Anyone go from a PowerStroke to a Duramax?

[txtrophy85]

I'll start off by saying I'm a fan of Ford, Chevy and Dodge.

I currently run a 2017 F-250. Love the truck, gobs of power and like the look.

I hate the fuel mileage. I run close to 50k miles a year, and 13-14 mpg is getting old. Granted I have 37" tires on it, but still didn't get much better with 35's.

I do like the look of the 2020 GMC's. I drove a 17' Duramax back when I was buying my truck and it didn't feel like it would pull a door closed....it was a major dog compared to the Powerstroke but I hear that its a different animal now and the fuel mileage is much better.


Anyone in a 2019 or 2020 Duramax?

[justindiehl7]

Go drive a new powerstroke with the 10 speed. Major fuel mileage improvements. My 2020 dually gets 12 loaded down every day with 10-20k pounds. Highway around 70 is around 17.5-18. Single wheel trucks should be even more.


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[MacDaddy67]

I am the original owner of a 2004 Duramax with 225K miles on it....from day one I have got 20mpg and pulled anything I wanted....

She just pulled a 2017 43' open range 17,000# 5th wheel from Lake Somerville and back with no issues....
The same engine used today with vast improvements over the last 17 years....

Duramax is a **** good engine

[TX_Hoghunter]

I had one that was a 2014 and it pulled great. No complaints at all. Wish I still owned it.

-john

[Quackerbox]

I had an 09 4x4 short bed CC Duramax and felt like it had more power than I ever needed. I averaged 23 with it to and from Alabama running 75 and 80 but it was tuned. I only got rid of it because it rode like a buck board

[txtrophy85]

All pre-DEF diesels got pretty decent mileage

A Cummins would see 20+ mpg with a mild tune as would a Duramax. A Powerstroke would see 16-18 mpg

Comparing those to a modern diesel isn’t apples to apples. My uncle had a old 7.3 liter international turbo diesel ( one year before the power stroke ) and his got 20 mpg.

[SETX_Insanity]

Delete and tune should fix mpg's. Unless you're already deleted..

[TX03RUBI]

The 2020 6.7 Powerstroke with 10 spd is getting much better mileage than the 17-19 6.7

[TX03RUBI]

Delete and tune should fix mpg's. Unless you're already deleted..

It’s not going to help that much. I’ve got a 17 6.7 deleted and tuned on 37s and get 15-16 highway normally. Occasionally I squeak 17 out of it being easy on the skinny pedal.

[Mike D]

It’s not going to help that much. I’ve got a 17 6.7 deleted and tuned on 37s and get 15-16 highway normally. Occasionally I squeak 17 out of it being easy on the skinny pedal.

Yep the DEF trucks just don’t see that much improvement in mileage.


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[RMW]

Buddy has a 2020 durmax 2500 and the Guage said 18-19 on the Hwy

[ACCURACYINC]

445 hp and 910 lb ft should handle anything you need. I'm on my 3rd Duramax since 2007 and with the exception of DEF system issues on my 2013, I have been very pleased.

[ACCURACYINC]

One addition I would strongly suggest is a throttle sensor. It seriously reduces the turbo lag. You won't believe the difference.

[Hollywood]

I am running a 2019 Duramax, running up & down the toll rd. about 120 miles a day at 80 MPH, I get 16.4 MPG. Keep it around 70 & get 17.5 MPG. Plenty of power. The 2020 should do better on mileage due to the transmission changes. My 2019 still runs the 6 speed allison. The new one run an 8 or 10 speed.

[Hardware]

Putting bigger tires on is going to kill mpg on any truck period!!! My experience is a decrease of 2 to 3 mpg for 35's and 3 to 4 mpg for 37's stock or deleted.