Originally Posted by scgator
When not towing, just normal driving, we are getting 22-25.5 MPG with our Dodge Quad Cab Hemi. Most people do not believe it, but we have not modified the truck in any way (other than the correct tires.) Recently, we took a trip to Lima, Ohio (without the TT) getting on the Interstate, we set the cruise for 65 MPH, then after about 2 miles I hit the "reset" 2X on the computer and the fuel management system reset its default to 21.3 ! Many people do not know that you can make your fuel computers recalibrate according to your driving style. Routinely, around town, we average 19-20 MPG doing this......but you HAVE to monitor your MPG and reset as necessary. We get the 25 MPG when cruising at 55 MPH or less on the freeway. If you experience a low mileage reading, such as you would get from merging on an entrance ramp, you MUST reset after you are in traffic, or the computer will default to "the last highest demand for fuel quantity"; in other words, if while merging your fuel mileage dropped to 12.7, then it would default there until you told it different by resetting the computer.
Truck Specs: 2004 Dodge Ram 1500 Quad Cab
Hemi Engine / 5 Speed Automatic
3.55 Rear Gear Ratio / 142,000 miles
That method of attaining an accurate average fuel economy number is completely flawed. You note the impressive 21 + MPG at 65 MPH while not taking into consideration the fuel burned getting up to that speed!
Using your method, I can make the readout in my tractor trailer show 299.9 MPG while the reality is that the yearly average is 7MPG. Which I'm very impressed with BTW.