Quote Originally Posted by SONIC View Post
Oh yeah I'm not worried about it at all just thought it was odd as my last duramax would pull 22 on the interstate with just a tune and this one never tops 16.
My 2020 Dmax was getting 20 mpg on the highway with the cruise set at 79-80 (most of the time) around town 14 mpg. No tune, just factory. Been pretty happy with it. I honestly haven’t paid much attention with the new rims and 35’s on it though. Probably less now.


Sent from my iPhone using Tapatalk