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Originally Posted by Speedysam11
HI, I was wondering, is everyone with the Titan LE Crew 4x2, getting about 12.9 to 13.2 MPG or is it just me. I got this reading from the display computer in the truck. I spoke to a service manager from a dealer kneer my house and he said that from factory that the computer is pretty acurate..  |
The computer should be EXACTLY accurate. We have this discussion from time to time on a Cadillac forum I'm on with my other car. Sometimes what you figure at the pump may not coincide with the computer, but the computer is always going to be right (assuming the program code is correct).
There are two variables in figuring fuel mileage: the amount of fuel used and the distance driven. The computer knows EXACTLY how much fuel has been used since last reset because it's controlling the pulse width of the fuel injectors, meaning it's controlling how much fuel passes through each fuel injector. Similarly, as long as the speedometer/odometer is calibrated correctly in your vehicle, the computer also knows EXACTLY how far you've driven since last reset.
The next few tanks, do your own calculations at the fuel pump. Divide the miles driven since the last gas-up by the number of gallons used. This figure should be pretty close to what the computer is reporting. If its wildly off, there may be a problem somewhere, but I'd expect the computer to be spot on.