Not a chance you get 28 on the 22s or newer.. I've tried 65 in a 65 on free way.. to 90 on the freeway and it'd like 2.0 mpg difference.. 20.5 at 90.. 22.5 doing 65
37 lol.. must have been all down hill. My brother owns an 2021 duramax... he gets 28 on the freeway. I bought a 2022 brand new..have 21k on it and I am lucky to see 22.5 mpg on the freeway doing 75. These are great trucks...
Kasey
Got it on trade.. bedded a stock to it and never shot it. Ba done by blue mountain precision
-Defiance Anti X XM action bdl cut
- 23 inch benchmark barrel chambered in 300wsm .. 1/9 twist
-Manners ajustable carbon stock, pillar bedded to BA( stock was previously used and had some wear showing)...