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2020 5.3L gas mileage

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My 5.3L / 8spd 2019 RST can be a bit all over the place. I've noticed this truck is very touchy with wind. 


E.g. I have a slight headwind, and I'll "only" get 20mpg doing 70-75mph. 


However, get a bit of a tailwind, and you'll get 26-28mpg doing the same MPH. It's really wild. 

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My 20 5.3 Z71 with 8-speed is averaging around 19 mpg.  On the highway with the cruise set at 71-72mph, it will get upwards of 22mpg while occasionally clipping 23 mpg.  Also owning an F250 gasser, this thing is ludicrous.

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My Elevation MY 20 work 8 speed was a solid 23-24mpg cruising 65-68 mph stock.

Once I added the level and upgraded to 285/60 AT tires, it's dropped to 21 MPG... Very happy with it.

Sent from my SM-N975U using Tapatalk

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