Highway fuel mileage

[GPurcell01]

The hardware isn't an issue. It's the software. You can still find tuners on the web, but those shops that are still advertised are garbage, and you're probably going to have a lot of issues with the tune.

No issues. Nothing but a better driving truck...

 

[GPurcell01]

New best of 18.8mpg today. Better than I ever got stock. Was cruising 77mph.

 

[ColderWeather86]

New best of 18.8mpg today. Better than I ever got stock. Was cruising 77mph.

Can you PM me who you got the software from for your Canadian weight loss?

 

[Dmbecke]

2020 3500 Aisan and I’m getting 20 mpg on the highway unloaded

 

[Papa_smurf]

2022 2500 bighorn cummins mega cab 4x4 and i'm getting 20-21 on the HWY.
I get around 17 daily driving with mixed roads. 15 if i'm dogging it.

 

[Will_T]

About the same as most here are saying. 19 to 20 mpg unloaded and about 11 to 11.5 tops towing our TT.

 

[sstoner911]

If you are concerned about fuel mileage....don't buy a Diesel HD truck.

My best mileage was with a SO with a 68RFE. Even with that best was 16 in town and maybe 11 towing flat ground at 65mph.

I now have a HO with 4.10 gears and absolutely give zero cares about MPG...I mean I just got 8.9mpg towing through the mountains in Northern Az at 75mph mostly.

Deleted trucks have almost no mpg gains to justify the cost.

People who delete and tune should care less about MPG than I do because you don't delete for fuel savings....if you do you are fooling yourself.

I read all kinds of horror stories on tunes now that the EPA has cracked down... mostly because all the legit tuners have been put out of business.

 

[Steve_Cornell]

I'm running the emissions intact CTT tunes, keeps the EGR closed and no longer uses DEF, truck still regens just uses no DEF plus I'm not circulating all those exhaust gasses and crap back through my motor.
Stock exhaust and intake, all stock except the tune, I'm running on level 2 tune on #3 fueling and I'm getting 20 -21 mpg if I keep it under 75.
20 3500 SRW HO with Aisin
Here is my average at a little over 300 miles on this tank, 50\50 mix of interstate and 2 lane driving in WV, so certainly not flat land but I was keeping my foot out of it and setting the cruise at 75 on the interstate.

 

[GPurcell01]

If you are concerned about fuel mileage....don't buy a Diesel HD truck.

My best mileage was with a SO with a 68RFE. Even with that best was 16 in town and maybe 11 towing flat ground at 65mph.

I now have a HO with 4.10 gears and absolutely give zero cares about MPG...I mean I just got 8.9mpg towing through the mountains in Northern Az at 75mph mostly.

Deleted trucks have almost no mpg gains to justify the cost.

People who delete and tune should care less about MPG than I do because you don't delete for fuel savings....if you do you are fooling yourself.

I read all kinds of horror stories on tunes now that the EPA has cracked down... mostly because all the legit tuners have been put out of business.

This diesel gets considerably better fuel economy than my old f150. Towing and unloaded.

I guess I'm fooling myself.

 

[Grayson]

 

[Grayson]

This was today, 50F outside. Not flat highway just rolling elevations changes

 

[ColderWeather86]

Wow! Huge improvement over what it used to be. Stock, my 2008 was getting only 14.3 before I deleted. After that it still wasn't getting 20. That's impressive.

 

[CharlieL]

On the 1,117 mile trip home with my new 2500 SO 68RFE I saw 20.71 highway, just me, doing whatever the speed limit was between Iowa and New Mexico & on cruise control vast majority of the trip. Over the next few fillups I've seen in the 14-15 range in town. The Road Trip app shows an average mpg of 15.8 over 3,417 total miles. Probably around 1,600 of this is unloaded highway, 993 of towing (primarily interstate) on a 1,500 mile recent trip (13.52 mpg on that) and the rest city.

The 993 trailer towing amount is from the trailer mileage function, so I'm assuming that's pretty accurate.

 

[Lab_Rat]

“…Canadian weight-loss…”

Lol

That’s the best phrasing I’ve heard yet

 

[rudyyoko]

I got 25.5 on the computer, about 150 mile trip from Durham NC to Charlotte NC. The fastest I cruised was 65 mph. Got about the same coming back. The truck has about 3600 miles on it now. I average about 18.5 60% highway, 40% city. I do not accelerate hard and I always have my exhaust brake on, not auto. I drive a stock emissions 2022 2500, CTD SO, crewcab laramie, 4x4, with a 6.4 bed and 3.73 gears. Stock tires, wheels and height. This was also in early February so still chilly out here when I took this trip.

 

[Darmichar]

On the 1,117 mile trip home with my new 2500 SO 68RFE I saw 20.71 highway, just me, doing whatever the speed limit was between Iowa and New Mexico & on cruise control vast majority of the trip. Over the next few fillups I've seen in the 14-15 range in town. The Road Trip app shows an average mpg of 15.8 over 3,417 total miles. Probably around 1,600 of this is unloaded highway, 993 of towing (primarily interstate) on a 1,500 mile recent trip (13.52 mpg on that) and the rest city.

The 993 trailer towing amount is from the trailer mileage function, so I'm assuming that's pretty accurate.

Love the RoadTrip app. I've tracked every drop of fuel that has been put into my vehicles with that app since 2011.