Ok, ive been talkin to all my 24v 2nd gen buddys forever about there mpg's highway/city and what not basically im gettin about 25 to 26.5 on highway hand calculated but my main point is i was just seein if anyone's overhead mpg display was accurate because mine is like dead on and always has been as funny as it sounds, all my buddy's cummins are dead wrong and off just seein if anyone else overhead is accurate

 

I dont think i have ever seen one accurate... Most of the time they tell you way more than what you are actually getting.

 

Mine is fairly close, I never reset mine so that may have something to do with it.

 

Same here, almost the same as hand calculated.

 

My 24v is pretty close. Usually within a mile or two. My 6.7 is the one that is just hilarious to look at !