Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Vote for the Site Favourite ROTM winner for the year of 2021 HERE!
1 - 3 of 3 Posts

·
Registered
Joined
·
115 Posts
Discussion Starter · #1 ·
Went away for the weekend and was pretty impressed I averaged 18.6 mpg on my old baby, going 75-85 mph on my 80 horse efi tune...


Sent from AutoGuide.com Free App
 

·
Registered
Joined
·
492 Posts
That's exactly what I just got yesterday on a 300 mile trip running 78-80
 
1 - 3 of 3 Posts
Top