The following observations were made with my GPS that has latest software update version.
Speedometer treading @ 70 MPH *** GPS 69.9 MPH @ 2100 rpm
Odometer Reading @ 50 miles *** GPS 50.86 miles = 1.72 mile error in 100 miles or 1.72% error.
Back in town at the first stop light a Toyota Tacoma 4x4 pulled up beside me and made all the drag motions of making truck jump forward a few feet a couple of times before the light changed. I had just filled the CRD and also had 4 gallons in fuel can in the back, so I was at full weight and some. Anyway the light changed to green and he chirped the tires as his female passanger flipped me the bird, needless to say I had a moment of supprise before I was able to hammer the throttle. Then I squalled tires for about ten feet and shot past him as his gasser sounded like it was reaching about 10,000 RPM's, then we got to the next intersection and where he tried again. This time I was ready and I beat him off the line and was able to roll down window and return the sulute as he fell behind.
It was so much fun, I felt 40 years younger.