2019 LTZ 4x4 5.3L- Concerning MPG

[MacLaren]

On 10/25/2019 at 12:46 PM, Texas_Trail_Boss said:

2019 Custom TrailBoss 4X4 CrewCab, completely stock. 

 

I did a down and back from DFW to Texarkana last weekend and found the sweet spot, or what I consider the sweet spot for mileage on this particular truck.  On the way to Texarkana, I averaged 19.6 MPG with the cruise set to 2 over the posted limit.  An early Sunday departure negated the DFW traffic issues.  

 

On the way back, that fell to 18.2 MPG facing a headwind and 5 over the posted limit.  My truck hates high speed and wind really plays a part in wrecking the mileage.  I drive it on the HWY 121 tollway in the 80MPH range often and barely get 17.

 

My commute through the middle of DFW is 22 miles one-way and today the truck showed 20.1MPG on the Lie-O-Meter in the dash. 

 

I wish I could see when this engine goes down to 4 cyclinders like in my Suburban.  This motor is the old-version 5.3L with the 6-speed.

Yeah, you would get a lot better mileage with the new DFM 5.3