hello all, i know the overhead is not bang-on when it comes to fuel milage. how far off is it on other members trucks? i have kept check on mine since i got the truck, and unloaded, carrying and towing, any usage at all, the computer is 1 mile off the exact milage if it says 13.6 then it is 12.6 real, has anyone else found their number.

 

i have checked mine a few times and its always been -.3 from what it reads.close enough for me.

 

Mine has been way off. 3-4 MPG. I will check again

 

I haven't checked to be sure but it seems to be a mile or so off for me. The miles left counter is way off though. I trusted it once and that was a big mistake. Computer said 41 miles to empty and I ran out on the way to the fuel station. '08 4500 with 55g tank.

 

when we are traveling i watch that readout, and i trust it sometimes, but this will keep me on the high side rather than the low, thanks.

 

Certainly. I sure would have liked to know it before hand too lol. But live and learn. Sometimes you can learn before living and sometimes ya can't.

My boss was pissed though since the policy is never to go under 1/4 tank..

 

dasnake: When it comes to the Overhead Bogameter in regards to MPG, it's a joke. I do all my MPG measurements hand calculated. I never trust the range thing. I strictly go by miles driven and the Fuel guage. It's off by 4=> 5 MPG vs hand calculated. The temp readings and distance are accurate. Speedometer is within +/- 1.0 MPH radar verified. My GMC Yukons MPG is very accurate less <= 0.5 MPG compared to hand calculated.

 

I wish mine was right. It always reads over 20mpg. I'm lucky to get 16-17 hand calculating.

 

i notice the members commenting in this post have differing ages of their trucks, the older the truck, the more the overhead is out. like i said, mine is an '07, it has been the same since i bought it new, thanks for all the input.

angry, what year is your yukon?

 

My 06 has been consistently 4 MPG off since day 1. If you're filling the neck also your MPG will be off according to the overhead Lie-o-meter, YMMV