I use the heck out of the scan guage on the Jetta TDI. I have put the instant mileage on top and the overall mpg
for the current trip on the bottom. As long as I have the top one up, I am winning. With my scan gauge you can monitor 4 computer functions. I have instant mpg
left top, average mpg
left bottom, manifold pressure right top and block temp right bottom.
The scan gauge was worth an extra 5+ mpg
for me with the Jetta. I was getting 47 to 48 mpg
before the gauge and after learning (big change in driving habits) to drive the Jetta and using the scan gauge, I am able to turn in 54 to 59 mpg
. The improvement was all it learning how to modify my driving habits and using the the systems built into the computer of the Jetta. The big advantage of its computer is that anytime you are decelerating in gear, no fuel is use. I think that is the case with the Ford computer, but then I am not sure about that yet. I would venture a guess that that is how Dave takes advantage of his 6 speed F-250.
I have been contemplating a scan gauge for the 97 F-250, but keep getting conflicting information about how it will work with the computer on the 97 and what information it will give. Why don't I put the Jetta scan gauge in the 97, I kind of have it hard wired in the Jetta and it would be pain the the butt to change over. Plus I don't use the 97 that much for DD as it uses 3 times the fuel.
It is all about driving habits and using the tools of the computer.
Ask me about the difference of driving like a maniac in the left freeway lanes versus the far right lane. It is amazing the number of damn fools that you get to watch go past you and then remember how I use to be one of those damn fools. lol