First off I didn't go out and spend $140 for this little item, I got it free with a purchase of tires. Anyway I figured I'd see how slow these damn cars are. I drive a 2000 Crown Vic with 40K miles, and ran a consistant 16.7 at 84mph. I was surprised how accurate the G-tech is, cause I compared on a few cars that have already been to the track. Its definately within a few tenths. We got busy last night and I wasn't able to test the 2001 with 20 extra ponies. I'll try again tonight, later.