Originally Posted by LS6454
Those MPG readouts are rarely ever accurate . If they were then according to mine in my 06 Chevy with a duramax Iam getting 26 mpg at 55 mph. and we all know that isn't true !!!
My dash on my duramax is never more than 1 mpg off. Normally it is within .5 mpg. I reset the "fuel used" display after I fill up and it is about .25 gallons accurate to the pump. I track my fuel economy rigorously with an app on my phone and the truck is pretty damn good!