Re: Ultragauge distance calibration?
Finally I got a another chance at doing a distance calibration. Very unhappy with the first attempts, I decided I would drive a much longer calibration run. This time it would be over 40 miles.
Studying google maps I found a road that I could make an almost 20 mile straight run, and with a loop back the run was 42 miles. I would be using a hand held GPS for trip distance.
I had already reset the UG to factory defaults and then reinstalled allowing UG to find the vehicle info/gauges, BTW the default settings were not bad for my 4.0. I had to go almost 13 miles before I noticed a significant discrepancy between the GPS and UG. At the end of the calibration run the UG was off 1.016 miles after 42 miles were driven.
Or if you truck avg 20 mpg x 19.5 gal tank the gauge would be off about 2 gallons of gas. In my case I would be running out of gas based on the DTE reading for the default setting.
So what is the point of relating all this. 1 mile calibration is NOT, I repeat NOT, adequate enough to calibrate the UG. 10 miles isn't adequate, 30 miles minimum. Will the UG be accurate then? NO, after calibrating I did a 10 mile test and while it was close I noticed a few feet difference. Next week I plan on making a 75 mile trip, and it is all straight highway, I will do a calibration for 75 miles and see how close it will be.
For those of us who care about our gas mileage and bought the UG to help, this is very important.
2002 Ranger Edge 4.0, 2wd, M/T purchased Oct/2010 - 52,046mi