On Thu, 29 Sep 2016 20:59:36 -0600, rbowman
wrote:

On 09/29/2016 06:54 PM, wrote:
Replace the speedo gear with the correct one for
the gearing and tire size.

Or that was the secret about 20 years ago...

http://www.hypertech-inc.com/product...alibrator.aspx

It's more difficult in this century for most vehicles.

If I was a deceitful guy I would set the speedo to read in KM and set
it up to think I had appropriately smaller tires (60% of stock). Then
it would rack up fewer miles. Set everything back to stock when you
sell it.