[Ramius]

Recording the highest speed you've driven could only be cause for a ticket if it was hooked to GPS data, without that there's no way to prove you were on a public road and the speed was illegal.

Unless that number was, say, 135. :-)

[KarlInOhio]

Whenever you buy a new car, rent some time at a racetrack and keep the receipt. Unless the computer keeps a record of time and location, you can always claim you did that track. Nothing illegal about 135 on private property.

[discostu]

On private property it's perfectly legal to do 135, you're insurance company might get a little irrate, but that's why private race tracks have all kinds of waivers for you to sign that make you temporarily uninsured while driving there.