I just did a comparison of computer and hand calculation of my MPG.
Since buying the truck back on 4.4.11, I have not reset the numbers on "TRIP B".
Lifetime numbers:
Computer:
518.1 Gal.
9486 miles
18.3 MPG
Hand Calculation from my gas receipts:
513.731 Gallons
9486 miles
18.46 MPG
518.100
513.731
4.369 gallons difference
(My hand calcs have always been a little higher than the computer).
I am satisfied with this. It includes only some minor towing and hauling, but mostly combined 50/50 driving. I have been able to get as much as 22.4 MPG @ 63 MPH on a 60 mile trip (that is tops for me). If I don't forget, I plan on taking some pics closer to 10,000 miles.
I do have some minor issues that I will have the dealer address @ the 10,000 mile service interval coming real soon: I do have a shudder that happens at 0-5 MPH in 1st gear from a complete stop; some tire wear even after a rotate at 7000 miles; and my tailgate cable straps are not the same length and I'm afraid it is going to put a strain on the tailgate that has the cable with too much slack.