at 10 years. I plan to.do the same or better with this one.

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[Power247]

Weight and tires aside... overall vehicle aerodynamics come into play as well. I love the look of my 4th gen but the front is flat as a brick. Much less contour than the previous body styles.

Greg
2012 | RAM 2500 | CCSB | Custom tuned by Double R Diesel
2016 | Heartland Pioneer | DS310

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[elcubano]

Y'all need to stop. I get 11-12 all highway unloaded 70-72. No mods other than deletes and RaceMe. City I get about 10-11.
Trailering 6k I get ....8ish maybe. Trailering 16k, maybe 5-7. I use my wife's gas burner with 200k miles and worn out springs to tow light because at least that hemi gets 9-10

I'm about to go at this piece of garbage a case of ether and a match.

Averaging 340-370 miles per hwy tank and 240-260 towing the small trailer. Usually filling at the 30gal point.

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[TX NIGHT TRAIN]

Y'all need to stop. I get 11-12 all highway unloaded 70-72. No mods other than deletes and RaceMe. City I get about 10-11.
Trailering 6k I get ....8ish maybe. Trailering 16k, maybe 5-7. I use my wife's gas burner with 200k miles and worn out springs to tow light because at least that hemi gets 9-10

I'm about to go at this piece of garbage a case of ether and a match.

Averaging 340-370 miles per hwy tank and 240-260 towing the small trailer. Usually filling at the 30gal point.

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I think yours is definitely an odd ball. I followed your thread.

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