9.1 mpg

[DPKetchum]

Service manager at the dealer I stop at to shoot the bull sometimes said a new flash is out for overhead and some other minor issues(for 06s etc. ). It also loads ALL of the latest and greatest updates in one download. He mentioned this last week.

 

[JensenC]

have you checked your tire pressure and make sure they are aired up? just a simple thing like that can hurt your gas mileage.

 

[GDollenger]

I have to believe that the new ULSD fuel is definitely hurting my mileage. My "new" 04. 5 has 32000 miles on it and I always averaged 17mpg empty until my local filling station changed fuel last month. Now I average 15. 5 empty. My towing mileage also dropped from 12. 5mpg to only getting 10mpg on my recent trip last week(2000 miles on I-95) I tow a 10000lb 5'ver and never go over 70mph while towing.

 

[DPKetchum]

The NEW fuel has been in the pipes for a while now. It's not a one day its not being used and the next day it is. My 03 mileage hasn't changed at all in fact the last couple weeks its at the high end of mpg I've ever gotton out of it. Go figure.