Quote Originally Posted by Dinkie Diesel View Post
With about 450 miles on the odometer this was snapped after an hour at 70mph with cruise on. This is what makes me question a good many folks who claim they get 20+mpg. I don't think my new baby would get that going down hill with a tail wind.
The key is bolded above. Now I have had tanks run in the 19's at 70mph. but if there is any wind load it gets really tough and it will not do this with stock programming.